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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 746 · 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.What comes next? 5, 12, 19, 26, ? (a) 34 (b) 33 (c) 26 (d) 40
  2. 2.1 + 2 + 3 + … + 52 =
  3. 3.9 × 10 = 9? — what is the missing digit?
  4. 4.I thought of a number, multiplied it by 3 and added 9. I got 30. What was my number?
  5. 5.If today is Friday, what day was it 8 days ago? (a) Wednesday (b) Sunday (c) Friday (d) Thursday
  6. 6.10 × 9 =
  7. 7.Magic square (every row, column and diagonal has the same total): 20 17 32 | 35 23 11 | 14 29 ?. What is the missing number?
  8. 8.If today is Sunday, what day was it 25 days ago? (a) Tuesday (b) Thursday (c) Wednesday (d) Saturday
  9. 9.A father is 33 years old and his son is 4. How old was the father when the son was born?
  10. 10.What comes next? 16, 25, 36, 49, ? (a) 62 (b) 66 (c) 64 (d) 65
  11. 11.In 3 years a boy will be 13 years old. How old was he 2 years ago?
  12. 12.Double 51 =
  13. 13.Take 62 and take away the sum of its digits. What do you get?
  14. 14.Double 61 =
  15. 15.9 × 6 = 5? — what is the missing digit?
  16. 16.What comes next? 19, 23, 27, 31, ? (a) 31 (b) 36 (c) 35 (d) 39
  17. 17.27 × 4 =
  18. 18.57 × 4 =
  19. 19.9 × 10 = ?0 — what is the missing digit?
  20. 20.What comes next? 3, 6, 12, 24, ? (a) 48 (b) 49 (c) 42 (d) 36
  21. 21.Take 16 and take away the sum of its digits. What do you get?
  22. 22.1 + 2 + 3 + … + 93 =
  23. 23.9 × 6 = ?4 — what is the missing digit?
  24. 24.20 × 100 =
  25. 25.9 × 5 = ?5 — what is the missing digit?
  26. 26.9 × 3 = 2? — what is the missing digit?
  27. 27.Take 85 and take away the sum of its digits. What do you get?
  28. 28.What comes next? 4, 9, 16, 25, ? (a) 37 (b) 38 (c) 36 (d) 34
  29. 29.Take 39 and take away the sum of its digits. What do you get?
  30. 30.If today is Tuesday, what day will it be after 31 days? (a) Thursday (b) Friday (c) Monday (d) Saturday
  31. 31.Magic square (every row, column and diagonal has the same total): 12 17 10 | 11 13 15 | ? 9 14. What is the missing number?
  32. 32.What comes next? 6, 12, 18, 24, ? (a) 30 (b) 36 (c) 24 (d) 31
  33. 33.A father is 38 years old and his son is 7. How old was the father when the son was born?
  34. 34.1 + 3 + 5 + … + 19 =
  35. 35.In 5 years a boy will be 17 years old. How old was he 2 years ago?
  36. 36.4 × 9 =
  37. 37.9 × 4 = 3? — what is the missing digit?
  38. 38.3 × 9 =
  39. 39.Magic square (every row, column and diagonal has the same total): 19 22 ? | 4 16 28 | 25 10 13. What is the missing number?
  40. 40.What comes next? 4, 8, 16, 32, ? (a) 56 (b) 64 (c) 48 (d) 65

Answer key

  1. 33
  2. 1378
  3. 0
  4. 7
  5. Thursday
  6. 90
  7. 26
  8. Wednesday
  9. 29
  10. 64
  11. 8
  12. 102
  13. 54
  14. 122
  15. 4
  16. 35
  17. 108
  18. 228
  19. 9
  20. 48
  21. 9
  22. 4371
  23. 5
  24. 2000
  25. 4
  26. 7
  27. 72
  28. 36
  29. 27
  30. Friday
  31. 16
  32. 30
  33. 31
  34. 100
  35. 10
  36. 36
  37. 6
  38. 27
  39. 7
  40. 64

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