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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 431 · 40 questions
TalentJR

The trick (Choose a trick): × 9 → finger trick; × 4 → double double; × 10, 100, 1000 → slide and add zeros. 37, 12345679 or 111… → magic patterns; reverse and subtract → 1089. Puzzles: find the rule, the total or the leftover days, then check your answer.

NameDateTime takenScore ___ / 40
  1. 1.Odd one out: which number is NOT in the 3 times table? (a) 16 (b) 18 (c) 15 (d) 12
  2. 2.If today is Monday, what day was it 9 days ago? (a) Saturday (b) Sunday (c) Friday (d) Tuesday
  3. 3.A father is 39 years old and his son is 6. How old was the father when the son was born?
  4. 4.A father is 33 years old and his son is 5. How old was the father when the son was born?
  5. 5.Half of 108 =
  6. 6.If today is Saturday, what day was it 46 days ago? (a) Wednesday (b) Tuesday (c) Monday (d) Friday
  7. 7.A father is 41 years old and his son is 14. How old was the father when the son was born?
  8. 8.Double 75 =
  9. 9.43 × 1000 =
  10. 10.Take 94 and take away the sum of its digits. What do you get?
  11. 11.Odd one out: which number is NOT in the 4 times table? (a) 20 (b) 8 (c) 12 (d) 31
  12. 12.1 + 3 + 5 + … + 21 =
  13. 13.1 + 2 + 3 + … + 42 =
  14. 14.117 × 10 =
  15. 15.Magic square (every row, column and diagonal has the same total): 13 18 11 | ? 14 16 | 17 10 15. What is the missing number?
  16. 16.I thought of a number, multiplied it by 3 and added 7. I got 49. What was my number?
  17. 17.123456 × 9 + 7 =
  18. 18.4 × 9 =
  19. 19.9 × 2 = ?8 — what is the missing digit?
  20. 20.Double 73 =
  21. 21.Magic trick! Think of 3. Double it, add 8, halve it, then take away 3. What number do you get?
  22. 22.52 × 4 =
  23. 23.What comes next? 25, 36, 49, 64, ? (a) 82 (b) 81 (c) 83 (d) 79
  24. 24.9 × 4 =
  25. 25.What comes next? 6, 9, 12, 15, ? (a) 15 (b) 19 (c) 21 (d) 18
  26. 26.Magic square (every row, column and diagonal has the same total): 27 6 21 | 12 ? 24 | 15 30 9. What is the missing number?
  27. 27.A girl is 8 years old and her brother is 6 years older. How old will her brother be in 3 years?
  28. 28.9 × 3 = 2? — what is the missing digit?
  29. 29.What comes next? 1, 2, 4, 8, ? (a) 17 (b) 16 (c) 12 (d) 14
  30. 30.In 2 years a boy will be 12 years old. How old was he 2 years ago?
  31. 31.You have 7 coins. Each coin is ₹1 or ₹2, and together they make ₹8. How many ₹2 coins do you have?
  32. 32.1234567 × 9 + 8 =
  33. 33.What comes next? 3, 6, 12, 24, ? (a) 36 (b) 48 (c) 42 (d) 49
  34. 34.The ages of two twins add up to 30. How old is each twin?
  35. 35.I thought of a number, added 3 and then doubled it. I got 28. What was my number?
  36. 36.What comes next? 1, 4, 9, 16, ? (a) 27 (b) 23 (c) 25 (d) 26
  37. 37.6 × 4 =
  38. 38.Magic square (every row, column and diagonal has the same total): 24 3 18 | 9 15 ? | 12 27 6. What is the missing number?
  39. 39.18 × ? = 18000
  40. 40.Magic trick! Think of 13. Double it, add 6, halve it, then take away 13. What number do you get?

Answer key

  1. 16
  2. Saturday
  3. 33
  4. 28
  5. 54
  6. Tuesday
  7. 27
  8. 150
  9. 43000
  10. 81
  11. 31
  12. 121
  13. 903
  14. 1170
  15. 12
  16. 14
  17. 1111111
  18. 36
  19. 1
  20. 146
  21. 4
  22. 208
  23. 81
  24. 36
  25. 18
  26. 18
  27. 17
  28. 7
  29. 16
  30. 8
  31. 1
  32. 11111111
  33. 48
  34. 15
  35. 11
  36. 25
  37. 24
  38. 21
  39. 1000
  40. 3

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