Daily Math — 2026-06-27
Grade 1 Problems
[Easy] Counting Crayons
- EN: Mia has 7 crayons. She finds 5 more. How many crayons does she have in all?
- FR: Mia a 7 crayons. Elle en trouve 5 de plus. Combien de crayons a-t-elle en tout?
- Choices: A) 10 B) 11 C) 12 D) 13
- Hint: When we add two numbers, we count on from the bigger one. For example, 6 + 3: start at 6 and count 3 more — 7, 8, 9. Try the same idea with your numbers!
- Steps:
- Step 1: Let's try a similar problem: 8 + 4. Start at 8 and count 4 more: 9, 10, 11, 12. So 8 + 4 = 12.
- Step 2: Use the same "count on" method starting from the bigger number in your problem!
- Answer: 12
[Easy] Hockey Goals
- EN: A hockey team scored 9 goals on Monday and 4 goals on Tuesday. How many goals in total?
- FR: Une équipe de hockey a marqué 9 buts lundi et 4 buts mardi. Combien de buts en tout?
- Choices: A) 11 B) 12 C) 13 D) 14
- Hint: Count on from the bigger number. For example, 8 + 3: start at 8 and count 3 more — 9, 10, 11. So 8 + 3 = 11. Now try your numbers the same way!
- Steps:
- Step 1: Try 6 + 5. Start at 6, count 5 more: 7, 8, 9, 10, 11. So 6 + 5 = 11.
- Step 2: Use the same strategy — start at the bigger number and count on the smaller one!
- Answer: 13
[Easy] Skip Counting Skates
- EN: Count by 2s. What number comes after 12?
- FR: Compte par 2. Quel nombre vient après 12?
- Choices: A) 13 B) 14 C) 15 D) 16
- Hint: Skip counting by 2s means adding 2 each time. For example: 4, 6, 8 — each number is 2 more than the one before. Try adding 2 to your number!
- Steps:
- Step 1: Let's skip count by 2s starting at 6: 6, 8, 10. Each step adds 2.
- Step 2: Use that same idea — add 2 to 12 to find the next number!
- Answer: 14
[Easy] Snowball Subtraction
- EN: There are 15 snowballs. Kids throw 6 of them. How many snowballs are left?
- FR: Il y a 15 balles de neige. Des enfants en lancent 6. Combien de balles de neige reste-t-il?
- Choices: A) 7 B) 8 C) 9 D) 10
- Hint: Subtraction means taking away. For example, 11 − 4: start at 11 and count back 4 — 10, 9, 8, 7. So 11 − 4 = 7. Try counting back on your problem!
- Steps:
- Step 1: Try 13 − 5. Start at 13, count back 5: 12, 11, 10, 9, 8. So 13 − 5 = 8.
- Step 2: Count back from 15 the same way to find what's left!
- Answer: 9
[Medium] Penny Count
- EN: You have 3 pennies and 2 nickels. How many cents do you have in all?
- FR: Tu as 3 sous et 2 pièces de 5 cents. Combien de cents as-tu en tout?
- Choices: A) 11 cents B) 13 cents C) 15 cents D) 17 cents
- Hint: A penny is worth 1 cent and a nickel is worth 5 cents. For example, 2 pennies + 1 nickel = 2 + 5 = 7 cents. Add up each coin type separately, then combine!
- Steps:
- Step 1: Try: 4 pennies + 1 nickel = 4 × 1 + 1 × 5 = 4 + 5 = 9 cents.
- Step 2: Use the same method — find the value of your pennies, find the value of your nickels, then add them together!
- Answer: 13 cents
[Medium] Comparing Numbers
- EN: Which number is greater: 47 or 74?
- FR: Quel nombre est plus grand : 47 ou 74?
- Choices: A) 47 B) 74 C) They are equal D) Can't tell
- Hint: To compare two-digit numbers, look at the tens digit first. For example, 52 vs. 25: 52 has 5 tens and 25 has 2 tens, so 52 is greater. Try looking at the tens digits in your problem!
- Steps:
- Step 1: Compare 36 and 63. 36 has 3 tens; 63 has 6 tens. Since 6 tens > 3 tens, 63 is greater.
- Step 2: Use the same idea — look at the tens digit of each number to decide which is greater!
- Answer: 74
[Medium] Dime Count
- EN: You have 4 dimes. How many cents is that in all?
- FR: Tu as 4 pièces de 10 cents. Combien de cents cela fait-il en tout?
- Choices: A) 20 cents B) 30 cents C) 40 cents D) 50 cents
- Hint: A dime is worth 10 cents. Skip count by 10s to find the total. For example, 3 dimes: 10, 20, 30 — so 3 dimes = 30 cents. Try counting by 10s for your dimes!
- Steps:
- Step 1: For 5 dimes, count by 10s: 10, 20, 30, 40, 50. So 5 dimes = 50 cents.
- Step 2: Use the same skip-counting-by-10s method with 4 dimes!
- Answer: 40 cents
[Medium] Skip Counting Maple Leaves
- EN: Count by 5s. What number comes after 25?
- FR: Compte par 5. Quel nombre vient après 25?
- Choices: A) 27 B) 28 C) 30 D) 35
- Hint: Skip counting by 5s means adding 5 each time. For example: 10, 15, 20 — each number is 5 more than the one before. Just add 5 to your number!
- Steps:
- Step 1: Let's skip count by 5s starting at 10: 10, 15, 20. Each step adds 5.
- Step 2: Add 5 to 25 using the same idea to find the next number in the pattern!
- Answer: 30
[Hard] Tim Hortons Timbits
- EN: There are 18 Timbits in a box. Some kids eat 9 of them. Then 3 more are added. How many Timbits are there now?
- FR: Il y a 18 Timbits dans une boîte. Des enfants en mangent 9. Puis on en ajoute 3. Combien y a-t-il de Timbits maintenant?
- Choices: A) 10 B) 11 C) 12 D) 13
- Hint: Solve step by step — do one operation at a time. For example, 14 − 6 + 2: first 14 − 6 = 8, then 8 + 2 = 10. Try the same two-step method!
- Steps:
- Step 1: Try 16 − 7 + 4. First, 16 − 7 = 9. Then, 9 + 4 = 13.
- Step 2: Use the same two-step method — subtract first, then add — with the numbers in your problem!
- Answer: 12
[Hard] Counting to 100
- EN: What number is 10 more than 83?
- FR: Quel nombre est 10 de plus que 83?
- Choices: A) 73 B) 84 C) 93 D) 103
- Hint: Adding 10 to a number just changes the tens digit by 1. For example, 10 more than 45 is 55 — the tens go from 4 to 5. Try applying that idea to your number!
- Steps:
- Step 1: 10 more than 62: the tens digit goes from 6 to 7, so the answer is 72.
- Step 2: Use the same rule — increase the tens digit by 1 — to find 10 more than 83!
- Answer: 93
Grade 2 Problems
[Easy] Adding at the Campsite
- EN: There are 34 campers in the morning. 15 more arrive in the afternoon. How many campers are there now?
- FR: Il y a 34 campeurs le matin. 15 autres arrivent l'après-midi. Combien y a-t-il de campeurs maintenant?
- Choices: A) 47 B) 49 C) 49 D) 49
- Hint: To add two-digit numbers, add the ones first, then the tens. For example, 23 + 14: ones: 3 + 4 = 7; tens: 2 + 1 = 3. Answer: 37. Try the same steps!
- Steps:
- Step 1: Let's try 42 + 13. Ones: 2 + 3 = 5. Tens: 4 + 1 = 5. Answer: 55.
- Step 2: Add the ones column first, then the tens column — use the same method for your problem!
- Answer: 49
[Easy] Telling Time
- EN: The clock shows the hour hand on 7 and the minute hand on 12. What time is it?
- FR: L'horloge montre la grande aiguille sur le 12 et la petite sur le 7. Quelle heure est-il?
- Choices: A) 6:00 B) 7:00 C) 7:30 D) 8:00
- Hint: When the minute hand points to 12, it is exactly on the hour. For example, if the hour hand is on 3 and the minute hand is on 12, the time is 3:00. What hour hand do you see?
- Steps:
- Step 1: If the hour hand is on 5 and the minute hand is on 12, the time is 5:00.
- Step 2: Use the same rule — minute hand on 12 means the time is exactly the hour number o'clock!
- Answer: 7:00
[Easy] Measuring a Pencil
- EN: A pencil is 15 cm long. A crayon is 8 cm long. How much longer is the pencil?
- FR: Un crayon mesure 15 cm de long. Un crayon de couleur mesure 8 cm. De combien le crayon est-il plus long?
- Choices: A) 5 cm B) 6 cm C) 7 cm D) 8 cm
- Hint: To find the difference in length, subtract the shorter from the longer. For example, 18 cm − 11 cm = 7 cm. Try subtracting in your problem!
- Steps:
- Step 1: A ruler is 20 cm; an eraser is 6 cm. Difference: 20 − 6 = 14 cm.
- Step 2: Subtract the smaller measurement from the bigger one the same way!
- Answer: 7 cm
[Easy] Coin Total
- EN: You have 2 dimes and 3 nickels. How many cents do you have?
- FR: Tu as 2 pièces de 10 cents et 3 pièces de 5 cents. Combien de cents as-tu?
- Choices: A) 25 cents B) 30 cents C) 35 cents D) 40 cents
- Hint: Count each coin type separately. A dime = 10 cents; a nickel = 5 cents. For example, 1 dime + 2 nickels = 10 + 5 + 5 = 20 cents. Then add your totals!
- Steps:
- Step 1: 3 dimes + 1 nickel: 3 × 10 = 30 cents for dimes; 1 × 5 = 5 cents for nickel. Total: 30 + 5 = 35 cents.
- Step 2: Find the total for each coin type, then add them — use the same method!
- Answer: 35 cents
[Medium] Subtraction at the Store
- EN: Lena had 72 stickers. She gave 38 to her friend. How many stickers does she have left?
- FR: Lena avait 72 autocollants. Elle en a donné 38 à son amie. Combien d'autocollants lui reste-t-il?
- Choices: A) 32 B) 34 C) 36 D) 38
- Hint: For subtraction with borrowing, regroup the tens. For example, 51 − 27: borrow from the tens (11 − 7 = 4 ones, then 4 − 2 = 2 tens). Answer: 24. Try the same idea!
- Steps:
- Step 1: Try 65 − 29. Ones: 5 − 9 needs borrowing. Borrow 1 ten: 15 − 9 = 6. Tens: 5 − 2 = 3. Answer: 36.
- Step 2: Use the same borrowing method for the ones and tens in your problem!
- Answer: 34
[Medium] Half-Hour Time
- EN: It is 2:30. Hockey practice starts at 3:00. How many minutes until practice?
- FR: Il est 2h30. La pratique de hockey commence à 3h00. Combien de minutes avant la pratique?
- Choices: A) 20 minutes B) 25 minutes C) 30 minutes D) 35 minutes
- Hint: Count the minutes between two times on the clock. For example, from 4:30 to 5:00 is 30 minutes — that's half an hour. Use the same idea!
- Steps:
- Step 1: From 1:30 to 2:00: the minute hand moves from 6 to 12, which is 30 minutes.
- Step 2: Count how many minutes from the half-hour to the next full hour — it's always 30 minutes!
- Answer: 30 minutes
[Medium] Pattern at the Bakery
- EN: A baker puts muffins in this pattern: 2, 4, 6, 8, ___. What number comes next?
- FR: Un boulanger place des muffins selon ce modèle : 2, 4, 6, 8, ___. Quel nombre vient ensuite?
- Choices: A) 9 B) 10 C) 11 D) 12
- Hint: Find the rule by checking how much each number increases. For example, 5, 10, 15, 20 — each number goes up by 5. Find the rule in your pattern and apply it!
- Steps:
- Step 1: Pattern: 3, 6, 9, 12. Each number increases by 3. So after 12 comes 12 + 3 = 15.
- Step 2: Find how much each number in your pattern increases, then add that amount to 8!
- Answer: 10
[Medium] Measuring the Hallway
- EN: One hallway at school is 9 metres long. Another is 6 metres long. How long are they together?
- FR: Un couloir à l'école fait 9 mètres de long. Un autre fait 6 mètres. Quelle est leur longueur totale?
- Choices: A) 13 m B) 14 m C) 15 m D) 16 m
- Hint: Adding lengths is just like adding regular numbers — just keep the unit the same. For example, 7 m + 8 m = 15 m. Try adding your two lengths!
- Steps:
- Step 1: A path is 11 m; another path is 4 m. Total: 11 + 4 = 15 m.
- Step 2: Add the two hallway lengths together the same way and include the unit "m"!
- Answer: 15 m
[Hard] Making Change
- EN: A school supply costs 63 cents. You pay with 3 quarters (75 cents). How much change do you get?
- FR: Une fourniture scolaire coûte 63 cents. Tu paies avec 3 pièces de 25 cents (75 cents). Combien reçois-tu de monnaie?
- Choices: A) 10 cents B) 11 cents C) 12 cents D) 13 cents
- Hint: Change = amount paid − cost. For example, if something costs 44 cents and you pay 50 cents: 50 − 44 = 6 cents change. Use the same subtraction method!
- Steps:
- Step 1: A snack costs 57 cents; you pay 70 cents. Change: 70 − 57 = 13 cents.
- Step 2: Subtract the price from the amount paid the same way to find your change!
- Answer: 12 cents
[Hard] Two-Step Problem
- EN: There are 45 students going on a trip. 18 students take the bus first. Then 14 more students board. How many students are on the bus now?
- FR: Il y a 45 élèves qui partent en excursion. 18 élèves prennent le bus en premier. Ensuite, 14 autres montent. Combien d'élèves sont dans le bus maintenant?
- Choices: A) 28 B) 30 C) 32 D) 34
- Hint: Solve in two steps — do each operation one at a time. For example, 20 + 10 + 5 = 30 + 5 = 35. Work left to right, one step at a time!
- Steps:
- Step 1: Try 22 + 8 + 6. First: 22 + 8 = 30. Then: 30 + 6 = 36.
- Step 2: Add the first group and second group together the same way — two steps!
- Answer: 32
Grade 3 Problems
[Easy] Maple Syrup Multiplication
- EN: A farmer fills 4 jars with maple syrup. Each jar holds 5 litres. How many litres in all?
- FR: Un fermier remplit 4 pots de sirop d'érable. Chaque pot contient 5 litres. Combien de litres en tout?
- Choices: A) 9 B) 15 C) 20 D) 25
- Hint: Multiplication means equal groups. For example, 3 × 5 = 5 + 5 + 5 = 15. Try adding your group size the right number of times!
- Steps:
- Step 1: 3 × 4 = 4 + 4 + 4 = 12. There are 3 groups of 4.
- Step 2: Use the same "equal groups" idea — add 5 four times to find your answer!
- Answer: 20
[Easy] Division at the Campfire
- EN: 12 marshmallows are shared equally among 3 friends. How many does each friend get?
- FR: 12 guimauves sont partagées également entre 3 amis. Combien chaque ami en reçoit-il?
- Choices: A) 2 B) 3 C) 4 D) 5
- Hint: Division means sharing equally. For example, 15 ÷ 3 = 5 because 3 × 5 = 15. Think: what times your divisor equals the total?
- Steps:
- Step 1: 10 ÷ 2: what times 2 equals 10? 2 × 5 = 10. So 10 ÷ 2 = 5.
- Step 2: Ask yourself: what times 3 equals 12? That's your answer!
- Answer: 4
[Easy] Fraction of a Pizza
- EN: A pizza is cut into 4 equal pieces. Luca eats 1 piece. What fraction did he eat?
- FR: Une pizza est coupée en 4 morceaux égaux. Luca en mange 1. Quelle fraction a-t-il mangée?
- Choices: A) 1/2 B) 1/3 C) 1/4 D) 1/5
- Hint: A fraction shows part of a whole. The bottom number is how many equal parts total; the top is how many you have. For example, 1 out of 3 equal parts = 1/3.
- Steps:
- Step 1: A chocolate bar is split into 2 equal parts. One part = 1 out of 2 = 1/2.
- Step 2: Use the same idea — 1 part out of 4 total equal parts = your answer!
- Answer: 1/4
[Easy] Perimeter of a Classroom
- EN: A rectangular desk is 4 cm long and 3 cm wide. What is its perimeter?
- FR: Un bureau rectangulaire mesure 4 cm de long et 3 cm de large. Quel est son périmètre?
- Choices: A) 12 cm B) 14 cm C) 16 cm D) 7 cm
- Hint: Perimeter means adding all sides. A rectangle has 2 long sides and 2 short sides. For example, length 5, width 2: perimeter = 5 + 5 + 2 + 2 = 14. Try adding all four sides!
- Steps:
- Step 1: Rectangle with length 6 and width 2: 6 + 6 + 2 + 2 = 16 cm.
- Step 2: Add all four sides of your rectangle the same way!
- Answer: 14 cm
[Medium] Hockey Cards
- EN: Jake has 5 packs of hockey cards. Each pack has 9 cards. How many cards in total?
- FR: Jake a 5 paquets de cartes de hockey. Chaque paquet contient 9 cartes. Combien de cartes au total?
- Choices: A) 40 B) 45 C) 50 D) 54
- Hint: Multiply the number of groups by the size of each group. For example, 4 × 7 = 28. Try using your times tables to find the answer!
- Steps:
- Step 1: 4 × 6 = 24. We have 4 groups of 6.
- Step 2: Use the same idea — multiply 5 × 9 using your multiplication facts!
- Answer: 45
[Medium] Reading a Graph
- EN: A bar graph shows: apples = 6, oranges = 4, bananas = 8. How many more bananas are there than apples?
- FR: Un graphique à barres montre : pommes = 6, oranges = 4, bananes = 8. Combien y a-t-il de bananes de plus que de pommes?
- Choices: A) 1 B) 2 C) 3 D) 4
- Hint: To find "how many more," subtract the smaller bar from the bigger bar. For example, if cats = 7 and dogs = 5, then 7 − 5 = 2 more cats. Try subtracting!
- Steps:
- Step 1: Red = 10, Blue = 6. How many more red? 10 − 6 = 4 more red.
- Step 2: Subtract the apples total from the bananas total the same way!
- Answer: 2
[Medium] Division with Tables
- EN: 30 students are put into groups of 5. How many groups are there?
- FR: 30 élèves sont répartis en groupes de 5. Combien y a-t-il de groupes?
- Choices: A) 4 B) 5 C) 6 D) 7
- Hint: Division is the opposite of multiplication. For example, 20 ÷ 4 = 5 because 4 × 5 = 20. Think: what times 5 equals 30?
- Steps:
- Step 1: 24 ÷ 4 = ? Ask: 4 × ? = 24. Since 4 × 6 = 24, the answer is 6.
- Step 2: Use the same multiplication fact strategy — what times 5 equals 30?
- Answer: 6
[Medium] Fraction Comparison
- EN: Which fraction is larger: 1/2 or 1/4?
- FR: Quelle fraction est plus grande : 1/2 ou 1/4?
- Choices: A) 1/4 B) They are equal C) 1/2 D) Can't tell
- Hint: When the top number (numerator) is the same, the bigger the bottom number, the smaller the piece. For example, 1/3 is bigger than 1/6 because thirds are larger pieces than sixths.
- Steps:
- Step 1: Compare 1/2 and 1/8. Imagine dividing a chocolate bar: halves are bigger pieces than eighths. So 1/2 > 1/8.
- Step 2: Use the same thinking — which gives a bigger piece, cutting into 2 parts or 4 parts?
- Answer: 1/2
[Hard] Two-Step Multiplication
- EN: A class collects cans for a food drive. Each of the 4 rows has 3 boxes, and each box has 10 cans. How many cans are there in all?
- FR: Une classe collecte des conserves pour une collecte alimentaire. Chacune des 4 rangées a 3 boîtes, et chaque boîte contient 10 conserves. Combien y a-t-il de conserves en tout?
- Choices: A) 100 B) 110 C) 120 D) 130
- Hint: Work step by step. First find the total number of boxes, then multiply by the cans per box. For example, 2 rows × 4 boxes = 8 boxes; 8 × 5 cans = 40 cans.
- Steps:
- Step 1: 3 rows × 2 boxes = 6 boxes. Then 6 boxes × 4 cans = 24 cans.
- Step 2: First find total boxes (4 × 3), then multiply that by 10 cans per box!
- Answer: 120
[Hard] Perimeter Challenge
- EN: A square garden has a perimeter of 28 m. What is the length of one side?
- FR: Un jardin carré a un périmètre de 28 m. Quelle est la longueur d'un côté?
- Choices: A) 5 m B) 6 m C) 7 m D) 8 m
- Hint: A square has 4 equal sides. Perimeter = 4 × side length. To find one side, divide the perimeter by 4. For example, perimeter = 20 m: 20 ÷ 4 = 5 m per side.
- Steps:
- Step 1: A square has perimeter 36 m. One side = 36 ÷ 4 = 9 m.
- Step 2: Divide your perimeter by 4 the same way to find the side length!
- Answer: 7 m
Grade 4 Problems
[Easy] Multiplication Table Hockey
- EN: A hockey arena has 7 rows of seats. Each row has 8 seats. How many seats are there in all?
- FR: Un aréna de hockey a 7 rangées de sièges. Chaque rangée a 8 sièges. Combien y a-t-il de sièges en tout?
- Choices: A) 48 B) 54 C) 56 D) 63
- Hint: Multiply rows by seats per row. For example, 6 rows × 7 seats = 42. Use your multiplication table to find 7 × 8!
- Steps:
- Step 1: 5 rows × 9 seats = 45 seats. Use the times table: 5 × 9 = 45.
- Step 2: Apply the same multiplication fact — look up or recall 7 × 8 in your table!
- Answer: 56
[Easy] Decimal Place Value
- EN: What is the value of the digit 3 in the number 4.37?
- FR: Quelle est la valeur du chiffre 3 dans le nombre 4,37?
- Choices: A) 3 ones B) 3 tenths C) 3 hundredths D) 30
- Hint: In a decimal number, the first digit after the decimal point is tenths, and the second is hundredths. For example, in 2.56: 5 is in the tenths place, 6 is in the hundredths place.
- Steps:
- Step 1: In 7.29: the 2 is in the tenths place, the 9 is in the hundredths place.
- Step 2: Use the same place-value chart — where is the 3 relative to the decimal point in 4.37?
- Answer: 3 tenths
[Easy] Area of a Rectangle
- EN: A Canadian flag is 6 cm long and 3 cm wide. What is its area?
- FR: Un drapeau canadien mesure 6 cm de long et 3 cm de large. Quelle est son aire?
- Choices: A) 12 cm² B) 15 cm² C) 18 cm² D) 21 cm²
- Hint: Area of a rectangle = length × width. For example, a rectangle that is 4 cm × 5 cm has an area of 4 × 5 = 20 cm². Don't forget the squared unit!
- Steps:
- Step 1: Rectangle: length = 7 cm, width = 2 cm. Area = 7 × 2 = 14 cm².
- Step 2: Multiply your length by your width the same way and label your answer cm²!
- Answer: 18 cm²
[Easy] Long Division
- EN: 48 pencils are packed equally into 6 boxes. How many pencils are in each box?
- FR: 48 crayons sont rangés également dans 6 boîtes. Combien y a-t-il de crayons dans chaque boîte?
- Choices: A) 6 B) 7 C) 8 D) 9
- Hint: Division = sharing equally. Ask: what times the divisor equals the dividend? For example, 35 ÷ 5: 5 × 7 = 35, so the answer is 7.
- Steps:
- Step 1: 42 ÷ 6. Ask: 6 × ? = 42. Since 6 × 7 = 42, the answer is 7.
- Step 2: Ask the same question — 6 × ? = 48 — to find how many pencils are in each box!
- Answer: 8
[Medium] Long Division with Remainder
- EN: 50 stickers are shared among 7 students. How many does each student get, and how many are left over?
- FR: 50 autocollants sont partagés entre 7 élèves. Combien chaque élève en reçoit-il et combien en reste-t-il?
- Choices: A) 6 remainder 8 B) 7 remainder 1 C) 7 remainder 2 D) 8 remainder 2
- Hint: For division with remainders, find the biggest multiple of the divisor that fits. For example, 23 ÷ 4: 4 × 5 = 20 (fits), so quotient = 5, remainder = 23 − 20 = 3.
- Steps:
- Step 1: 29 ÷ 6. 6 × 4 = 24 (fits in 29). Remainder: 29 − 24 = 5. Answer: 4 remainder 5.
- Step 2: Find the biggest multiple of 7 that fits in 50, then subtract to find the remainder!
- Answer: 7 remainder 1
[Medium] Elapsed Time
- EN: School starts at 8:45 a.m. and ends at 3:15 p.m. How long is the school day?
- FR: L'école commence à 8h45 et se termine à 15h15. Combien de temps dure la journée scolaire?
- Choices: A) 5 hours 30 minutes B) 6 hours C) 6 hours 30 minutes D) 7 hours
- Hint: Count up from the start time to the end time. For example, from 9:30 a.m. to 2:00 p.m.: count to 10:00 = 30 min, then 10:00 to 2:00 = 4 hours. Total: 4 hours 30 min.
- Steps:
- Step 1: From 7:15 a.m. to 12:45 p.m.: 7:15 to 12:15 = 5 hours; 12:15 to 12:45 = 30 min. Total: 5 hours 30 min.
- Step 2: Use the same count-up method starting from 8:45 a.m. to reach 3:15 p.m.!
- Answer: 6 hours 30 minutes
[Medium] Comparing Fractions
- EN: Which fraction is larger: 3/4 or 2/3?
- FR: Quelle fraction est plus grande : 3/4 ou 2/3?
- Choices: A) 2/3 B) 3/4 C) They are equal D) Can't tell
- Hint: To compare fractions with different denominators, find a common denominator. For example, 1/2 vs. 2/5: convert to tenths — 5/10 vs. 4/10. So 1/2 is larger.
- Steps:
- Step 1: Compare 2/3 and 3/5. Common denominator = 15. 2/3 = 10/15; 3/5 = 9/15. So 2/3 > 3/5.
- Step 2: Convert 3/4 and 2/3 to a common denominator (12) and compare them the same way!
- Answer: 3/4
[Medium] Decimal Operations
- EN: A bottle of maple syrup costs $3.45. A jar of honey costs $2.30. What is the total cost?
- FR: Une bouteille de sirop d'érable coûte 3,45 $. Un pot de miel coûte 2,30 $. Quel est le coût total?
- Choices: A) $5.55 B) $5.65 C) $5.75 D) $5.85
- Hint: Line up the decimal points when adding decimals. For example, $4.25 + $1.50: line up the dots, add hundredths (5 + 0 = 5), tenths (2 + 5 = 7), ones (4 + 1 = 5). Answer: $5.75.
- Steps:
- Step 1: $2.60 + $1.15. Hundredths: 0 + 5 = 5. Tenths: 6 + 1 = 7. Ones: 2 + 1 = 3. Answer: $3.75.
- Step 2: Line up decimal points for your problem the same way and add column by column!
- Answer: $5.75
[Hard] Multi-Step Area Problem
- EN: A school gym floor is 25 m long and 18 m wide. A storage room inside measures 5 m by 4 m. What is the area of the gym floor NOT including the storage room?
- FR: Le plancher d'un gymnase scolaire fait 25 m de long et 18 m de large. Une salle de rangement à l'intérieur mesure 5 m sur 4 m. Quelle est l'aire du plancher du gymnase sans la salle de rangement?
- Choices: A) 420 m² B) 430 m² C) 440 m² D) 450 m²
- Hint: Find the total area first, then subtract the smaller area. For example, big room = 10 × 8 = 80 m²; small closet = 2 × 3 = 6 m². Remaining = 80 − 6 = 74 m².
- Steps:
- Step 1: Big rectangle = 20 × 12 = 240 m². Small rectangle = 4 × 3 = 12 m². Remaining = 240 − 12 = 228 m².
- Step 2: Multiply length × width for each rectangle, then subtract the storage room area from the gym area!
- Answer: 430 m²
[Hard] Division and Multiplication Challenge
- EN: A school store sells 9 boxes of markers. Each box has 8 markers. The markers are divided equally among 6 classrooms. How many markers does each classroom get?
- FR: Une boutique d'école vend 9 boîtes de marqueurs. Chaque boîte contient 8 marqueurs. Les marqueurs sont partagés également entre 6 classes. Combien de marqueurs chaque classe reçoit-elle?
- Choices: A) 10 B) 11 C) 12 D) 13
- Hint: Solve in two steps — multiply first, then divide. For example: 4 boxes × 6 items = 24 items; shared among 8 groups: 24 ÷ 8 = 3 items per group.
- Steps:
- Step 1: 5 boxes × 6 items = 30 items. Divided among 5 groups: 30 ÷ 5 = 6 per group.
- Step 2: First find total markers (9 × 8), then divide by 6 to find each classroom's share!
- Answer: 12
Grade 5 Problems
[Easy] Multi-Digit Multiplication
- EN: A camping store orders 24 boxes of granola bars. Each box has 12 bars. How many bars are there in total?
- FR: Un magasin de camping commande 24 boîtes de barres granola. Chaque boîte contient 12 barres. Combien y a-t-il de barres en tout?
- Choices: A) 248 B) 268 C) 288 D) 308
- Hint: Multiply using the standard algorithm. For example, 23 × 11: (23 × 1) + (23 × 10) = 23 + 230 = 253. Break the second number into parts and add the products!
- Steps:
- Step 1: 21 × 13. (21 × 3) = 63; (21 × 10) = 210. Total: 63 + 210 = 273.
- Step 2: Use the same partial products method — multiply 24 × 2 and 24 × 10, then add!
- Answer: 288
[Easy] Adding Fractions
- EN: During gym class, Maya ran 2/6 of a lap and then 3/6 of a lap. How far did she run in total?
- FR: Pendant le cours d'éducation physique, Maya a couru 2/6 d'un tour, puis 3/6 d'un tour. Quelle distance a-t-elle parcourue au total?
- Choices: A) 5/12 B) 5/6 C) 6/6 D) 1/6
- Hint: When fractions have the same denominator, just add the numerators and keep the denominator. For example, 1/5 + 2/5 = 3/5. Try the same thing!
- Steps:
- Step 1: 2/7 + 3/7. Same denominator (7). Add tops: 2 + 3 = 5. Answer: 5/7.
- Step 2: Add the numerators in your problem the same way, keeping the denominator as 6!
- Answer: 5/6
[Easy] 25% Discount
- EN: A hockey stick costs $40. It is on sale for 25% off. How much is the discount?
- FR: Un bâton de hockey coûte 40 $. Il est en solde à 25 % de rabais. Quel est le montant du rabais?
- Choices: A) $5 B) $8 C) $10 D) $12
- Hint: 25% = one quarter. To find 25% of a number, divide by 4. For example, 25% of $60 = $60 ÷ 4 = $15. Try dividing your price by 4!
- Steps:
- Step 1: 25% of $80 = $80 ÷ 4 = $20 discount.
- Step 2: Divide the price by 4 the same way to find 25% of $40!
- Answer: $10
[Easy] Volume of a Box
- EN: A storage box is 5 cm long, 4 cm wide, and 3 cm tall. What is its volume?
- FR: Une boîte de rangement fait 5 cm de long, 4 cm de large et 3 cm de hauteur. Quel est son volume?
- Choices: A) 48 cm³ B) 60 cm³ C) 72 cm³ D) 80 cm³
- Hint: Volume of a rectangular prism = length × width × height. For example, 6 × 2 × 4 = 48 cm³. Multiply all three dimensions!
- Steps:
- Step 1: A box: 3 cm × 4 cm × 5 cm = 12 × 5 = 60 cm³. Wait — that's the same. Let's try 7 × 2 × 3 = 14 × 3 = 42 cm³.
- Step 2: Multiply all three measurements together the same way: 5 × 4 × 3 = ?
- Answer: 60 cm³
[Medium] Multi-Digit Division
- EN: 336 students are divided equally into 14 classrooms. How many students are in each classroom?
- FR: 336 élèves sont répartis également dans 14 classes. Combien d'élèves y a-t-il dans chaque classe?
- Choices: A) 20 B) 22 C) 24 D) 26
- Hint: For long division, estimate first. 14 × 20 = 280; 14 × 24 = 336. Try multiples of 14 to find which one equals 336!
- Steps:
- Step 1: 180 ÷ 12. 12 × 15 = 180. So 180 ÷ 12 = 15.
- Step 2: Try multiplying 14 by different numbers until you get 336 — that's your answer!
- Answer: 24
[Medium] Subtracting Fractions
- EN: A Tim Hortons cup was 7/8 full. After drinking, it was 3/8 full. How much was drunk?
- FR: Une tasse de Tim Hortons était remplie aux 7/8. Après avoir bu, elle était remplie aux 3/8. Combien a-t-on bu?
- Choices: A) 3/8 B) 4/8 C) 5/8 D) 10/8
- Hint: Subtract fractions with like denominators by subtracting the numerators and keeping the denominator. For example, 6/9 − 2/9 = 4/9.
- Steps:
- Step 1: 5/7 − 2/7. Same denominator. Subtract tops: 5 − 2 = 3. Answer: 3/7.
- Step 2: Subtract the numerators in your problem the same way, keeping 8 as the denominator!
- Answer: 4/8
[Medium] Decimal Operations
- EN: A bag of trail mix weighs 1.75 kg. Another bag weighs 2.40 kg. What is the total weight?
- FR: Un sac de mélange randonnée pèse 1,75 kg. Un autre sac pèse 2,40 kg. Quel est le poids total?
- Choices: A) 3.95 kg B) 4.05 kg C) 4.15 kg D) 4.25 kg
- Hint: Line up the decimal points when adding. Then add column by column from right to left. For example, 2.35 + 1.42: hundredths 5+2=7, tenths 3+4=7, ones 2+1=3. Answer: 3.77.
- Steps:
- Step 1: 3.25 + 1.60. Hundredths: 5+0=5. Tenths: 2+6=8. Ones: 3+1=4. Answer: 4.85.
- Step 2: Line up your decimals and add each column from right to left the same way!
- Answer: 4.15 kg
[Medium] Percentage — 10%
- EN: A school fundraiser raised $560. The school keeps 10% for supplies. How much money is kept?
- FR: Une collecte de fonds scolaire a recueilli 560 $. L'école garde 10 % pour les fournitures. Combien d'argent est gardé?
- Choices: A) $46 B) $56 C) $66 D) $76
- Hint: To find 10% of a number, divide by 10 (move the decimal one place left). For example, 10% of $430 = $43.00. Try dividing your amount by 10!
- Steps:
- Step 1: 10% of $820 = $820 ÷ 10 = $82.
- Step 2: Divide $560 by 10 the same way to find 10%!
- Answer: $56
[Hard] Multi-Step Fraction and Decimal Problem
- EN: A recipe uses 1/4 kg of butter and 0.50 kg of flour. A baker makes 3 batches. How many kilograms of ingredients are used in total?
- FR: Une recette utilise 1/4 kg de beurre et 0,50 kg de farine. Un boulanger fait 3 lots. Combien de kilogrammes d'ingrédients sont utilisés au total?
- Choices: A) 2.00 kg B) 2.25 kg C) 2.50 kg D) 2.75 kg
- Hint: Find the total per batch first (convert 1/4 to a decimal), then multiply by number of batches. For example, if one batch uses 0.30 + 0.50 = 0.80 kg, then 3 batches = 0.80 × 3 = 2.40 kg.
- Steps:
- Step 1: 1 batch uses 0.20 kg + 0.60 kg = 0.80 kg. For 4 batches: 0.80 × 4 = 3.20 kg.
- Step 2: Convert 1/4 to 0.25, add to 0.50 for one batch total, then multiply by 3!
- Answer: 2.25 kg
[Hard] Volume and Percentage
- EN: A fish tank has a volume of 200 cm³. It is filled to 50% capacity. How many cm³ of water are in the tank?
- FR: Un aquarium a un volume de 200 cm³. Il est rempli à 50 % de sa capacité. Combien de cm³ d'eau y a-t-il dans l'aquarium?
- Choices: A) 50 cm³ B) 75 cm³ C) 100 cm³ D) 150 cm³
- Hint: 50% means half. To find 50% of a number, divide by 2. For example, 50% of 340 = 340 ÷ 2 = 170.
- Steps:
- Step 1: A tank of 160 cm³ at 50%: 160 ÷ 2 = 80 cm³ of water.
- Step 2: Divide your volume by 2 the same way to find 50% of 200 cm³!
- Answer: 100 cm³
Grade 6 Problems
[Easy] Ratio at the Bake Sale
- EN: For every 2 muffins sold, there are 5 cookies sold. If 6 muffins are sold, how many cookies are sold?
- FR: Pour chaque 2 muffins vendus, il y a 5 biscuits vendus. Si 6 muffins sont vendus, combien de biscuits sont vendus?
- Choices: A) 12 B) 13 C) 14 D) 15
- Hint: A ratio is a comparison. If the ratio is 2:5 and you multiply 2 by 3 to get 6, multiply 5 by the same number (3). For example, ratio 3:4; if 3 becomes 9 (×3), then 4 × 3 = 12.
- Steps:
- Step 1: Ratio 2:7. 2 × 4 = 8. So 7 × 4 = 28.
- Step 2: Find what you multiply 2 by to get 6, then apply the same multiplier to 5!
- Answer: 15
[Easy] Percent of a Number
- EN: There are 80 students at a school event. 50% of them are wearing red. How many students wear red?
- FR: Il y a 80 élèves à un événement scolaire. 50 % d'entre eux portent du rouge. Combien d'élèves portent du rouge?
- Choices: A) 30 B) 35 C) 40 D) 45
- Hint: 50% means half. Divide the total by 2. For example, 50% of 60 = 60 ÷ 2 = 30. Apply the same idea to your number!
- Steps:
- Step 1: 50% of 120 = 120 ÷ 2 = 60.
- Step 2: Divide 80 by 2 the same way to find 50% of your group!
- Answer: 40
[Easy] Integer Introduction
- EN: The temperature in Winnipeg is −8°C in the morning. By afternoon it rises 5 degrees. What is the afternoon temperature?
- FR: La température à Winnipeg est de −8°C le matin. L'après-midi, elle monte de 5 degrés. Quelle est la température l'après-midi?
- Choices: A) −4°C B) −3°C C) −2°C D) −1°C
- Hint: Adding a positive number to a negative number means moving right on the number line. For example, −6 + 4: start at −6, move right 4 steps → −2.
- Steps:
- Step 1: −10 + 7. Start at −10 on a number line, move right 7: −10, −9, −8, −7, −6, −5, −4, −3. Answer: −3.
- Step 2: Start at −8 and count up 5 steps the same way to find the afternoon temperature!
- Answer: −3°C
[Easy] Simple Algebraic Expression
- EN: Write an expression for "3 more than a number n."
- FR: Écris une expression pour «3 de plus qu'un nombre n».
- Choices: A) n − 3 B) 3n C) n + 3 D) n ÷ 3
- Hint: "More than" means addition. For example, "5 more than x" is written as x + 5. Match the words to the operation!
- Steps:
- Step 1: "7 more than y" → y + 7. The number added goes after the plus sign.
- Step 2: Use the same word-to-symbol rule — "3 more than n" uses addition!
- Answer: n + 3
[Easy] Rate Problem
- EN: A car travels 90 km in 1 hour. At the same rate, how far does it travel in 3 hours?
- FR: Une voiture parcourt 90 km en 1 heure. Au même rythme, quelle distance parcourt-elle en 3 heures?
- Choices: A) 240 km B) 260 km C) 270 km D) 280 km
- Hint: Rate × time = distance. For example, if a car goes 60 km/h, in 4 hours it travels 60 × 4 = 240 km.
- Steps:
- Step 1: Speed = 70 km/h. In 5 hours: 70 × 5 = 350 km.
- Step 2: Multiply the rate (90 km/h) by the number of hours (3) the same way!
- Answer: 270 km
[Medium] Order of Operations (BEDMAS)
- EN: Solve: 3 + 4 × 2 − 1
- FR: Résous : 3 + 4 × 2 − 1
- Choices: A) 13 B) 10 C) 12 D) 9
- Hint: BEDMAS says multiplication comes before addition and subtraction. For example, 5 + 3 × 4 − 2: first 3 × 4 = 12, then 5 + 12 − 2 = 15. Always do multiplication before adding or subtracting!
- Steps:
- Step 1: Solve 6 + 2 × 5 − 3. First: 2 × 5 = 10. Then: 6 + 10 − 3 = 13.
- Step 2: Use the same BEDMAS order — do the multiplication in your problem first, then add and subtract left to right!
- Answer: 10
[Medium] Fraction Multiplication
- EN: A recipe calls for 3/4 cup of oats. If you make 2 batches, how many cups do you need?
- FR: Une recette demande 3/4 de tasse d'avoine. Si tu fais 2 lots, de combien de tasses as-tu besoin?
- Choices: A) 5/4 B) 6/4 C) 3/2 D) Both B and C
- Hint: To multiply a fraction by a whole number, multiply the numerator by the whole number and keep the denominator. For example, 2/5 × 3 = 6/5.
- Steps:
- Step 1: 3/7 × 2 = 6/7. Multiply the top (3 × 2 = 6) and keep the bottom (7).
- Step 2: Multiply 3/4 × 2 the same way — multiply only the numerator by 2!
- Answer: 6/4
[Medium] Percent Discount
- EN: A pair of skates costs $120. There is a 25% discount. What is the sale price?
- FR: Une paire de patins coûte 120 $. Il y a un rabais de 25 %. Quel est le prix de vente?
- Choices: A) $80 B) $85 C) $90 D) $95
- Hint: Find the discount amount first (25% = ÷4), then subtract from original price. For example, 25% of $80 = $20; sale price = $80 − $20 = $60.
- Steps:
- Step 1: 25% of $160 = $160 ÷ 4 = $40. Sale price = $160 − $40 = $120.
- Step 2: Find 25% of $120 (divide by 4), then subtract that from $120!
- Answer: $90
[Medium] Integer Operations
- EN: −15 + (−7) = ?
- FR: −15 + (−7) = ?
- Choices: A) −8 B) −22 C) 22 D) −21
- Hint: Adding two negative numbers gives a larger negative number. Think of moving left on a number line twice. For example, −5 + (−6) = −11.
- Steps:
- Step 1: −9 + (−4). Both negative: add the values, keep the negative sign. 9 + 4 = 13. Answer: −13.
- Step 2: Add 15 and 7 together, then put a negative sign on your answer — same rule!
- Answer: −22
[Medium] Fraction Division
- EN: How many 1/3-cup servings are in 4 cups of juice?
- FR: Combien de portions de 1/3 de tasse y a-t-il dans 4 tasses de jus?
- Choices: A) 8 B) 10 C) 12 D) 14
- Hint: Dividing by a fraction means multiplying by its reciprocal. For example, 3 ÷ 1/4 = 3 × 4 = 12. Flip the fraction and multiply!
- Steps:
- Step 1: 5 ÷ 1/2 = 5 × 2 = 10. Flip 1/2 to get 2, then multiply.
- Step 2: Apply the same flip-and-multiply rule: 4 ÷ 1/3 = 4 × 3 = ?
- Answer: 12
[Medium] Writing Expressions
- EN: A loonie costs $1. If you have n loonies, write an expression for your total in dollars.
- FR: Un huard vaut 1 $. Si tu as n huards, écris une expression pour ton total en dollars.
- Choices: A) n + 1 B) 1 − n C) n D) n ÷ 1
- Hint: If each item costs $1 and you have n of them, multiply: total = 1 × n = n. For example, 3 loonies = $3; n loonies = $n.
- Steps:
- Step 1: 5 items at $2 each = 5 × 2 = $10. For n items at $2 each = 2n dollars.
- Step 2: For n items at $1 each, multiply 1 × n — what does that simplify to?
- Answer: n
[Hard] BEDMAS with Brackets
- EN: Solve: (5 + 3) × 2 − 4 ÷ 2
- FR: Résous : (5 + 3) × 2 − 4 ÷ 2
- Choices: A) 12 B) 14 C) 16 D) 18
- Hint: BEDMAS: Brackets first, then multiplication and division (left to right), then addition and subtraction. For example, (2 + 6) × 3 − 8 ÷ 4 = 8 × 3 − 2 = 24 − 2 = 22.
- Steps:
- Step 1: Solve (4 + 2) × 3 − 6 ÷ 2. Brackets: 4+2=6. Then: 6×3=18 and 6÷2=3. Finally: 18−3=15.
- Step 2: Apply the same BEDMAS steps to your expression — brackets, then × and ÷, then − !
- Answer: 14
[Hard] Ratio and Rate Problem
- EN: A car uses 8 litres of gas per 100 km. How many litres are needed for a 375 km trip?
- FR: Une voiture consomme 8 litres d'essence aux 100 km. Combien de litres faut-il pour un trajet de 375 km?
- Choices: A) 28 L B) 30 L C) 32 L D) 34 L
- Hint: Set up a proportion: 8/100 = ?/375. Cross-multiply: 8 × 375 ÷ 100. For example, 6/100 × 200 = 12 litres.
- Steps:
- Step 1: Rate = 6 L/100 km. For 250 km: (6 × 250) ÷ 100 = 1500 ÷ 100 = 15 L.
- Step 2: Use the same formula: (8 × 375) ÷ 100 to find the litres needed!
- Answer: 30 L
[Hard] Integer and Expression Challenge
- EN: What is the value of 4n − 3 when n = −2?
- FR: Quelle est la valeur de 4n − 3 lorsque n = −2?
- Choices: A) −11 B) −10 C) −9 D) −8
- Hint: Substitute the value of n into the expression. For example, if n = −3: 4(−3) − 3 = −12 − 3 = −15. Multiply first, then subtract!
- Steps:
- Step 1: 3n + 5 when n = −4. 3 × (−4) = −12. Then −12 + 5 = −7.
- Step 2: Substitute n = −2 into 4n − 3: multiply 4 × (−2) first, then subtract 3!
- Answer: −11
[Hard] Percent Increase
- EN: Last year, 200 students joined a school club. This year there are 250 students. What is the percent increase?
- FR: L'année dernière, 200 élèves ont rejoint un club scolaire. Cette année, il y en a 250. Quel est le pourcentage d'augmentation?
- Choices: A) 20% B) 25% C) 30% D) 35%
- Hint: Percent increase = (increase ÷ original) × 100. For example, if it goes from 40 to 50: increase = 10; 10 ÷ 40 × 100 = 25%.
- Steps:
- Step 1: From 60 to 90. Increase = 30. (30 ÷ 60) × 100 = 50%.
- Step 2: Find the increase (250 − 200), divide by 200, multiply by 100 the same way!
- Answer: 25%
Grade 7 Problems
[Easy] Integer Addition
- EN: A submarine is at −45 m. It rises 20 m. What is its new depth?
- FR: Un sous-marin est à −45 m. Il monte de 20 m. Quelle est sa nouvelle profondeur?
- Choices: A) −30 m B) −25 m C) −20 m D) −15 m
- Hint: Adding a positive to a negative means moving right (up) on the number line. For example, −30 + 12 = −18. Start at your negative number and add!
- Steps:
- Step 1: −50 + 15. Start at −50, add 15: −50 + 15 = −35.
- Step 2: Start at −45 and add 20 the same way to find the new depth!
- Answer: −25 m
[Easy] Percent — Tip Calculation
- EN: A meal at a Canadian restaurant costs $60. You leave a 10% tip. How much is the tip?
- FR: Un repas dans un restaurant canadien coûte 60 $. Tu laisses un pourboire de 10 %. Quel est le montant du pourboire?
- Choices: A) $5 B) $6 C) $7 D) $8
- Hint: 10% of a number = divide by 10. For example, 10% of $90 = $90 ÷ 10 = $9. Try dividing your amount by 10!
- Steps:
- Step 1: 10% of $150 = $150 ÷ 10 = $15.
- Step 2: Divide $60 by 10 the same way to find your 10% tip!
- Answer: $6
[Easy] One-Step Equation
- EN: Solve for x: x + 9 = 17
- FR: Résous pour x : x + 9 = 17
- Choices: A) 6 B) 7 C) 8 D) 9
- Hint: To isolate x, subtract the same number from both sides. For example, x + 5 = 12 → x = 12 − 5 = 7.
- Steps:
- Step 1: x + 6 = 14. Subtract 6 from both sides: x = 14 − 6 = 8.
- Step 2: Subtract 9 from both sides of your equation the same way to find x!
- Answer: 8
[Easy] Probability
- EN: A bag has 3 red marbles and 7 blue marbles. What is the probability of picking a red marble?
- FR: Un sac contient 3 billes rouges et 7 billes bleues. Quelle est la probabilité de piger une bille rouge?
- Choices: A) 3/7 B) 3/10 C) 7/10 D) 1/3
- Hint: Probability = favourable outcomes ÷ total outcomes. For example, 4 red out of 9 total = 4/9. Count your total and put red on top!
- Steps:
- Step 1: 5 green, 5 yellow marbles. P(green) = 5/(5+5) = 5/10.
- Step 2: Total marbles = 3 + 7 = 10. Put red (3) over total (10) the same way!
- Answer: 3/10
[Easy] Fraction Decimal Conversion
- EN: Convert 3/4 to a decimal.
- FR: Convertis 3/4 en décimale.
- Choices: A) 0.50 B) 0.65 C) 0.75 D) 0.80
- Hint: To convert a fraction to a decimal, divide the numerator by the denominator. For example, 1/4 = 1 ÷ 4 = 0.25.
- Steps:
- Step 1: 2/5 = 2 ÷ 5 = 0.40.
- Step 2: Divide 3 by 4 the same way to convert your fraction to a decimal!
- Answer: 0.75
[Medium] Integer Multiplication
- EN: The temperature drops 4°C every hour for 6 hours. What is the total change in temperature?
- FR: La température baisse de 4°C à chaque heure pendant 6 heures. Quel est le changement total de température?
- Choices: A) −20°C B) −24°C C) −28°C D) −32°C
- Hint: A negative times a positive gives a negative. For example, −5 × 3 = −15. Multiply and apply the sign rule!
- Steps:
- Step 1: −6 × 5 = −30. Negative × positive = negative.
- Step 2: Multiply −4 × 6 the same way — the answer will be negative!
- Answer: −24°C
[Medium] Discount and Tax
- EN: A backpack costs $80. There is a 15% discount and then 13% tax applied to the sale price. What is the sale price before tax?
- FR: Un sac à dos coûte 80 $. Il y a un rabais de 15 %, puis une taxe de 13 % est appliquée au prix de vente. Quel est le prix de vente avant taxes?
- Choices: A) $64 B) $66 C) $68 D) $70
- Hint: Discount amount = original × (discount% ÷ 100). Sale price = original − discount. For example, 20% off $60: 60 × 0.20 = $12 off; sale price = $60 − $12 = $48.
- Steps:
- Step 1: 25% off $100. Discount = 100 × 0.25 = $25. Sale price = 100 − 25 = $75.
- Step 2: Find 15% of $80, then subtract to get the sale price the same way!
- Answer: $68
[Medium] Two-Step Equation
- EN: Solve: 2x + 5 = 19
- FR: Résous : 2x + 5 = 19
- Choices: A) 5 B) 6 C) 7 D) 8
- Hint: First subtract the constant from both sides, then divide. For example, 3x + 4 = 13: 3x = 13 − 4 = 9; x = 9 ÷ 3 = 3.
- Steps:
- Step 1: 4x + 3 = 23. Subtract 3: 4x = 20. Divide by 4: x = 5.
- Step 2: Subtract 5 from both sides first, then divide by 2 the same way!
- Answer: 7
[Medium] Surface Area
- EN: A rectangular box is 6 cm long, 4 cm wide, and 3 cm tall. What is its surface area?
- FR: Une boîte rectangulaire mesure 6 cm de long, 4 cm de large et 3 cm de hauteur. Quelle est son aire de surface?
- Choices: A) 96 cm² B) 100 cm² C) 108 cm² D) 72 cm²
- Hint: Surface area of a rectangular prism = 2(lw + lh + wh). For example, l=4, w=3, h=2: 2(12 + 8 + 6) = 2(26) = 52 cm².
- Steps:
- Step 1: l=5, w=2, h=3. lw=10, lh=15, wh=6. Sum=31. SA = 2 × 31 = 62 cm².
- Step 2: Calculate lw, lh, and wh for your box, add them, then multiply by 2!
- Answer: 108 cm²
[Medium] Mean and Median
- EN: Five students scored: 72, 85, 90, 68, 90. What is the median score?
- FR: Cinq élèves ont obtenu ces résultats : 72, 85, 90, 68, 90. Quel est le résultat médian?
- Choices: A) 80 B) 82 C) 85 D) 90
- Hint: To find the median, arrange the numbers in order and find the middle one. For example, 3, 7, 9, 12, 15 → middle value is 9.
- Steps:
- Step 1: Scores: 10, 14, 18, 22, 26. Ordered: 10, 14, 18, 22, 26. Middle (3rd) = 18.
- Step 2: Order your five scores from least to greatest, then pick the middle (3rd) value!
- Answer: 85
[Medium] Percentage Problem
- EN: In a class of 30 students, 40% play hockey. How many students play hockey?
- FR: Dans une classe de 30 élèves, 40 % jouent au hockey. Combien d'élèves jouent au hockey?
- Choices: A) 10 B) 12 C) 14 D) 16
- Hint: Percent of a number = (percent ÷ 100) × total. For example, 30% of 50 = (30/100) × 50 = 0.30 × 50 = 15.
- Steps:
- Step 1: 20% of 40 = 0.20 × 40 = 8 students.
- Step 2: Multiply 0.40 × 30 the same way to find your answer!
- Answer: 12
[Hard] Integer All Four Operations
- EN: Evaluate: (−36) ÷ (−4) + (−3) × 5
- FR: Évalue : (−36) ÷ (−4) + (−3) × 5
- Choices: A) −6 B) −3 C) 3 D) 6
- Hint: Negative ÷ negative = positive; negative × positive = negative. Use order of operations: division and multiplication before addition. For example, (−12) ÷ (−3) + (−2) × 4 = 4 + (−8) = −4.
- Steps:
- Step 1: (−20) ÷ (−5) + (−2) × 6. Division: −20 ÷ −5 = 4. Multiplication: −2 × 6 = −12. Then: 4 + (−12) = −8.
- Step 2: Do the division and multiplication in your problem first, then add the results!
- Answer: −6
[Hard] Surface Area Challenge
- EN: A triangular prism has a triangular face with base 6 cm and height 4 cm, and a length of 10 cm. The three rectangular faces have widths 5, 5, and 6 cm. What is the total surface area?
- FR: Un prisme triangulaire a une face triangulaire de base 6 cm et de hauteur 4 cm, et une longueur de 10 cm. Les trois faces rectangulaires ont des largeurs de 5, 5 et 6 cm. Quelle est l'aire de surface totale?
- Choices: A) 196 cm² B) 202 cm² C) 208 cm² D) 212 cm²
- Hint: Total SA = 2 × triangle area + sum of rectangular faces. Triangle area = (base × height) ÷ 2. Each rectangle area = width × length of prism.
- Steps:
- Step 1: Triangle: base=4, height=3. Area = (4×3)÷2 = 6 cm². Two triangles = 12 cm². Three rectangles: widths 3, 3, 4 each × length 8: 24+24+32=80. Total=92 cm².
- Step 2: Find both triangle areas, then find each rectangle's area (width × 10), and add everything together!
- Answer: 208 cm²
[Hard] Probability
- EN: A spinner has 8 equal sections numbered 1–8. What is the probability of spinning a number greater than 5?
- FR: Une roulette a 8 sections égales numérotées de 1 à 8. Quelle est la probabilité d'obtenir un nombre supérieur à 5?
- Choices: A) 1/4 B) 3/8 C) 1/2 D) 5/8
- Hint: Count the favourable outcomes (numbers greater than 5), then divide by total sections. For example, numbers > 4 on a 6-spinner: 5, 6 = 2 favourables out of 6 → 2/6 = 1/3.
- Steps:
- Step 1: Numbers > 3 on spinner 1–6: 4, 5, 6 = 3 outcomes. P = 3/6 = 1/2.
- Step 2: List numbers greater than 5 from 1–8, count them, then divide by 8!
- Answer: 3/8
[Hard] Multi-Step Discount and Tax
- EN: A snowboard originally costs $240. It's on sale for 20% off. Then 13% HST is added. What is the final price?
- FR: Une planche à neige coûte originalement 240 $. Elle est en solde à 20 % de rabais. Ensuite, la TVH de 13 % est ajoutée. Quel est le prix final?
- Choices: A) $210.24 B) $214.24 C) $216.24 D) $220.24
- Hint: Step 1: Find the sale price (original − 20% discount). Step 2: Add 13% tax to the sale price. For example, $100 − 20% = $80; $80 + 13% = $80 × 1.13 = $90.40.
- Steps:
- Step 1: $200 − 20% = $200 × 0.80 = $160. Then $160 × 1.13 = $180.80.
- Step 2: Find 80% of $240 first (that's the sale price), then multiply by 1.13 for tax!
- Answer: $216.24
Grade 8 Problems
[Easy] Perfect Squares
- EN: What is √144?
- FR: Quel est √144?
- Choices: A) 10 B) 11 C) 12 D) 13
- Hint: A perfect square root asks: what number times itself equals the value? For example, √81: 9 × 9 = 81, so √81 = 9.
- Steps:
- Step 1: √100: 10 × 10 = 100. So √100 = 10.
- Step 2: Ask yourself: what number × itself = 144? That's your square root!
- Answer: 12
[Easy] Two-Step Equation
- EN: Solve: 3x − 4 = 11
- FR: Résous : 3x − 4 = 11
- Choices: A) 3 B) 4 C) 5 D) 6
- Hint: Add the constant to both sides first, then divide. For example, 5x − 6 = 19: 5x = 25; x = 5.
- Steps:
- Step 1: 4x − 3 = 13. Add 3: 4x = 16. Divide by 4: x = 4.
- Step 2: Add 4 to both sides, then divide by 3 the same way!
- Answer: 5
[Easy] Mean
- EN: Five hockey games had scores of: 3, 5, 4, 6, 2. What is the mean score?
- FR: Cinq parties de hockey ont eu les résultats suivants : 3, 5, 4, 6, 2. Quel est le résultat moyen?
- Choices: A) 3 B) 4 C) 5 D) 6
- Hint: Mean = sum of values ÷ number of values. For example, 4, 6, 8, 10: sum = 28; mean = 28 ÷ 4 = 7.
- Steps:
- Step 1: Values: 2, 4, 6, 8. Sum = 20. Mean = 20 ÷ 4 = 5.
- Step 2: Add all five scores together, then divide by 5 to find the mean!
- Answer: 4
[Easy] Percent Increase
- EN: A hockey player scored 20 goals last season and 25 goals this season. What is the percent increase?
- FR: Un joueur de hockey a marqué 20 buts la saison dernière et 25 buts cette saison. Quel est le pourcentage d'augmentation?
- Choices: A) 20% B) 25% C) 30% D) 35%
- Hint: Percent increase = (increase ÷ original) × 100. For example, from 40 to 50: increase = 10; (10 ÷ 40) × 100 = 25%.
- Steps:
- Step 1: From 30 to 36. Increase = 6. (6 ÷ 30) × 100 = 20%.
- Step 2: Find the increase (25 − 20), divide by original (20), multiply by 100!
- Answer: 25%
[Easy] Pythagorean Theorem — Find Hypotenuse
- EN: A right triangle has legs of 3 cm and 4 cm. What is the hypotenuse?
- FR: Un triangle rectangle a des jambes de 3 cm et 4 cm. Quelle est l'hypoténuse?
- Choices: A) 4 cm B) 5 cm C) 6 cm D) 7 cm
- Hint: Use a² + b² = c². For example, legs 6 and 8: 36 + 64 = 100; √100 = 10.
- Steps:
- Step 1: Legs 5 and 12: 25 + 144 = 169. √169 = 13. Hypotenuse = 13 cm.
- Step 2: Square both legs (3² + 4²), add them, then take the square root!
- Answer: 5 cm
[Medium] Two-Step Equation with Fractions
- EN: Solve: x/3 + 4 = 9
- FR: Résous : x/3 + 4 = 9
- Choices: A) 12 B) 13 C) 14 D) 15
- Hint: Subtract the constant first, then multiply both sides to clear the fraction. For example, x/4 + 2 = 7: x/4 = 5; x = 5 × 4 = 20.
- Steps:
- Step 1: x/5 + 3 = 8. Subtract 3: x/5 = 5. Multiply by 5: x = 25.
- Step 2: Subtract 4 from both sides, then multiply by 3 to find x!
- Answer: 15
[Medium] Pythagorean Theorem — Find a Leg
- EN: A right triangle has a hypotenuse of 13 cm and one leg of 5 cm. Find the other leg.
- FR: Un triangle rectangle a une hypoténuse de 13 cm et un côté de 5 cm. Trouve l'autre côté.
- Choices: A) 10 cm B) 11 cm C) 12 cm D) 13 cm
- Hint: Use a² + b² = c² → b² = c² − a². For example, hypotenuse 10, leg 6: b² = 100 − 36 = 64; b = 8.
- Steps:
- Step 1: Hypotenuse 17, leg 8: b² = 289 − 64 = 225; b = √225 = 15 cm.
- Step 2: Square the hypotenuse and the known leg, subtract, then take the square root!
- Answer: 12 cm
[Medium] Slope Introduction
- EN: A ramp rises 6 m over a horizontal distance of 12 m. What is the slope?
- FR: Une rampe monte de 6 m sur une distance horizontale de 12 m. Quel est la pente?
- Choices: A) 1/4 B) 1/3 C) 1/2 D) 2/3
- Hint: Slope = rise ÷ run. For example, rise = 4, run = 8: slope = 4/8 = 1/2.
- Steps:
- Step 1: Rise = 3, run = 9. Slope = 3/9 = 1/3.
- Step 2: Divide the rise by the run the same way — simplify your fraction if needed!
- Answer: 1/2
[Medium] Percent Decrease
- EN: A snowblower was $450. After winter it is marked down to $360. What is the percent decrease?
- FR: Un chasse-neige coûtait 450 $. Après l'hiver, son prix est réduit à 360 $. Quel est le pourcentage de diminution?
- Choices: A) 15% B) 18% C) 20% D) 25%
- Hint: Percent decrease = (decrease ÷ original) × 100. For example, $80 to $60: decrease = $20; (20 ÷ 80) × 100 = 25%.
- Steps:
- Step 1: $200 to $150. Decrease = $50. (50 ÷ 200) × 100 = 25%.
- Step 2: Find the decrease (450 − 360), divide by original (450), multiply by 100!
- Answer: 20%
[Medium] Mode
- EN: Snowfall amounts (cm) over 7 days: 5, 8, 3, 8, 5, 8, 2. What is the mode?
- FR: Quantités de neige (cm) sur 7 jours : 5, 8, 3, 8, 5, 8, 2. Quel est le mode?
- Choices: A) 2 B) 5 C) 8 D) 3
- Hint: The mode is the value that appears most often. For example, in 4, 7, 4, 9, 4: 4 appears 3 times, so mode = 4.
- Steps:
- Step 1: Data: 2, 2, 3, 5, 5, 5, 6. 5 appears 3 times — mode = 5.
- Step 2: Count how many times each number appears in your data set — the most frequent one is the mode!
- Answer: 8
[Medium] Square Roots and Perfect Squares
- EN: Which of the following is NOT a perfect square?
- FR: Lequel des éléments suivants N'est PAS un carré parfait?
- Choices: A) 49 B) 64 C) 72 D) 81
- Hint: A perfect square is the result of multiplying a whole number by itself. For example, 36 = 6 × 6. Check if each number has a whole-number square root!
- Steps:
- Step 1: Is 50 a perfect square? √50 ≈ 7.07 (not whole). Is 25? √25 = 5 (whole). So 50 is NOT a perfect square.
- Step 2: Check each choice — can you find a whole number that, squared, gives you that number?
- Answer: 72
[Hard] Two-Step Equation — Negative Coefficients
- EN: Solve: −4x + 7 = 27
- FR: Résous : −4x + 7 = 27
- Choices: A) −7 B) −6 C) −5 D) −4
- Hint: Subtract 7 from both sides, then divide by −4. Remember: dividing by a negative flips the sign. For example, −3x + 5 = 14: −3x = 9; x = 9 ÷ (−3) = −3.
- Steps:
- Step 1: −5x + 3 = 23. Subtract 3: −5x = 20. Divide: x = 20 ÷ (−5) = −4.
- Step 2: Subtract 7 from both sides, then divide by −4 — watch the sign!
- Answer: −5
[Hard] Pythagorean Theorem Application
- EN: A 15 m ladder leans against a wall. Its base is 9 m from the wall. How high up the wall does the ladder reach?
- FR: Une échelle de 15 m s'appuie contre un mur. Sa base est à 9 m du mur. À quelle hauteur le long du mur l'échelle atteint-elle?
- Choices: A) 10 m B) 11 m C) 12 m D) 13 m
- Hint: Use a² + b² = c². The ladder is the hypotenuse (c = 15), base = 9, find height. b² = c² − a² = 225 − 81 = 144; b = √144 = 12.
- Steps:
- Step 1: Hypotenuse = 17, base = 8. Height² = 289 − 64 = 225. Height = √225 = 15 m.
- Step 2: Square 15 and 9, subtract, then take the square root to find the height!
- Answer: 12 m
[Hard] Slope and Rate of Change
- EN: A swimming pool fills at a constant rate. After 2 hours it has 300 L; after 5 hours it has 750 L. What is the rate of change (slope) in litres per hour?
- FR: Une piscine se remplit à un rythme constant. Après 2 heures, elle contient 300 L; après 5 heures, 750 L. Quel est le taux de variation (pente) en litres par heure?
- Choices: A) 100 L/h B) 130 L/h C) 150 L/h D) 175 L/h
- Hint: Slope = (change in y) ÷ (change in x) = (y₂ − y₁) ÷ (x₂ − x₁). For example, from (1, 50) to (4, 200): (200−50)÷(4−1) = 150÷3 = 50 L/h.
- Steps:
- Step 1: (3, 180) to (7, 420). Slope = (420−180)÷(7−3) = 240÷4 = 60 L/h.
- Step 2: Subtract the litres (750 − 300), divide by time difference (5 − 2) the same way!
- Answer: 150 L/h
[Hard] Multi-Step Percent Problem
- EN: A store marks up a $200 item by 30%, then offers a 10% loyalty discount on the marked-up price. What is the final price?
- FR: Un magasin augmente le prix d'un article de 200 $ de 30 %, puis offre un rabais de fidélité de 10 % sur le prix majoré. Quel est le prix final?
- Choices: A) $226 B) $228 C) $230 D) $234
- Hint: Step 1: Find the marked-up price (original × 1.30). Step 2: Apply 10% discount (marked-up × 0.90). For example, $100 × 1.25 = $125; $125 × 0.90 = $112.50.
- Steps:
- Step 1: $150 × 1.40 = $210. Then $210 × 0.90 = $189.
- Step 2: Multiply $200 × 1.30 first, then multiply that result × 0.90!
- Answer: $234
Grade 9 Problems
[Easy] Solving a Linear Equation
- EN: Solve for x: 5x − 8 = 17
- FR: Résous pour x : 5x − 8 = 17
- Choices: A) 4 B) 5 C) 6 D) 7
- Hint: Add the constant to both sides, then divide. For example, 4x − 3 = 21: 4x = 24; x = 6.
- Steps:
- Step 1: 6x − 5 = 25. Add 5: 6x = 30. Divide: x = 5.
- Step 2: Add 8 to both sides, then divide by 5 the same way!
- Answer: 5
[Easy] Graphing — Slope-Intercept Form
- EN: What is the slope of the line y = 3x + 2?
- FR: Quel est le pente de la droite y = 3x + 2?
- Choices: A) 1 B) 2 C) 3 D) 5
- Hint: In y = mx + b, m is the slope and b is the y-intercept. For example, in y = 5x − 1, the slope is 5.
- Steps:
- Step 1: y = 7x + 4. The slope is the coefficient of x, which is 7.
- Step 2: Look at the coefficient of x in y = 3x + 2 — that number is the slope!
- Answer: 3
[Easy] Adding Polynomials
- EN: Simplify: (3x + 5) + (2x − 3)
- FR: Simplifie : (3x + 5) + (2x − 3)
- Choices: A) 4x + 2 B) 5x + 2 C) 5x + 8 D) 6x + 2
- Hint: Combine like terms — add the x terms together and the number terms together. For example, (4x + 3) + (x − 1) = 5x + 2.
- Steps:
- Step 1: (5x + 6) + (3x − 4). x terms: 5x + 3x = 8x. Numbers: 6 − 4 = 2. Answer: 8x + 2.
- Step 2: Add x terms together and constants together the same way for your problem!
- Answer: 5x + 2
[Easy] SOH-CAH-TOA — Finding a Side
- EN: In a right triangle, the angle is 30° and the hypotenuse is 10 cm. Find the opposite side. (sin 30° = 0.5)
- FR: Dans un triangle rectangle, l'angle est de 30° et l'hypoténuse est de 10 cm. Trouve le côté opposé. (sin 30° = 0,5)
- Choices: A) 3 cm B) 4 cm C) 5 cm D) 6 cm
- Hint: sin(angle) = opposite ÷ hypotenuse. Rearranging: opposite = sin(angle) × hypotenuse. For example, sin 45° × 8 = 0.707 × 8 ≈ 5.66 cm.
- Steps:
- Step 1: sin 60° = 0.866; hypotenuse = 12. Opposite = 0.866 × 12 ≈ 10.4 cm.
- Step 2: Multiply sin(30°) = 0.5 by the hypotenuse (10) the same way!
- Answer: 5 cm
[Easy] Linear Inequality
- EN: Solve: x + 6 > 10
- FR: Résous : x + 6 > 10
- Choices: A) x > 2 B) x > 3 C) x > 4 D) x > 5
- Hint: Solve inequalities just like equations — subtract from both sides. For example, x + 3 > 9: x > 6.
- Steps:
- Step 1: x + 5 > 12. Subtract 5 from both sides: x > 7.
- Step 2: Subtract 6 from both sides of your inequality the same way!
- Answer: x > 4
[Medium] Multiplying Polynomials
- EN: Expand: (x + 3)(x + 5)
- FR: Développe : (x + 3)(x + 5)
- Choices: A) x² + 7x + 15 B) x² + 8x + 15 C) x² + 8x + 12 D) x² + 6x + 15
- Hint: Use FOIL: First, Outer, Inner, Last. For example, (x + 2)(x + 4) = x² + 4x + 2x + 8 = x² + 6x + 8.
- Steps:
- Step 1: (x + 1)(x + 6). F: x²; O: 6x; I: x; L: 6. Combine: x² + 7x + 6.
- Step 2: Apply FOIL to (x + 3)(x + 5) — multiply each term pair and combine like terms!
- Answer: x² + 8x + 15
[Medium] Similar Triangles
- EN: Two similar triangles have sides in ratio 2:3. The smaller triangle has a base of 8 cm. What is the base of the larger triangle?
- FR: Deux triangles semblables ont des côtés en rapport 2:3. Le plus petit triangle a une base de 8 cm. Quelle est la base du plus grand triangle?
- Choices: A) 10 cm B) 11 cm C) 12 cm D) 14 cm
- Hint: Set up a proportion using the ratio. If smaller = 2 parts and larger = 3 parts: larger base = (3/2) × smaller. For example, smaller = 6 cm: larger = (3/2) × 6 = 9 cm.
- Steps:
- Step 1: Ratio 2:5, smaller base = 4 cm. Larger = (5/2) × 4 = 10 cm.
- Step 2: Multiply the smaller base by (3/2) to find the larger base the same way!
- Answer: 12 cm
[Medium] Systems of Equations Introduction
- EN: If x + y = 10 and x − y = 4, what is the value of x?
- FR: Si x + y = 10 et x − y = 4, quelle est la valeur de x?
- Choices: A) 5 B) 6 C) 7 D) 8
- Hint: Add the two equations together to eliminate y. For example, x + y = 8 and x − y = 2: adding gives 2x = 10; x = 5.
- Steps:
- Step 1: x + y = 12 and x − y = 4. Add: 2x = 16; x = 8.
- Step 2: Add your two equations together — y cancels out, and you can solve for x!
- Answer: 7
[Medium] Graphing — Y-Intercept
- EN: What is the y-intercept of the line y = −2x + 7?
- FR: Quel est l'ordonnée à l'origine de la droite y = −2x + 7?
- Choices: A) −7 B) −2 C) 2 D) 7
- Hint: In y = mx + b, b is the y-intercept (where the line crosses the y-axis). For example, in y = 4x − 3, the y-intercept is −3.
- Steps:
- Step 1: y = 5x + 9. The y-intercept is 9 (the b value).
- Step 2: Identify the b value in y = −2x + 7 — that's the y-intercept!
- Answer: 7
[Medium] Trigonometry — Finding an Angle
- EN: In a right triangle, the opposite side is 5 cm and hypotenuse is 10 cm. Find the angle. (sin θ = 0.5 → θ = 30°)
- FR: Dans un triangle rectangle, le côté opposé est de 5 cm et l'hypoténuse de 10 cm. Trouve l'angle. (sin θ = 0,5 → θ = 30°)
- Choices: A) 25° B) 30° C) 45° D) 60°
- Hint: sin θ = opposite ÷ hypotenuse. Find the ratio, then use the inverse sine. For example, opposite = 7, hyp = 14: sin θ = 0.5; θ = 30°.
- Steps:
- Step 1: Opposite = 6, hypotenuse = 12. sin θ = 6/12 = 0.5. So θ = 30°.
- Step 2: Divide opposite by hypotenuse (5 ÷ 10 = 0.5), then find the angle with that sine value!
- Answer: 30°
[Medium] Subtracting Polynomials
- EN: Simplify: (5x² + 3x − 2) − (2x² − x + 4)
- FR: Simplifie : (5x² + 3x − 2) − (2x² − x + 4)
- Choices: A) 3x² + 4x − 6 B) 3x² + 2x − 6 C) 3x² + 4x + 6 D) 7x² + 2x − 6
- Hint: Distribute the negative sign to all terms in the second bracket, then combine like terms. For example, (6x² + x − 1) − (2x² − 3x + 5) = 4x² + 4x − 6.
- Steps:
- Step 1: (4x² + 5x − 3) − (x² − 2x + 1). Distribute negative: 4x² + 5x − 3 − x² + 2x − 1 = 3x² + 7x − 4.
- Step 2: Flip signs on all terms in the second bracket, then combine like terms the same way!
- Answer: 3x² + 4x − 6
[Hard] Solving a Linear Inequality with Negatives
- EN: Solve: −3x + 5 ≤ 14
- FR: Résous : −3x + 5 ≤ 14
- Choices: A) x ≥ −5 B) x ≥ −4 C) x ≥ −3 D) x ≤ −3
- Hint: When you divide or multiply both sides by a negative number, FLIP the inequality sign. For example, −2x < 8: x > −4 (flip!).
- Steps:
- Step 1: −4x + 3 ≤ 11. Subtract 3: −4x ≤ 8. Divide by −4 (flip): x ≥ −2.
- Step 2: Subtract 5 from both sides, then divide by −3 and remember to flip the inequality sign!
- Answer: x ≥ −3
[Hard] Trigonometry — Angle and Side
- EN: In a right triangle, the adjacent side is 8 cm and the hypotenuse is 10 cm. What angle does this give? (cos θ = 0.8 → θ ≈ 37°)
- FR: Dans un triangle rectangle, le côté adjacent est de 8 cm et l'hypoténuse de 10 cm. Quel angle cela donne-t-il? (cos θ = 0,8 → θ ≈ 37°)
- Choices: A) 30° B) 37° C) 45° D) 53°
- Hint: cos θ = adjacent ÷ hypotenuse. Find the ratio and then find the angle using inverse cosine. For example, adjacent = 6, hyp = 10: cos θ = 0.6 → θ ≈ 53°.
- Steps:
- Step 1: Adjacent = 9, hypotenuse = 15. cos θ = 9/15 = 0.6 → θ ≈ 53°.
- Step 2: Divide 8 by 10 to get the cosine ratio, then match it to the given angle!
- Answer: 37°
[Hard] Polynomial Multiplication
- EN: Expand and simplify: (2x + 3)(3x − 4)
- FR: Développe et simplifie : (2x + 3)(3x − 4)
- Choices: A) 6x² − x − 12 B) 6x² + x − 12 C) 6x² − x + 12 D) 5x² + x − 12
- Hint: Use FOIL on binomials with coefficients. For example, (3x + 2)(2x − 5): F=6x², O=−15x, I=4x, L=−10. Combine: 6x² − 11x − 10.
- Steps:
- Step 1: (4x + 1)(2x − 3). F: 8x². O: −12x. I: 2x. L: −3. Combine: 8x² − 10x − 3.
- Step 2: Apply FOIL to (2x + 3)(3x − 4) and combine the like terms!
- Answer: 6x² + x − 12
[Hard] Statistics — Interpreting Data
- EN: A set of test scores has a mean of 78 and a median of 85. What can you conclude?
- FR: Un ensemble de résultats d'examen a une moyenne de 78 et une médiane de 85. Que peut-on conclure?
- Choices: A) Most scores are above the mean B) The data is symmetric C) There are likely some low scores pulling the mean down D) The mode equals the mean
- Hint: When mean < median, the distribution is skewed left — a few low values pull the mean down. For example, if most students scored 85+ but a few scored very low, mean < median.
- Steps:
- Step 1: Imagine scores: 30, 80, 85, 88, 90. Mean ≈ 74.6; median = 85. The one low score (30) drags the mean below the median.
- Step 2: Think about what kind of data makes the mean smaller than the median — what pulls a mean down?
- Answer: There are likely some low scores pulling the mean down
Grade 10 Problems
[Easy] Factoring Quadratics
- EN: Factor: x² + 7x + 12
- FR: Factorise : x² + 7x + 12
- Choices: A) (x + 3)(x + 4) B) (x + 2)(x + 6) C) (x + 1)(x + 12) D) (x + 4)(x + 4)
- Hint: Find two numbers that multiply to the constant and add to the middle coefficient. For example, x² + 5x + 6: 2 × 3 = 6 and 2 + 3 = 5 → (x + 2)(x + 3).
- Steps:
- Step 1: x² + 9x + 20. Find two numbers: ? × ? = 20 and ? + ? = 9. Try 4 and 5: 4 × 5 = 20, 4 + 5 = 9. → (x + 4)(x + 5).
- Step 2: Find two numbers that multiply to 12 and add to 7 — those go in your factors!
- Answer: (x + 3)(x + 4)
[Easy] Trigonometry — Finding a Side
- EN: In a right triangle, angle A = 45°, adjacent side = 6 cm. Find the opposite side. (tan 45° = 1)
- FR: Dans un triangle rectangle, angle A = 45°, côté adjacent = 6 cm. Trouve le côté opposé. (tan 45° = 1)
- Choices: A) 4 cm B) 5 cm C) 6 cm D) 7 cm
- Hint: tan(angle) = opposite ÷ adjacent. Rearrange: opposite = tan(angle) × adjacent. For example, tan 30° ≈ 0.577; adjacent = 10: opposite ≈ 5.77.
- Steps:
- Step 1: tan 60° ≈ 1.73; adjacent = 4. Opposite = 1.73 × 4 ≈ 6.93 cm.
- Step 2: Multiply tan(45°) × adjacent (6) the same way — and remember tan 45° = 1!
- Answer: 6 cm
[Easy] Systems of Equations — Substitution
- EN: Solve: y = 2x and x + y = 9. What is x?
- FR: Résous : y = 2x et x + y = 9. Quelle est la valeur de x?
- Choices: A) 1 B) 2 C) 3 D) 4
- Hint: Substitute the first equation into the second. For example, y = 3x; x + y = 8 → x + 3x = 8 → 4x = 8 → x = 2.
- Steps:
- Step 1: y = 4x; x + y = 10. Substitute: x + 4x = 10 → 5x = 10 → x = 2.
- Step 2: Replace y with 2x in the second equation, combine like terms, then solve for x!
- Answer: 3
[Easy] Volume of a Cylinder
- EN: A cylindrical water bottle has radius 3 cm and height 12 cm. What is its volume? (Use π ≈ 3.14)
- FR: Une bouteille d'eau cylindrique a un rayon de 3 cm et une hauteur de 12 cm. Quel est son volume? (Utilise π ≈ 3,14)
- Choices: A) 288.00 cm³ B) 301.44 cm³ C) 339.12 cm³ D) 356.00 cm³
- Hint: Volume of cylinder = π × r² × h. For example, r = 2, h = 5: V = 3.14 × 4 × 5 = 62.8 cm³.
- Steps:
- Step 1: r = 4, h = 7. V = 3.14 × 16 × 7 = 3.14 × 112 = 351.68 cm³.
- Step 2: Square the radius (3² = 9), multiply by π (3.14) and height (12)!
- Answer: 339.12 cm³
[Easy] Circle Geometry — Circumference
- EN: What is the circumference of a circle with diameter 10 cm? (Use π ≈ 3.14)
- FR: Quelle est la circonférence d'un cercle de diamètre 10 cm? (Utilise π ≈ 3,14)
- Choices: A) 28.26 cm B) 30.14 cm C) 31.40 cm D) 34.54 cm
- Hint: Circumference = π × diameter. For example, diameter = 8: C = 3.14 × 8 = 25.12 cm.
- Steps:
- Step 1: Diameter = 6 cm. C = 3.14 × 6 = 18.84 cm.
- Step 2: Multiply π (3.14) × diameter (10) the same way!
- Answer: 31.40 cm
[Medium] Completing the Square
- EN: Solve by completing the square: x² + 6x = 7
- FR: Résous en complétant le carré : x² + 6x = 7
- Choices: A) x = 1 or x = −7 B) x = 2 or x = −8 C) x = 3 or x = −9 D) x = 1 or x = −8
- Hint: Add (b/2)² to both sides. For example, x² + 4x = 5: add 4 → (x+2)² = 9 → x = 1 or x = −5.
- Steps:
- Step 1: x² + 8x = 9. Add (4)² = 16: (x+4)² = 25. x+4 = ±5. x = 1 or x = −9.
- Step 2: Add (6/2)² = 9 to both sides, write as a perfect square, then solve!
- Answer: x = 1 or x = −7
[Medium] Quadratic Formula
- EN: Use the quadratic formula to solve: x² − 5x + 6 = 0
- FR: Utilise la formule quadratique pour résoudre : x² − 5x + 6 = 0
- Choices: A) x = 1 or x = 6 B) x = 2 or x = 3 C) x = −2 or x = −3 D) x = 1 or x = 5
- Hint: x = (−b ± √(b²−4ac)) ÷ 2a. For example, x² − 7x + 12: a=1, b=−7, c=12. Discriminant = 49−48=1. x = (7±1)÷2: x=4 or x=3.
- Steps:
- Step 1: x² − 6x + 8 = 0. a=1, b=−6, c=8. Disc = 36−32=4. x = (6±2)/2. x=4 or x=2.
- Step 2: Identify a=1, b=−5, c=6; compute discriminant and apply the formula!
- Answer: x = 2 or x = 3
[Medium] Circle Geometry — Arc and Sector
- EN: A circle has radius 6 cm. A sector has a central angle of 90°. What is the area of the sector? (Use π ≈ 3.14)
- FR: Un cercle a un rayon de 6 cm. Un secteur a un angle central de 90°. Quelle est l'aire du secteur? (Utilise π ≈ 3,14)
- Choices: A) 25.14 cm² B) 28.26 cm² C) 31.40 cm² D) 34.54 cm²
- Hint: Area of sector = (angle/360) × π × r². For example, 60° sector with r=4: (60/360) × 3.14 × 16 = (1/6) × 50.24 ≈ 8.37 cm².
- Steps:
- Step 1: 45° sector, r=8. (45/360) × 3.14 × 64 = 0.125 × 200.96 = 25.12 cm².
- Step 2: Use (90/360) × 3.14 × 36 — simplify 90/360 to 1/4 first!
- Answer: 28.26 cm²
[Medium] Surface Area of a Cone
- EN: A cone has radius 5 cm and slant height 13 cm. What is its total surface area? (Use π ≈ 3.14)
- FR: Un cône a un rayon de 5 cm et une hauteur oblique de 13 cm. Quelle est son aire de surface totale? (Utilise π ≈ 3,14)
- Choices: A) 270.04 cm² B) 280.14 cm² C) 282.60 cm² D) 294.00 cm²
- Hint: SA of cone = π r² + π r l (base + lateral). For example, r=3, l=5: SA = 3.14×9 + 3.14×3×5 = 28.26 + 47.10 = 75.36 cm².
- Steps:
- Step 1: r=4, l=10. SA = 3.14×16 + 3.14×4×10 = 50.24 + 125.6 = 175.84 cm².
- Step 2: Find π×r² for the base and π×r×l for the side, then add them together!
- Answer: 282.60 cm²
[Medium] Systems — Elimination
- EN: Solve using elimination: 2x + 3y = 16 and 2x − y = 4. What is y?
- FR: Résous par élimination : 2x + 3y = 16 et 2x − y = 4. Quelle est la valeur de y?
- Choices: A) 2 B) 3 C) 4 D) 5
- Hint: Subtract the equations to eliminate x. For example, 3x + 2y = 11 and 3x − y = 5: subtracting gives 3y = 6; y = 2.
- Steps:
- Step 1: 4x + y = 13 and 4x − 2y = 7. Subtract: 3y = 6; y = 2.
- Step 2: Subtract the second equation from the first to eliminate 2x, then solve for y!
- Answer: 3
[Medium] Trigonometry — Angle of Elevation
- EN: A tree casts a shadow of 24 m. The angle of elevation to the top is 30°. How tall is the tree? (tan 30° ≈ 0.577)
- FR: Un arbre projette une ombre de 24 m. L'angle d'élévation vers le sommet est de 30°. Quelle est la hauteur de l'arbre? (tan 30° ≈ 0,577)
- Choices: A) 12.4 m B) 13.8 m C) 14.5 m D) 15.2 m
- Hint: tan(angle) = opposite ÷ adjacent. opposite = tan(angle) × adjacent. For example, tan 45° × 18 = 1 × 18 = 18 m tall.
- Steps:
- Step 1: Shadow = 30 m, angle = 30°. Height = tan 30° × 30 = 0.577 × 30 = 17.31 m.
- Step 2: Multiply tan(30°) ≈ 0.577 by the shadow length (24) the same way!
- Answer: 13.8 m
[Hard] Quadratic — Word Problem
- EN: A ball is thrown upward. Its height is modelled by h = −5t² + 20t. When does the ball hit the ground? (h = 0)
- FR: Un ballon est lancé vers le haut. Sa hauteur est modélisée par h = −5t² + 20t. Quand le ballon touche-t-il le sol? (h = 0)
- Choices: A) t = 2 s B) t = 3 s C) t = 4 s D) t = 5 s
- Hint: Set h = 0 and factor: −5t² + 20t = 0 → −5t(t − ?) = 0. For example, −4t² + 16t = 0: −4t(t − 4) = 0 → t = 0 or t = 4.
- Steps:
- Step 1: −3t² + 12t = 0. Factor: −3t(t − 4) = 0. t = 0 or t = 4. Ball hits ground at t = 4.
- Step 2: Factor out −5t from your equation, set each factor to zero, and choose the non-zero time!
- Answer: t = 4 s
[Hard] Circle Geometry Theorem
- EN: A chord of length 16 cm is 6 cm from the centre of a circle. What is the radius of the circle?
- FR: Une corde de 16 cm de longueur est à 6 cm du centre d'un cercle. Quel est le rayon du cercle?
- Choices: A) 8 cm B) 9 cm C) 10 cm D) 11 cm
- Hint: A perpendicular from the centre bisects the chord. Use the Pythagorean theorem: r² = (half chord)² + distance². For example, chord = 12 (half = 6), distance = 8: r² = 36 + 64 = 100; r = 10.
- Steps:
- Step 1: Chord = 24 (half = 12), distance = 5. r² = 144 + 25 = 169. r = 13 cm.
- Step 2: Half your chord = 8 cm. Use 8² + 6² = r² to find the radius!
- Answer: 10 cm
[Hard] 3D Surface Area — Composite Shape
- EN: A shape is made of a rectangular prism (4 × 3 × 5 cm) with a cube (side 2 cm) placed on top. What is the exposed surface area of the combined shape? (Subtract the overlapping 2×2 face twice.)
- FR: Une forme est composée d'un prisme rectangulaire (4 × 3 × 5 cm) avec un cube (côté 2 cm) placé sur le dessus. Quelle est l'aire de surface exposée de la forme combinée? (Soustrais la face de chevauchement 2 × 2 deux fois.)
- Choices: A) 118 cm² B) 122 cm² C) 126 cm² D) 130 cm²
- Hint: SA combined = SA of prism + SA of cube − 2 × (area of overlapping face). The two surfaces that touch are hidden.
- Steps:
- Step 1: SA of prism (4×3×5): 2(12+20+15) = 2(47) = 94 cm². SA of cube (side 2): 6 × 4 = 24 cm². Overlap: 2 × 4 = 8 cm². Combined: 94 + 24 − 8 = 110 cm².
- Step 2: Use the same method with your dimensions — find each SA, then subtract both overlapping faces!
- Answer: 118 cm²
[Hard] Systems of Equations — Word Problem
- EN: Two canoes rent for different prices. Canoe A costs $15/hour, Canoe B costs $25/hour. For 4 hours, the total cost for both canoes is $140. How many hours did Canoe A rent?
- FR: Deux canots se louent à des prix différents. Le canot A coûte 15 $/heure, le canot B coûte 25 $/heure. Pour 4 heures au total, le coût des deux canots est de 140 $. Combien d'heures le canot A a-t-il été loué?
- Choices: A) 1 hour B) 2 hours C) 3 hours D) 4 hours
- Hint: Let a = hours for A, b = hours for B. Set up: a + b = 4 and 15a + 25b = 140. Solve by substitution or elimination.
- Steps:
- Step 1: a + b = 3, 10a + 20b = 40. From equation 1: a = 3 − b. Substitute: 10(3−b) + 20b = 40 → 30 − 10b + 20b = 40 → 10b = 10 → b = 1. So a = 2.
- Step 2: Express a in terms of b from the first equation, substitute into the second, and solve!
- Answer: 2 hours
Grade 11 Problems
[Easy] Exponential Function
- EN: A bacteria colony doubles every hour. It starts with 50 bacteria. How many are there after 3 hours?
- FR: Une colonie de bactéries double chaque heure. Elle commence avec 50 bactéries. Combien y en a-t-il après 3 heures?
- Choices: A) 300 B) 350 C) 400 D) 450
- Hint: Exponential growth: amount = initial × (growth factor)^time. For example, starts at 30, doubles: after 3 hours = 30 × 2³ = 30 × 8 = 240.
- Steps:
- Step 1: Start = 20, doubles every hour. After 4 hours: 20 × 2⁴ = 20 × 16 = 320.
- Step 2: Multiply 50 × 2³ the same way — calculate 2³ first, then multiply by the initial amount!
- Answer: 400
[Easy] Arithmetic Sequence
- EN: The sequence is 5, 11, 17, 23, ... What is the 6th term?
- FR: La suite est 5, 11, 17, 23, ... Quel est le 6e terme?
- Choices: A) 33 B) 35 C) 37 D) 39
- Hint: In an arithmetic sequence, add the common difference each time. Find d first. For example, 4, 9, 14, 19: d=5. 6th term = 4 + 5×5 = 29.
- Steps:
- Step 1: Sequence: 3, 8, 13, 18. d = 5. 6th term = 3 + 5×5 = 3 + 25 = 28.
- Step 2: Find d (11 − 5 = 6), then use: t₆ = first term + 5 × d!
- Answer: 35
[Easy] Compound Interest
- EN: You invest $1,000 at 5% annual compound interest for 2 years. What is the final amount? (Use A = P(1 + r)^t)
- FR: Tu investis 1 000 $ à un taux d'intérêt composé annuel de 5 % pendant 2 ans. Quel est le montant final? (Utilise A = P(1 + r)^t)
- Choices: A) $1,100.25 B) $1,102.50 C) $1,102.75 D) $1,105.00
- Hint: A = P(1 + r)^t. For example, P=$500, r=0.10, t=2: A = 500 × (1.10)² = 500 × 1.21 = $605.
- Steps:
- Step 1: P=$800, r=0.05, t=2. A = 800 × (1.05)² = 800 × 1.1025 = $882.
- Step 2: Apply the same formula — 1000 × (1.05)² = 1000 × 1.1025!
- Answer: $1,102.50
[Easy] Quadratic Function — Vertex
- EN: What is the vertex of y = (x − 3)² + 4?
- FR: Quel est le sommet de y = (x − 3)² + 4?
- Choices: A) (−3, 4) B) (3, −4) C) (3, 4) D) (−3, −4)
- Hint: In vertex form y = (x − h)² + k, the vertex is (h, k). For example, y = (x − 2)² + 5: vertex is (2, 5).
- Steps:
- Step 1: y = (x − 6)² + 1. Vertex is (6, 1). h = 6, k = 1.
- Step 2: Identify h and k in your equation — remember to flip the sign of h!
- Answer: (3, 4)
[Easy] Logarithm Introduction
- EN: Solve: log₂(8) = ?
- FR: Résous : log₂(8) = ?
- Choices: A) 2 B) 3 C) 4 D) 8
- Hint: logₐ(b) = c means aᶜ = b. Ask: 2 to what power equals 8? For example, log₂(16): 2⁴ = 16, so log₂(16) = 4.
- Steps:
- Step 1: log₃(27): 3³ = 27. So log₃(27) = 3.
- Step 2: Ask: 2 to what power equals 8? That exponent is your answer!
- Answer: 3
[Medium] Geometric Sequence
- EN: A geometric sequence starts at 6 with ratio 3. What is the 4th term?
- FR: Une suite géométrique commence à 6 avec un rapport de 3. Quel est le 4e terme?
- Choices: A) 54 B) 108 C) 162 D) 486
- Hint: tₙ = first term × r^(n−1). For example, first = 4, r = 2, 4th term: 4 × 2³ = 32.
- Steps:
- Step 1: First = 5, r = 3, 4th term: 5 × 3³ = 5 × 27 = 135.
- Step 2: Multiply 6 × 3³ the same way — calculate 3³ first, then multiply by 6!
- Answer: 162
[Medium] Logarithm Laws
- EN: Simplify: log(100) + log(10)
- FR: Simplifie : log(100) + log(10)
- Choices: A) 2 B) 3 C) 4 D) 5
- Hint: log(a) + log(b) = log(a × b). Also, log₁₀(10ⁿ) = n. For example, log(1000) + log(100) = log(100,000) = 5.
- Steps:
- Step 1: log(10) + log(100) = log(1000) = log(10³) = 3.
- Step 2: Add your logs by combining: log(100 × 10) = log(1000) = ?
- Answer: 3
[Medium] Annuity — Future Value
- EN: You deposit $200 per month for 12 months at 0% interest. How much have you saved?
- FR: Tu déposes 200 $ par mois pendant 12 mois à un taux d'intérêt de 0 %. Combien as-tu épargné?
- Choices: A) $2,000 B) $2,200 C) $2,400 D) $2,600
- Hint: At 0% interest, the total is simply the monthly payment × number of months. For example, $150/month × 10 months = $1,500.
- Steps:
- Step 1: $300/month × 8 months = $2,400.
- Step 2: Multiply $200 by 12 months the same way!
- Answer: $2,400
[Medium] Trigonometric Identity
- EN: Simplify using an identity: sin²θ + cos²θ
- FR: Simplifie à l'aide d'une identité : sin²θ + cos²θ
- Choices: A) 0 B) 2 C) sin θ D) 1
- Hint: This is the Pythagorean identity — one of the most important in trigonometry! For any angle θ, sin²θ + cos²θ always equals the same value. Think of a unit circle!
- Steps:
- Step 1: On a unit circle, the point (cos θ, sin θ) is always on a circle of radius 1. By the Pythagorean theorem: cos²θ + sin²θ = 1² = 1.
- Step 2: The Pythagorean identity tells us that sin²θ + cos²θ always equals which value?
- Answer: 1
[Medium] Exponential Equation
- EN: Solve: 2^x = 32
- FR: Résous : 2^x = 32
- Choices: A) 4 B) 5 C) 6 D) 16
- Hint: Rewrite both sides with the same base. For example, 3^x = 81: 81 = 3⁴, so x = 4.
- Steps:
- Step 1: 2^x = 16. 16 = 2⁴. So x = 4.
- Step 2: Express 32 as a power of 2 the same way — 32 = 2^? — and that exponent is x!
- Answer: 5
[Medium] Arithmetic Series Sum
- EN: Find the sum of the first 10 terms of the sequence: 3, 7, 11, 15, ...
- FR: Trouve la somme des 10 premiers termes de la suite : 3, 7, 11, 15, ...
- Choices: A) 180 B) 190 C) 200 D) 210
- Hint: Sum = n/2 × (first + last term). First find the 10th term: t₁₀ = 3 + 9 × 4 = 39. Then Sₙ = 10/2 × (3 + 39).
- Steps:
- Step 1: Sequence 2, 6, 10, 14. d=4, t₈ = 2 + 7×4 = 30. S₈ = 8/2 × (2+30) = 4 × 32 = 128.
- Step 2: Find the 10th term first, then use S₁₀ = 10/2 × (first + last)!
- Answer: 210
[Hard] Logarithmic Equation
- EN: Solve: log₃(x) + log₃(x − 2) = log₃(8)
- FR: Résous : log₃(x) + log₃(x − 2) = log₃(8)
- Choices: A) x = 3 B) x = 4 C) x = 5 D) x = 6
- Hint: Use log(a) + log(b) = log(ab). Then set the arguments equal: x(x−2) = 8. Solve the resulting quadratic and reject negative solutions.
- Steps:
- Step 1: log₂(x) + log₂(x−1) = log₂(6). → x(x−1) = 6 → x² − x − 6 = 0 → (x−3)(x+2)=0 → x=3 (reject −2).
- Step 2: Combine the logs on the left, set x(x−2) = 8, solve the quadratic, and reject any negative answer!
- Answer: x = 4
[Hard] Compound Interest — Finding Time
- EN: How many years does it take for $500 to grow to $1,000 at 10% compound interest per year? (Use 2 = 1.10^t; t ≈ 7.27, round to nearest year)
- FR: Combien d'années faut-il pour que 500 $ deviennent 1 000 $ à un taux d'intérêt composé de 10 % par an? (Utilise 2 = 1,10^t; t ≈ 7,27, arrondi à l'année la plus proche)
- Choices: A) 6 years B) 7 years C) 8 years D) 9 years
- Hint: A = P(1+r)^t → 1000 = 500(1.10)^t → 2 = 1.10^t → t = log(2)/log(1.10). Use logarithms to solve for t.
- Steps:
- Step 1: $300 grows to $600 at 8%. 2 = 1.08^t. t = log(2)/log(1.08) ≈ 0.301/0.0334 ≈ 9.01 years.
- Step 2: Apply t = log(2)/log(1.10) ≈ 0.301/0.0414 ≈ 7.27, so round to the nearest whole year!
- Answer: 7 years
[Hard] Trigonometric Equation
- EN: Solve for θ in [0°, 360°]: 2sin θ − 1 = 0
- FR: Résous pour θ dans [0°, 360°] : 2sin θ − 1 = 0
- Choices: A) 30° and 150° B) 45° and 135° C) 60° and 120° D) 30° and 330°
- Hint: Isolate sin θ = 1/2. Then find angles where sine equals 1/2 in [0°, 360°]. Sine is positive in Q1 and Q2. For example, sin θ = √3/2 → θ = 60° and 120°.
- Steps:
- Step 1: sin θ = 1/2. Reference angle: sin⁻¹(0.5) = 30°. Positive in Q1 and Q2: θ = 30° and 150°.
- Step 2: Isolate sin θ from your equation, find the reference angle, then apply the CAST rule!
- Answer: 30° and 150°
[Hard] Geometric Series Sum
- EN: Find the sum of the first 5 terms of the geometric series: 4, 12, 36, 108, ...
- FR: Trouve la somme des 5 premiers termes de la série géométrique : 4, 12, 36, 108, ...
- Choices: A) 484 B) 484 C) 484 D) 484
- Hint: Sₙ = a(rⁿ − 1)/(r − 1). Here a = 4, r = 3, n = 5: S₅ = 4(3⁵ − 1)/(3−1) = 4(243−1)/2 = 4×242/2 = 4×121 = 484.
- Steps:
- Step 1: a=2, r=3, n=4. S₄ = 2(3⁴−1)/(3−1) = 2(80)/2 = 80.
- Step 2: Apply Sₙ = a(rⁿ−1)/(r−1) with a=4, r=3, n=5 — compute 3⁵ = 243 first!
- Answer: 484
Grade 12 Problems
[Easy] Permutations
- EN: How many ways can 5 different books be arranged on a shelf?
- FR: De combien de façons peut-on ranger 5 livres différents sur une étagère?
- Choices: A) 60 B) 100 C) 120 D) 150
- Hint: Arrangements of n distinct objects = n! For example, 4 books: 4! = 4 × 3 × 2 × 1 = 24 ways.
- Steps:
- Step 1: 3 books: 3! = 3 × 2 × 1 = 6 ways.
- Step 2: Calculate 5! = 5 × 4 × 3 × 2 × 1 the same way!
- Answer: 120
[Easy] Combinations
- EN: How many ways can you choose 2 students from a group of 6?
- FR: De combien de façons peut-on choisir 2 élèves dans un groupe de 6?
- Choices: A) 12 B) 15 C) 18 D) 30
- Hint: C(n,r) = n! ÷ (r! × (n−r)!). For example, C(5,2) = 5!/(2!×3!) = 120/(2×6) = 10.
- Steps:
- Step 1: C(4,2) = 4!/(2!×2!) = 24/(2×2) = 6 ways.
- Step 2: Apply C(6,2) = 6!/(2!×4!) — calculate and simplify!
- Answer: 15
[Easy] Polynomial — Identifying Degree
- EN: What is the degree of the polynomial: 4x³ − 7x² + 2x − 9?
- FR: Quel est le degré du polynôme : 4x³ − 7x² + 2x − 9?
- Choices: A) 1 B) 2 C) 3 D) 4
- Hint: The degree is the highest exponent on a variable. For example, 5x⁴ + 3x − 8 has degree 4.
- Steps:
- Step 1: 6x² + x⁵ − 3. The highest exponent is 5 — degree = 5.
- Step 2: Find the highest exponent in your polynomial — that's the degree!
- Answer: 3
[Easy] Derivative — Power Rule
- EN: Find the derivative of f(x) = x⁴.
- FR: Trouve la dérivée de f(x) = x⁴.
- Choices: A) x³ B) 4x³ C) 4x D) x⁵
- Hint: Power rule: if f(x) = xⁿ, then f'(x) = n·xⁿ⁻¹. For example, f(x) = x³ → f'(x) = 3x².
- Steps:
- Step 1: f(x) = x⁵. f'(x) = 5x⁴.
- Step 2: Bring the exponent (4) down as a coefficient and reduce the power by 1!
- Answer: 4x³
[Easy] Rational Function — Domain
- EN: What value of x is NOT in the domain of f(x) = 1/(x − 5)?
- FR: Quelle valeur de x n'est PAS dans le domaine de f(x) = 1/(x − 5)?
- Choices: A) x = 0 B) x = 1 C) x = 5 D) x = −5
- Hint: A rational function is undefined when its denominator equals zero. For example, f(x) = 1/(x + 3): denominator = 0 when x = −3.
- Steps:
- Step 1: f(x) = 1/(x − 8). Set denominator = 0: x − 8 = 0 → x = 8. Domain excludes x = 8.
- Step 2: Set x − 5 = 0 and solve — that value is excluded from the domain!
- Answer: x = 5
[Medium] Derivative — Product Rule
- EN: Find the derivative of f(x) = x² · (3x + 1).
- FR: Trouve la dérivée de f(x) = x² · (3x + 1).
- Choices: A) 9x² + 2x B) 9x² + 4x C) 6x² + 2x D) 6x² + 3x
- Hint: Product rule: (uv)' = u'v + uv'. For example, f(x) = x³·(2x−1): u=x³, v=(2x−1); u'=3x², v'=2. f'(x) = 3x²(2x−1) + x³(2) = 6x³−3x²+2x³ = 8x³−3x².
- Steps:
- Step 1: f(x) = x²·(4x+3). u=x², u'=2x; v=(4x+3), v'=4. f'(x) = 2x(4x+3)+x²(4) = 8x²+6x+4x² = 12x²+6x.
- Step 2: Apply product rule to x²·(3x+1) — find u', v', then substitute into u'v + uv'!
- Answer: 9x² + 2x
[Medium] Probability Distribution
- EN: A fair coin is flipped 3 times. What is the probability of getting exactly 2 heads?
- FR: On lance une pièce de monnaie 3 fois. Quelle est la probabilité d'obtenir exactement 2 faces?
- Choices: A) 1/4 B) 3/8 C) 1/2 D) 5/8
- Hint: Use combinations. P(exactly k heads in n flips) = C(n,k) × (1/2)^n. For example, P(1 head in 3 flips) = C(3,1) × (1/2)³ = 3/8.
- Steps:
- Step 1: P(2 heads in 4 flips) = C(4,2) × (1/2)⁴ = 6 × 1/16 = 6/16 = 3/8.
- Step 2: Calculate C(3,2) × (1/2)³ the same way — C(3,2)=3 and (1/2)³ = 1/8!
- Answer: 3/8
[Medium] Vector Introduction
- EN: Vector a = (3, −1) and vector b = (−2, 4). What is a + b?
- FR: Le vecteur a = (3, −1) et le vecteur b = (−2, 4). Quel est a + b?
- Choices: A) (1, 3) B) (1, −3) C) (5, 3) D) (5, −5)
- Hint: Add vectors component by component. For example, (4, 2) + (−1, 5) = (4+(−1), 2+5) = (3, 7).
- Steps:
- Step 1: (6, −3) + (−4, 7) = (6+(−4), −3+7) = (2, 4).
- Step 2: Add the x-components and y-components of your vectors separately the same way!
- Answer: (1, 3)
[Medium] Rational Function — Asymptotes
- EN: What is the vertical asymptote of f(x) = (x + 2)/(x − 4)?
- FR: Quelle est l'asymptote verticale de f(x) = (x + 2)/(x − 4)?
- Choices: A) x = −2 B) x = 2 C) x = 4 D) x = −4
- Hint: Vertical asymptote occurs where denominator = 0 (and numerator ≠ 0). For example, f(x) = 3/(x+6): vertical asymptote at x = −6.
- Steps:
- Step 1: f(x) = (x−1)/(x+3). Set denominator = 0: x + 3 = 0 → x = −3. Vertical asymptote at x = −3.
- Step 2: Set x − 4 = 0 and solve to find the vertical asymptote!
- Answer: x = 4
[Medium] Derivative — Rate of Change
- EN: A car's position is s(t) = t³ − 3t cm after t seconds. What is the velocity at t = 2?
- FR: La position d'une voiture est s(t) = t³ − 3t cm après t secondes. Quelle est la vitesse au temps t = 2?
- Choices: A) 5 cm/s B) 7 cm/s C) 9 cm/s D) 11 cm/s
- Hint: Velocity = derivative of position. Use power rule: s'(t) = 3t² − 3. Then evaluate at t = 2.
- Steps:
- Step 1: s(t) = t³ − 5t. s'(t) = 3t² − 5. At t=3: 3(9)−5 = 27−5 = 22 cm/s.
- Step 2: Find s'(t) using the power rule, then substitute t = 2 to get the velocity!
- Answer: 9 cm/s
[Medium] Permutation — With Restriction
- EN: How many 3-letter arrangements can be made from the letters A, B, C, D if no letter repeats?
- FR: Combien d'arrangements de 3 lettres peut-on faire avec les lettres A, B, C, D si aucune lettre ne se répète?
- Choices: A) 12 B) 18 C) 24 D) 36
- Hint: Permutation P(n,r) = n!/(n−r)!. For example, P(5,3) = 5!/(5−3)! = 5×4×3 = 60.
- Steps:
- Step 1: P(5,2) = 5×4 = 20.
- Step 2: Calculate P(4,3) = 4 × 3 × 2 the same way!
- Answer: 24
[Hard] Polynomial Division
- EN: Divide (x³ − 3x² + 4) ÷ (x − 2) using long division. What is the quotient?
- FR: Divise (x³ − 3x² + 4) ÷ (x − 2) par division longue. Quel est le quotient?
- Choices: A) x² − x − 2 B) x² − x + 2 C) x² + x − 2 D) x² − 2x − 1
- Hint: In polynomial long division, divide the leading term, multiply back, subtract, and repeat. For example, (x³ + x² − 4x − 4) ÷ (x+2) = x² − x − 2.
- Steps:
- Step 1: (x³ − 5x² + 6x) ÷ (x−2). x³÷x = x². x²(x−2)=x³−2x². Subtract: −3x²+6x. −3x²÷x=−3x. −3x(x−2)=−3x²+6x. Subtract: 0. Quotient: x²−3x.
- Step 2: Start by dividing x³ ÷ x = x², multiply x²(x−2), subtract, and continue the process!
- Answer: x² − x − 2
[Hard] Vector Dot Product
- EN: Find the dot product of u = (4, −2) and v = (3, 5).
- FR: Trouve le produit scalaire de u = (4, −2) et v = (3, 5).
- Choices: A) 2 B) 4 C) 6 D) 8
- Hint: Dot product = u₁v₁ + u₂v₂. For example, (2, 3)·(4, −1) = 8 + (−3) = 5.
- Steps:
- Step 1: (5, −3)·(2, 4) = 5×2 + (−3)×4 = 10 − 12 = −2.
- Step 2: Multiply matching components (4×3 and −2×5), then add them together!
- Answer: 2
[Hard] Normal Distribution
- EN: In a normal distribution, 68% of data falls within 1 standard deviation of the mean. If the mean is 75 and SD is 10, what range contains 68% of the data?
- FR: Dans une distribution normale, 68 % des données se trouvent à 1 écart-type de la moyenne. Si la moyenne est 75 et l'écart-type est 10, quelle plage contient 68 % des données?
- Choices: A) 55 to 95 B) 60 to 90 C) 65 to 85 D) 70 to 80
- Hint: 68% range = (mean − 1 SD) to (mean + 1 SD). For example, mean=50, SD=8: 50−8=42 to 50+8=58.
- Steps:
- Step 1: Mean = 100, SD = 15. Range = 100−15 to 100+15 = 85 to 115.
- Step 2: Subtract 1 SD from the mean for the lower bound, add 1 SD for the upper bound!
- Answer: 65 to 85
[Hard] Derivative Application — Maximum
- EN: A farmer has 40 m of fencing to enclose a rectangular garden along a wall (one side is the wall, needing no fence). What width (x) maximizes area? f(x) = x(40 − 2x). Find the x that gives maximum area.
- FR: Un fermier a 40 m de clôture pour enclore un jardin rectangulaire le long d'un mur (un côté est le mur). Quelle largeur (x) maximise l'aire? f(x) = x(40 − 2x). Trouve la valeur de x qui maximise l'aire.
- Choices: A) x = 5 m B) x = 8 m C) x = 10 m D) x = 15 m
- Hint: Expand f(x), then take f'(x) and set it to 0. For example, f(x) = x(30−2x) = 30x−2x². f'(x)=30−4x=0 → x=7.5.
- Steps:
- Step 1: f(x) = x(20−2x) = 20x−2x². f'(x)=20−4x=0 → 4x=20 → x=5.
- Step 2: Expand your function to 40x−2x², take the derivative, set it to 0, and solve for x!
- Answer: x = 10 m
Today's Encouragement
Every problem you try today builds the confidence you will carry forward forever.
A Story of Kindness
Anika noticed her neighbour, Mr. Bouchard, struggling to carry heavy grocery bags up his snowy front steps in Ottawa. She put on her boots and ran over to help him carry the bags inside. Mr. Bouchard smiled and thanked her warmly, saying it made his whole day better. Anika walked home feeling proud, knowing that small acts of kindness can make a big difference.
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