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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 111 · 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.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
  2. 2.8 × 9 =
  3. 3.Odd one out: which number is NOT in the 3 times table? (a) 12 (b) 24 (c) 15 (d) 11
  4. 4.1 + 3 + 5 + … + 21 =
  5. 5.What comes next? 4, 9, 16, 25, ? (a) 38 (b) 34 (c) 36 (d) 37
  6. 6.What comes next? 12, 15, 18, 21, ? (a) 25 (b) 21 (c) 24 (d) 27
  7. 7.9 × 9 = ?1 — what is the missing digit?
  8. 8.What comes next? 11, 19, 27, 35, ? (a) 51 (b) 44 (c) 43 (d) 35
  9. 9.2?0 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  10. 10.11 × 11 =
  11. 11.The 8th of a month is a Sunday. What day is the 26th of the same month? (a) Sunday (b) Thursday (c) Friday (d) Wednesday
  12. 12.1 + 2 + 3 + … + 17 =
  13. 13.What comes next? 2, 6, 10, 14, ? (a) 19 (b) 14 (c) 18 (d) 22
  14. 14.37 × 6 =
  15. 15.Think of 9. Multiply it by 4, then add 2. What number do you end with?
  16. 16.If today is Sunday, what day will it be after 93 days? (a) Friday (b) Wednesday (c) Tuesday (d) Monday
  17. 17.The 8th of a month is a Monday. What day is the 18th of the same month? (a) Wednesday (b) Friday (c) Thursday (d) Sunday
  18. 18.Think of 14. Multiply it by 4, then add 6. What number do you end with?
  19. 19.Magic trick! Think of 5. Double it, add 4, halve it, then take away 5. What number do you get?
  20. 20.Half of 122 =
  21. 21.27 × 4 =
  22. 22.63?5 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  23. 23.Half of 16 =
  24. 24.What comes next? 1, 2, 4, 8, ? (a) 17 (b) 16 (c) 12 (d) 14
  25. 25.68?5 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
  27. 27.Take 953. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  28. 28.69 × 100 =
  29. 29.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
  30. 30.Odd one out: which number is NOT in the 4 times table? (a) 16 (b) 17 (c) 24 (d) 20
  31. 31.396 + 693 =
  32. 32.Odd one out: which number is NOT in the 6 times table? (a) 18 (b) 12 (c) 35 (d) 30
  33. 33.1 + 2 + 3 + … + 64 =
  34. 34.If today is Saturday, what day will it be after 75 days? (a) Friday (b) Thursday (c) Wednesday (d) Sunday
  35. 35.9 × 7 = ?3 — what is the missing digit?
  36. 36.67?2 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  37. 37.Odd one out: which number is NOT in the 4 times table? (a) 20 (b) 32 (c) 8 (d) 37
  38. 38.9 × 5 =
  39. 39.56 × 4 =
  40. 40.Half of 18 =

Answer key

  1. 1089
  2. 72
  3. 11
  4. 121
  5. 36
  6. 24
  7. 8
  8. 43
  9. 7
  10. 121
  11. Thursday
  12. 153
  13. 18
  14. 222
  15. 38
  16. Tuesday
  17. Thursday
  18. 62
  19. 2
  20. 61
  21. 108
  22. 4
  23. 8
  24. 16
  25. 8
  26. 297
  27. 594
  28. 6900
  29. 1089
  30. 17
  31. 1089
  32. 35
  33. 2080
  34. Thursday
  35. 6
  36. 3
  37. 37
  38. 45
  39. 224
  40. 9

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