← Mixed trick challenge lesson New set →

Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 315 · 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 84 and take away the sum of its digits. What do you get?
  2. 2.If today is Wednesday, what day was it 57 days ago? (a) Friday (b) Wednesday (c) Monday (d) Tuesday
  3. 3.3 × 9 =
  4. 4.1 + 3 + 5 + … + 9 =
  5. 5.9 × 2 = 1? — what is the missing digit?
  6. 6.12 × 8 + 2 =
  7. 7.10 × 4 =
  8. 8.12345679 × 27 =
  9. 9.Magic trick! Think of 16. Double it, add 6, halve it, then take away 16. What number do you get?
  10. 10.1 + 3 + 5 + … + 27 =
  11. 11.Double 25 =
  12. 12.24 × ? = 24000
  13. 13.9 × 2 = ?8 — what is the missing digit?
  14. 14.594 + 495 =
  15. 15.I thought of a number, added 1 and then doubled it. I got 36. What was my number?
  16. 16.9 × 10 = ?0 — what is the missing digit?
  17. 17.9 × 10 = 9? — what is the missing digit?
  18. 18.68 × ? = 6800
  19. 19.What comes next? 15, 21, 27, 33, ? (a) 33 (b) 40 (c) 45 (d) 39
  20. 20.Take 32 and take away the sum of its digits. What do you get?
  21. 21.Think of 8. Multiply it by 2, then add 8. What number do you end with?
  22. 22.What comes next? 3, 6, 12, 24, ? (a) 36 (b) 49 (c) 42 (d) 48
  23. 23.What comes next? 4, 8, 16, 32, ? (a) 48 (b) 56 (c) 65 (d) 64
  24. 24.Half of 62 =
  25. 25.9 × 5 = 4? — what is the missing digit?
  26. 26.?509 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  27. 27.12 × 4 =
  28. 28.18 × 4 =
  29. 29.Double 81 =
  30. 30.A girl is 8 years old and her brother is 4 years older. How old will her brother be in 5 years?
  31. 31.I thought of a number, multiplied it by 3 and added 5. I got 11. What was my number?
  32. 32.Think of 13. Multiply it by 3, then add 3. What number do you end with?
  33. 33.9 × 3 = ?7 — what is the missing digit?
  34. 34.31 × 4 =
  35. 35.12345679 × 18 =
  36. 36.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
  37. 37.What comes next? 3, 8, 13, 18, ? (a) 28 (b) 24 (c) 18 (d) 23
  38. 38.52 × 4 =
  39. 39.9 × 3 =
  40. 40.If today is Sunday, what day will it be after 69 days? (a) Saturday (b) Friday (c) Tuesday (d) Sunday

Answer key

  1. 72
  2. Tuesday
  3. 27
  4. 25
  5. 8
  6. 98
  7. 40
  8. 333333333
  9. 3
  10. 196
  11. 50
  12. 1000
  13. 1
  14. 1089
  15. 17
  16. 9
  17. 0
  18. 100
  19. 39
  20. 27
  21. 24
  22. 48
  23. 64
  24. 31
  25. 5
  26. 4
  27. 48
  28. 72
  29. 162
  30. 17
  31. 2
  32. 42
  33. 2
  34. 124
  35. 222222222
  36. 198
  37. 23
  38. 208
  39. 27
  40. Saturday

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