← Mixed trick challenge lesson New set →

Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 356 · 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. 1.432 × ? = 4320
  2. 2.37 × 21 =
  3. 3.I thought of a number, added 1 and then doubled it. I got 14. What was my number?
  4. 4.Half of 124 =
  5. 5.9 × 7 = 6? — what is the missing digit?
  6. 6.Do the 1089 trick with 299: reverse and subtract, then reverse that answer and add. What do you get?
  7. 7.Magic square (every row, column and diagonal has the same total): 16 26 12 | ? 18 22 | 24 10 20. What is the missing number?
  8. 8.31 × 4 =
  9. 9.A girl is 5 years old and her brother is 3 years older. How old will her brother be in 4 years?
  10. 10.Half of 92 =
  11. 11.9 × 6 = ?4 — what is the missing digit?
  12. 12.9 × 4 = ?6 — what is the missing digit?
  13. 13.47 × 4 =
  14. 14.9 × 9 =
  15. 15.12345679 × 27 =
  16. 16.1 + 2 + 3 + … + 80 =
  17. 17.Magic square (every row, column and diagonal has the same total): 13 15 5 | 3 11 19 | 17 7 ?. What is the missing number?
  18. 18.468 × 10 =
  19. 19.Take 65 and take away the sum of its digits. What do you get?
  20. 20.8?31 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  21. 21.37 × 9 =
  22. 22.Take 88 and take away the sum of its digits. What do you get?
  23. 23.9 × 3 = ?7 — what is the missing digit?
  24. 24.1 + 3 + 5 + … + 21 =
  25. 25.1 + 3 + 5 + … + 9 =
  26. 26.Half of 18 =
  27. 27.9 × 4 = 3? — what is the missing digit?
  28. 28.12345679 × 9 =
  29. 29.20 × 4 =
  30. 30.Take 64 and take away the sum of its digits. What do you get?
  31. 31.12345678 × 9 + 9 =
  32. 32.48 × 4 =
  33. 33.A girl is 7 years old and her brother is 4 years older. How old will her brother be in 6 years?
  34. 34.9 × 6 = 5? — what is the missing digit?
  35. 35.9 × 2 = 1? — what is the missing digit?
  36. 36.I thought of a number, added 8 and then doubled it. I got 36. What was my number?
  37. 37.6 × 9 =
  38. 38.49 × 4 =
  39. 39.Take 96 and take away the sum of its digits. What do you get?
  40. 40.29 × 4 =

Answer key

  1. 10
  2. 777
  3. 6
  4. 62
  5. 3
  6. 1089
  7. 14
  8. 124
  9. 12
  10. 46
  11. 5
  12. 3
  13. 188
  14. 81
  15. 333333333
  16. 3240
  17. 9
  18. 4680
  19. 54
  20. 6
  21. 333
  22. 72
  23. 2
  24. 121
  25. 25
  26. 9
  27. 6
  28. 111111111
  29. 80
  30. 54
  31. 111111111
  32. 192
  33. 17
  34. 4
  35. 8
  36. 10
  37. 54
  38. 196
  39. 81
  40. 116

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