Math Trivia Questions for Kids: Fun Questions & Answers
These math trivia questions for kids turn number practice into a quick game. The set is aimed mainly at ages 6–12 and moves from counting and multiplication to fractions, geometry, measurement and a final challenge round.
For more kid-friendly quizzes, try our trivia questions for kids, science trivia for kids and the Trivia hub.
How to Play
- Read one question at a time and give players a short thinking window.
- Award 1 point for each correct answer.
- For younger kids, allow scratch paper or counters.
- Use the challenge round as a tie-breaker or bonus round.
Numbers & Counting
Q1. What is 12 + 8?
Answer: 20. Why: Adding 12 and 8 gives 20.
Q2. What is 50 – 17?
Answer: 33. Why: Subtracting 17 from 50 leaves 33.
Q3. What number comes after 999?
Answer: 1,000. Why: One more than 999 is 1,000.
Q4. Which number is even: 17 or 18?
Answer: 18. Why: Even numbers are divisible by 2.
Q5. What is the value of the digit 7 in 372?
Answer: 70. Why: The 7 is in the tens place.
Q6. What is half of 100?
Answer: 50. Why: 100 divided by 2 is 50.
Q7. What is double 24?
Answer: 48. Why: 24 + 24 equals 48.
Q8. What number does the Roman numeral X represent?
Answer: 10. Why: X is the Roman numeral for ten.
Multiplication & Division
Q9. What is 7 × 6?
Answer: 42. Why: Seven groups of six make 42.
Q10. What is 81 ÷ 9?
Answer: 9. Why: Nine times nine is 81.
Q11. What is 12 × 12?
Answer: 144. Why: Twelve groups of twelve make 144.
Q12. What is 100 ÷ 4?
Answer: 25. Why: Four groups of 25 make 100.
Q13. If 5 bags each hold 8 marbles, how many marbles are there?
Answer: 40. Why: 5 × 8 = 40.
Q14. What is 9 × 7?
Answer: 63. Why: Nine groups of seven make 63.
Q15. What is 72 ÷ 8?
Answer: 9. Why: Eight times nine is 72.
Q16. What is 25 × 4?
Answer: 100. Why: Four groups of 25 make 100.
Fractions & Decimals
Q17. What fraction is the same as 0.5?
Answer: 1/2. Why: Five tenths simplifies to one-half.
Q18. Which is larger: 3/4 or 1/2?
Answer: 3/4. Why: Three-quarters is 0.75, which is greater than 0.5.
Q19. What is one-half of 18?
Answer: 9. Why: 18 divided by 2 is 9.
Q20. What is 1/4 + 1/4?
Answer: 1/2. Why: Two quarters equal one-half.
Q21. What is 0.3 + 0.7?
Answer: 1.0. Why: Three tenths plus seven tenths equals ten tenths.
Q22. What is 25% of 20?
Answer: 5. Why: One quarter of 20 is 5.
Q23. Which fraction is larger: 2/3 or 1/3?
Answer: 2/3. Why: They have the same denominator, so two thirds is larger.
Q24. What is 1.5 + 2.5?
Answer: 4. Why: The decimal parts add to one whole, giving 4.
Shapes, Time & Measurement
Q25. How many sides does a hexagon have?
Answer: 6. Why: The prefix hexa- means six.
Q26. How many degrees are in a right angle?
Answer: 90 degrees. Why: A right angle measures exactly 90 degrees.
Q27. How many faces does a cube have?
Answer: 6. Why: A cube has six square faces.
Q28. What is the perimeter of a square with side length 5 cm?
Answer: 20 cm. Why: A square has four equal sides, so 4 × 5 = 20.
Q29. What is the area of a rectangle that is 6 cm by 4 cm?
Answer: 24 square centimeters. Why: Area equals length × width.
Q30. How many minutes are in 2 hours?
Answer: 120. Why: Each hour has 60 minutes.
Q31. How many centimeters are in 1 meter?
Answer: 100. Why: One meter equals 100 centimeters.
Q32. What is the name of an eight-sided polygon?
Answer: An octagon. Why: The prefix octa- means eight.
Math Challenge Round
Q33. What is the next number in the pattern 2, 4, 8, 16, …?
Answer: 32. Why: Each number is doubled.
Q34. What is the smallest prime number?
Answer: 2. Why: It is the only even prime number.
Q35. What is 7 squared?
Answer: 49. Why: 7 × 7 = 49.
Q36. What is the square root of 81?
Answer: 9. Why: 9 × 9 = 81.
Q37. If a dozen eggs is 12 eggs, how many eggs are in 3 dozen?
Answer: 36. Why: 3 × 12 = 36.
Q38. A fair coin is flipped once. What is the probability of heads?
Answer: 1/2. Why: There are two equally likely outcomes.
Q39. What is the average of 4, 6 and 8?
Answer: 6. Why: Their sum is 18, and 18 ÷ 3 = 6.
Q40. If two numbers add to 20 and one number is 8, what is the other number?
Answer: 12. Why: 20 – 8 = 12.
Reliable Math References
- National Council of Teachers of Mathematics — Principles and Standards
- Common Core State Standards — Mathematics
- NIST — SI Units
Math Trivia FAQ
What age is this math trivia for? Most questions are suitable for ages 6–12, with the last round giving older elementary learners a little more challenge.
Can teachers use these questions as a warm-up? Yes. A short 5–10 question round works well as a low-pressure review before a lesson or as a team activity.
