← Mixed trick challenge lesson New set →

Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 767 · 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. 1.1 + 2 + 3 + … + 69 =
  2. 2.1 + 2 + 3 + … + 42 =
  3. 3.1 + 2 + 3 + … + 45 =
  4. 4.29 × 4 =
  5. 5.9 × 9 = ?1 — what is the missing digit?
  6. 6.I thought of a number, added 5 and then doubled it. I got 42. What was my number?
  7. 7.A father is 44 years old and his son is 12. How old was the father when the son was born?
  8. 8.Magic square (every row, column and diagonal has the same total): 4 9 8 | 11 ? 3 | 6 5 10. What is the missing number?
  9. 9.59 × 4 =
  10. 10.The 3rd of a month is a Wednesday. What day is the 23rd of the same month? (a) Tuesday (b) Friday (c) Monday (d) Wednesday
  11. 11.Do the 1089 trick with 325: reverse and subtract, then reverse that answer and add. What do you get?
  12. 12.Do the 1089 trick with 800: reverse and subtract, then reverse that answer and add. What do you get?
  13. 13.1 + 2 + 3 + … + 36 =
  14. 14.Take 90 and take away the sum of its digits. What do you get?
  15. 15.10 × 9 =
  16. 16.I thought of a number, multiplied it by 3 and added 7. I got 31. What was my number?
  17. 17.Magic square (every row, column and diagonal has the same total): 18 33 12 | 15 ? 27 | 30 9 24. What is the missing number?
  18. 18.Take 15 and take away the sum of its digits. What do you get?
  19. 19.31 × 1000 =
  20. 20.Double 86 =
  21. 21.I thought of a number, multiplied it by 5 and added 1. I got 11. What was my number?
  22. 22.1 + 3 + 5 + … + 41 =
  23. 23.14 × 1000 =
  24. 24.Half of 84 =
  25. 25.What comes next? 36, 49, 64, 81, ? (a) 101 (b) 100 (c) 102 (d) 98
  26. 26.Odd one out: which number is NOT in the 5 times table? (a) 25 (b) 47 (c) 20 (d) 15
  27. 27.Do the 1089 trick with 668: reverse and subtract, then reverse that answer and add. What do you get?
  28. 28.9 × 6 =
  29. 29.18 × 1000 =
  30. 30.9 × 8 =
  31. 31.Take 82 and take away the sum of its digits. What do you get?
  32. 32.If today is Friday, what day was it 29 days ago? (a) Sunday (b) Wednesday (c) Thursday (d) Friday
  33. 33.Magic square (every row, column and diagonal has the same total): 11 16 9 | 10 12 14 | 15 8 ?. What is the missing number?
  34. 34.9 × 4 =
  35. 35.If today is Sunday, what day was it 19 days ago? (a) Monday (b) Friday (c) Wednesday (d) Tuesday
  36. 36.9 × 3 = 2? — what is the missing digit?
  37. 37.?310 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, 22, 27, 32, ? (a) 37 (b) 42 (c) 32 (d) 38
  39. 39.126? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  40. 40.?048 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?

Answer key

  1. 2415
  2. 903
  3. 1035
  4. 116
  5. 8
  6. 16
  7. 32
  8. 7
  9. 236
  10. Tuesday
  11. 1089
  12. 1089
  13. 666
  14. 81
  15. 90
  16. 8
  17. 21
  18. 9
  19. 31000
  20. 172
  21. 2
  22. 441
  23. 14000
  24. 42
  25. 100
  26. 47
  27. 1089
  28. 54
  29. 18000
  30. 72
  31. 72
  32. Thursday
  33. 13
  34. 36
  35. Tuesday
  36. 7
  37. 5
  38. 37
  39. 9
  40. 6

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