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.
Kids who like shapes and symmetry can try these Rubik’s Cube patterns with moves.
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.
