← Mixed trick challenge lesson New set →

Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 538 · 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.Double 44 =
  2. 2.12345679 × 9 =
  3. 3.In 2 years a boy will be 14 years old. How old was he 7 years ago?
  4. 4.I thought of a number, added 1 and then doubled it. I got 10. What was my number?
  5. 5.15 × ? = 1500
  6. 6.21 × 4 =
  7. 7.Think of 15. Multiply it by 3, then add 9. What number do you end with?
  8. 8.Take 24 and take away the sum of its digits. What do you get?
  9. 9.What comes next? 9, 16, 25, 36, ? (a) 47 (b) 50 (c) 49 (d) 51
  10. 10.Magic square (every row, column and diagonal has the same total): 9 2 ? | 4 6 8 | 5 10 3. What is the missing number?
  11. 11.23 × 1000 =
  12. 12.9 × 9 =
  13. 13.What comes next? 36, 49, 64, 81, ? (a) 98 (b) 101 (c) 102 (d) 100
  14. 14.Magic trick! Think of 4. Double it, add 12, halve it, then take away 4. What number do you get?
  15. 15.What comes next? 18, 22, 26, 30, ? (a) 30 (b) 38 (c) 35 (d) 34
  16. 16.12345679 × 72 =
  17. 17.3 × 9 =
  18. 18.Double 36 =
  19. 19.9 × 3 = ?7 — what is the missing digit?
  20. 20.What comes next? 5, 10, 20, 40, ? (a) 81 (b) 70 (c) 80 (d) 60
  21. 21.15?0 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  22. 22.I thought of a number, multiplied it by 4 and added 4. I got 52. What was my number?
  23. 23.Half of 24 =
  24. 24.123 × 8 + 3 =
  25. 25.58 × 4 =
  26. 26.9 × 4 = 3? — what is the missing digit?
  27. 27.9 × 6 =
  28. 28.9 × 6 = 5? — what is the missing digit?
  29. 29.A girl is 7 years old and her brother is 3 years older. How old will her brother be in 3 years?
  30. 30.693 + 396 =
  31. 31.1 + 2 + 3 + … + 93 =
  32. 32.83 × ? = 8300
  33. 33.1234567 × 9 + 8 =
  34. 34.53 × 4 =
  35. 35.12345678 × 9 + 9 =
  36. 36.7 × 9 =
  37. 37.Take 457. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  38. 38.Do the 1089 trick with 114: reverse and subtract, then reverse that answer and add. What do you get?
  39. 39.8 × 4 =
  40. 40.A father is 44 years old and his son is 11. How old was the father when the son was born?

Answer key

  1. 88
  2. 111111111
  3. 5
  4. 4
  5. 100
  6. 84
  7. 54
  8. 18
  9. 49
  10. 7
  11. 23000
  12. 81
  13. 100
  14. 6
  15. 34
  16. 888888888
  17. 27
  18. 72
  19. 2
  20. 80
  21. 3
  22. 12
  23. 12
  24. 987
  25. 232
  26. 6
  27. 54
  28. 4
  29. 13
  30. 1089
  31. 4371
  32. 100
  33. 11111111
  34. 212
  35. 111111111
  36. 63
  37. 297
  38. 1089
  39. 32
  40. 33

Free maths tricks lessons, practice and worksheets at talentjr.in/maths-tricks