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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 459 · 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. 1.55 × 100 =
  2. 2.9 × 3 = 2? — what is the missing digit?
  3. 3.Magic square (every row, column and diagonal has the same total): 16 31 10 | 13 19 25 | 28 ? 22. What is the missing number?
  4. 4.What comes next? 36, 49, 64, 81, ? (a) 102 (b) 101 (c) 100 (d) 98
  5. 5.Take 23 and take away the sum of its digits. What do you get?
  6. 6.9 × 1000 =
  7. 7.7 × 4 =
  8. 8.Half of 118 =
  9. 9.In 4 years a boy will be 13 years old. How old was he 6 years ago?
  10. 10.28 × 100 =
  11. 11.9 × 3 =
  12. 12.9 × 7 =
  13. 13.What comes next? 2, 9, 16, 23, ? (a) 37 (b) 30 (c) 31 (d) 23
  14. 14.Odd one out: which number is NOT in the 6 times table? (a) 24 (b) 42 (c) 14 (d) 30
  15. 15.8?83 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  16. 16.12345678 × 9 + 9 =
  17. 17.The 4th of a month is a Wednesday. What day is the 22nd of the same month? (a) Wednesday (b) Monday (c) Saturday (d) Sunday
  18. 18.Half of 98 =
  19. 19.1 + 3 + 5 + … + 49 =
  20. 20.Magic square (every row, column and diagonal has the same total): 25 11 21 | 15 19 23 | ? 27 13. What is the missing number?
  21. 21.9 × 3 = ?7 — what is the missing digit?
  22. 22.Double 67 =
  23. 23.Take 28 and take away the sum of its digits. What do you get?
  24. 24.You have 10 coins. Each coin is ₹1 or ₹2, and together they make ₹16. How many ₹2 coins do you have?
  25. 25.A father is 38 years old and his son is 10. How old was the father when the son was born?
  26. 26.11 × 11 =
  27. 27.The 4th of a month is a Thursday. What day is the 18th of the same month? (a) Thursday (b) Friday (c) Sunday (d) Wednesday
  28. 28.I thought of a number, multiplied it by 2 and added 4. I got 8. What was my number?
  29. 29.26 × 4 =
  30. 30.16 × 4 =
  31. 31.Do the 1089 trick with 583: reverse and subtract, then reverse that answer and add. What do you get?
  32. 32.Double 58 =
  33. 33.A father is 35 years old and his son is 8. How old was the father when the son was born?
  34. 34.Half of 106 =
  35. 35.Magic square (every row, column and diagonal has the same total): 17 ? 9 | 3 11 19 | 13 15 5. What is the missing number?
  36. 36.What comes next? 10, 17, 24, 31, ? (a) 39 (b) 31 (c) 38 (d) 45
  37. 37.51 × 4 =
  38. 38.What comes next? 9, 16, 25, 36, ? (a) 49 (b) 51 (c) 47 (d) 50
  39. 39.58 × 4 =
  40. 40.Half of 82 =

Answer key

  1. 5500
  2. 7
  3. 7
  4. 100
  5. 18
  6. 9000
  7. 28
  8. 59
  9. 3
  10. 2800
  11. 27
  12. 63
  13. 30
  14. 14
  15. 8
  16. 111111111
  17. Sunday
  18. 49
  19. 625
  20. 17
  21. 2
  22. 134
  23. 18
  24. 6
  25. 28
  26. 121
  27. Thursday
  28. 2
  29. 104
  30. 64
  31. 1089
  32. 116
  33. 27
  34. 53
  35. 7
  36. 38
  37. 204
  38. 49
  39. 232
  40. 41

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