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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 305 · 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? 4, 8, 16, 32, ? (a) 65 (b) 48 (c) 64 (d) 56
  2. 2.Magic square (every row, column and diagonal has the same total): 8 22 ? | 18 14 10 | 16 6 20. What is the missing number?
  3. 3.573 × ? = 5730
  4. 4.693 + 396 =
  5. 5.123456 × 9 + 7 =
  6. 6.Odd one out: which number is NOT in the 7 times table? (a) 56 (b) 42 (c) 62 (d) 21
  7. 7.Magic square (every row, column and diagonal has the same total): 11 4 9 | ? 8 10 | 7 12 5. What is the missing number?
  8. 8.84 × 100 =
  9. 9.12345679 × 9 =
  10. 10.9 × 8 = ?2 — what is the missing digit?
  11. 11.Take 29 and take away the sum of its digits. What do you get?
  12. 12.If today is Saturday, what day will it be after 52 days? (a) Friday (b) Tuesday (c) Wednesday (d) Monday
  13. 13.1 + 2 + 3 + … + 35 =
  14. 14.43 × 1000 =
  15. 15.49 × 4 =
  16. 16.48 × 1000 =
  17. 17.Double 89 =
  18. 18.2 × ? = 200
  19. 19.28 × 4 =
  20. 20.1 + 2 + 3 + … + 85 =
  21. 21.I thought of a number, added 9 and then doubled it. I got 56. What was my number?
  22. 22.Take 48 and take away the sum of its digits. What do you get?
  23. 23.9 × 6 = ?4 — what is the missing digit?
  24. 24.Take 725. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  25. 25.290 × 10 =
  26. 26.3 × 9 =
  27. 27.Think of 14. Multiply it by 5, then add 5. What number do you end with?
  28. 28.Take 246. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  29. 29.Magic square (every row, column and diagonal has the same total): 18 33 12 | 15 21 27 | ? 9 24. What is the missing number?
  30. 30.1 × 9 =
  31. 31.What comes next? 7, 15, 23, 31, ? (a) 47 (b) 39 (c) 40 (d) 31
  32. 32.Half of 142 =
  33. 33.You have 12 coins. Each coin is ₹1 or ₹2, and together they make ₹22. How many ₹2 coins do you have?
  34. 34.What comes next? 5, 10, 20, 40, ? (a) 70 (b) 81 (c) 60 (d) 80
  35. 35.Half of 72 =
  36. 36.1 + 2 + 3 + … + 39 =
  37. 37.9 × 2 = ?8 — what is the missing digit?
  38. 38.What comes next? 7, 9, 11, 13, ? (a) 16 (b) 15 (c) 13 (d) 17
  39. 39.What comes next? 4, 9, 16, 25, ? (a) 34 (b) 36 (c) 38 (d) 37
  40. 40.What comes next? 25, 36, 49, 64, ? (a) 79 (b) 82 (c) 81 (d) 83

Answer key

  1. 64
  2. 12
  3. 10
  4. 1089
  5. 1111111
  6. 62
  7. 6
  8. 8400
  9. 111111111
  10. 7
  11. 18
  12. Tuesday
  13. 630
  14. 43000
  15. 196
  16. 48000
  17. 178
  18. 100
  19. 112
  20. 3655
  21. 19
  22. 36
  23. 5
  24. 198
  25. 2900
  26. 27
  27. 75
  28. 396
  29. 30
  30. 9
  31. 39
  32. 71
  33. 10
  34. 80
  35. 36
  36. 780
  37. 1
  38. 15
  39. 36
  40. 81

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