← Mixed trick challenge lesson New set →

Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 115 · 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 119. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  2. 2.12345679 × 27 =
  3. 3.9 × 10 =
  4. 4.Half of 14 =
  5. 5.10 × 9 =
  6. 6.18 × 4 =
  7. 7.What comes next? 4, 8, 16, 32, ? (a) 65 (b) 64 (c) 48 (d) 56
  8. 8.The 1st of a month is a Sunday. What day is the 11th of the same month? (a) Tuesday (b) Thursday (c) Wednesday (d) Saturday
  9. 9.9 × 4 = ?6 — what is the missing digit?
  10. 10.47 × 4 =
  11. 11.1 + 2 + 3 + … + 13 =
  12. 12.A father is 32 years old and his son is 7. How old was the father when the son was born?
  13. 13.What comes next? 3, 6, 12, 24, ? (a) 49 (b) 42 (c) 36 (d) 48
  14. 14.335 × 10 =
  15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
  16. 16.49 × 1000 =
  17. 17.9 × 3 =
  18. 18.129 × 10 =
  19. 19.123456 × 8 + 6 =
  20. 20.46 × 1000 =
  21. 21.A father is 31 years old and his son is 5. How old was the father when the son was born?
  22. 22.Magic square (every row, column and diagonal has the same total): 10 3 ? | 5 7 9 | 6 11 4. What is the missing number?
  23. 23.26 × 4 =
  24. 24.9 × 7 = ?3 — what is the missing digit?
  25. 25.?29 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  26. 26.1234567 × 8 + 7 =
  27. 27.1 + 3 + 5 + … + 17 =
  28. 28.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
  29. 29.10 × 4 =
  30. 30.9 × 8 =
  31. 31.The 3rd of a month is a Thursday. What day is the 11th of the same month? (a) Thursday (b) Monday (c) Saturday (d) Friday
  32. 32.42 × ? = 4200
  33. 33.What comes next? 4, 9, 16, 25, ? (a) 38 (b) 34 (c) 36 (d) 37
  34. 34.Half of 22 =
  35. 35.Magic square (every row, column and diagonal has the same total): 14 ? 26 | 35 23 11 | 20 17 32. What is the missing number?
  36. 36.Magic square (every row, column and diagonal has the same total): 18 3 24 | ? 15 9 | 6 27 12. What is the missing number?
  37. 37.1 + 2 + 3 + … + 11 =
  38. 38.1?44 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  39. 39.9 × 7 =
  40. 40.38 × 100 =

Answer key

  1. 792
  2. 333333333
  3. 90
  4. 7
  5. 90
  6. 72
  7. 64
  8. Wednesday
  9. 3
  10. 188
  11. 91
  12. 25
  13. 48
  14. 3350
  15. 495
  16. 49000
  17. 27
  18. 1290
  19. 987654
  20. 46000
  21. 26
  22. 8
  23. 104
  24. 6
  25. 7
  26. 9876543
  27. 81
  28. 792
  29. 40
  30. 72
  31. Friday
  32. 100
  33. 36
  34. 11
  35. 29
  36. 21
  37. 66
  38. 9
  39. 63
  40. 3800

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