← Mixed trick challenge lesson New set →

Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 140 · 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.Take 29 and take away the sum of its digits. What do you get?
  2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
  3. 3.9 × 8 = ?2 — what is the missing digit?
  4. 4.37 × 3 =
  5. 5.33 × 4 =
  6. 6.1 + 2 + 3 + … + 13 =
  7. 7.12 × 9 + 3 =
  8. 8.9 × 6 = 5? — what is the missing digit?
  9. 9.37 × 24 =
  10. 10.9 × 10 =
  11. 11.Take 15 and take away the sum of its digits. What do you get?
  12. 12.Take 113. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  13. 13.28 × ? = 2800
  14. 14.37 × 15 =
  15. 15.28 × 1000 =
  16. 16.Half of 32 =
  17. 17.What comes next? 15, 19, 23, 27, ? (a) 31 (b) 35 (c) 27 (d) 32
  18. 18.48 × 4 =
  19. 19.24 × 4 =
  20. 20.What comes next? 2, 4, 8, 16, ? (a) 28 (b) 24 (c) 33 (d) 32
  21. 21.8 × 9 =
  22. 22.9 × 4 =
  23. 23.What comes next? 4, 9, 16, 25, ? (a) 38 (b) 34 (c) 37 (d) 36
  24. 24.9 × 3 =
  25. 25.Take 163. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  26. 26.37 × 6 =
  27. 27.34 × ? = 34000
  28. 28.Magic trick! Think of 10. Double it, add 12, halve it, then take away 10. What number do you get?
  29. 29.Magic square (every row, column and diagonal has the same total): 24 27 12 | 9 21 33 | 30 ? 18. What is the missing number?
  30. 30.11 × 11 =
  31. 31.Magic square (every row, column and diagonal has the same total): 13 6 11 | 8 10 12 | 9 14 ?. What is the missing number?
  32. 32.13 × 4 =
  33. 33.22 × 4 =
  34. 34.1 + 3 + 5 + … + 19 =
  35. 35.Think of 5. Multiply it by 2, then add 9. What number do you end with?
  36. 36.Magic square (every row, column and diagonal has the same total): 11 18 13 | 16 ? 12 | 15 10 17. What is the missing number?
  37. 37.7?92 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  38. 38.What comes next? 17, 20, 23, 26, ? (a) 30 (b) 26 (c) 29 (d) 32
  39. 39.123 × 8 + 3 =
  40. 40.Do the 1089 trick with 763: reverse and subtract, then reverse that answer and add. What do you get?

Answer key

  1. 18
  2. 297
  3. 7
  4. 111
  5. 132
  6. 91
  7. 111
  8. 4
  9. 888
  10. 90
  11. 9
  12. 198
  13. 100
  14. 555
  15. 28000
  16. 16
  17. 31
  18. 192
  19. 96
  20. 32
  21. 72
  22. 36
  23. 36
  24. 27
  25. 198
  26. 222
  27. 1000
  28. 6
  29. 15
  30. 121
  31. 7
  32. 52
  33. 88
  34. 100
  35. 19
  36. 14
  37. 9
  38. 29
  39. 987
  40. 1089

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