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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 226 · 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.Magic square (every row, column and diagonal has the same total): 15 8 13 | 10 ? 14 | 11 16 9. What is the missing number?
  2. 2.Odd one out: which number is NOT in the 7 times table? (a) 20 (b) 56 (c) 49 (d) 28
  3. 3.What comes next? 19, 24, 29, 34, ? (a) 44 (b) 40 (c) 34 (d) 39
  4. 4.11111 × 11111 =
  5. 5.9 × 8 =
  6. 6.Double 73 =
  7. 7.Magic square (every row, column and diagonal has the same total): 19 5 15 | 9 13 17 | 11 ? 7. What is the missing number?
  8. 8.9 × 4 = 3? — what is the missing digit?
  9. 9.What comes next? 8, 13, 18, 23, ? (a) 33 (b) 23 (c) 29 (d) 28
  10. 10.Magic square (every row, column and diagonal has the same total): 10 9 14 | 15 11 7 | 8 ? 12. What is the missing number?
  11. 11.Magic square (every row, column and diagonal has the same total): 21 23 13 | 11 19 27 | 25 ? 17. What is the missing number?
  12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
  13. 13.Magic square (every row, column and diagonal has the same total): 20 23 ? | 5 17 29 | 26 11 14. What is the missing number?
  14. 14.Double 58 =
  15. 15.9 × 9 =
  16. 16.The ages of two twins add up to 24. How old is each twin?
  17. 17.9 × 8 = ?2 — what is the missing digit?
  18. 18.2 × 9 =
  19. 19.21 × 4 =
  20. 20.9 × 8 = 7? — what is the missing digit?
  21. 21.Magic square (every row, column and diagonal has the same total): 2 7 6 | 9 ? 1 | 4 3 8. What is the missing number?
  22. 22.22 × 1000 =
  23. 23.Double 42 =
  24. 24.9 × 4 = ?6 — what is the missing digit?
  25. 25.A girl is 5 years old and her brother is 3 years older. How old will her brother be in 7 years?
  26. 26.12345679 × 9 =
  27. 27.70 × 10 =
  28. 28.1 + 2 + 3 + … + 82 =
  29. 29.11 × 11 =
  30. 30.What comes next? 1, 8, 15, 22, ? (a) 36 (b) 22 (c) 30 (d) 29
  31. 31.49 × 4 =
  32. 32.12345679 × 72 =
  33. 33.29 × 4 =
  34. 34.Magic square (every row, column and diagonal has the same total): 8 6 16 | 18 ? 2 | 4 14 12. What is the missing number?
  35. 35.What comes next? 6, 12, 18, 24, ? (a) 30 (b) 36 (c) 31 (d) 24
  36. 36.Double 18 =
  37. 37.1 + 3 + 5 + … + 23 =
  38. 38.Double 68 =
  39. 39.Magic square (every row, column and diagonal has the same total): 26 29 14 | ? 23 35 | 32 17 20. What is the missing number?
  40. 40.The ages of two twins add up to 26. How old is each twin?

Answer key

  1. 12
  2. 20
  3. 39
  4. 123454321
  5. 72
  6. 146
  7. 21
  8. 6
  9. 28
  10. 13
  11. 15
  12. 891
  13. 8
  14. 116
  15. 81
  16. 12
  17. 7
  18. 18
  19. 84
  20. 2
  21. 5
  22. 22000
  23. 84
  24. 3
  25. 15
  26. 111111111
  27. 700
  28. 3403
  29. 121
  30. 29
  31. 196
  32. 888888888
  33. 116
  34. 10
  35. 30
  36. 36
  37. 144
  38. 136
  39. 11
  40. 13

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