← Mixed trick challenge lesson New set →

Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 441 · 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 940: reverse and subtract, then reverse that answer and add. 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. 3.1 + 3 + 5 + … + 9 =
  4. 4.A girl is 10 years old and her brother is 3 years older. How old will her brother be in 4 years?
  5. 5.77?6 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  6. 6.I thought of a number, multiplied it by 2 and added 2. I got 24. What was my number?
  7. 7.Half of 12 =
  8. 8.9 × 6 = ?4 — what is the missing digit?
  9. 9.15 × 100 =
  10. 10.9 × 2 = ?8 — what is the missing digit?
  11. 11.12345679 × 81 =
  12. 12.I thought of a number, multiplied it by 2 and added 5. I got 13. What was my number?
  13. 13.20 × 100 =
  14. 14.If today is Saturday, what day was it 25 days ago? (a) Monday (b) Wednesday (c) Tuesday (d) Friday
  15. 15.1 + 2 + 3 + … + 70 =
  16. 16.1 + 3 + 5 + … + 43 =
  17. 17.12345679 × 36 =
  18. 18.What comes next? 8, 13, 18, 23, ? (a) 23 (b) 29 (c) 33 (d) 28
  19. 19.12345679 × 9 =
  20. 20.9 × 9 =
  21. 21.Double 41 =
  22. 22.3?2 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  23. 23.9 × 5 = ?5 — what is the missing digit?
  24. 24.35 × ? = 35000
  25. 25.Take 89 and take away the sum of its digits. What do you get?
  26. 26.A girl is 7 years old and her brother is 5 years older. How old will her brother be in 7 years?
  27. 27.Magic trick! Think of 11. Double it, add 18, halve it, then take away 11. What number do you get?
  28. 28.Odd one out: which number is NOT in the 3 times table? (a) 6 (b) 14 (c) 12 (d) 9
  29. 29.Magic square (every row, column and diagonal has the same total): 8 15 10 | 13 ? 9 | 12 7 14. What is the missing number?
  30. 30.In 3 years a boy will be 14 years old. How old was he 5 years ago?
  31. 31.What comes next? 4, 8, 16, 32, ? (a) 64 (b) 56 (c) 65 (d) 48
  32. 32.123 × 9 + 4 =
  33. 33.9 × 7 =
  34. 34.If today is Wednesday, what day was it 36 days ago? (a) Wednesday (b) Monday (c) Tuesday (d) Friday
  35. 35.If today is Wednesday, what day was it 50 days ago? (a) Friday (b) Monday (c) Tuesday (d) Wednesday
  36. 36.?087 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  37. 37.37 × 27 =
  38. 38.3 × 9 =
  39. 39.What comes next? 2, 7, 12, 17, ? (a) 27 (b) 17 (c) 23 (d) 22
  40. 40.1 + 2 + 3 + … + 40 =

Answer key

  1. 1089
  2. 297
  3. 25
  4. 17
  5. 7
  6. 11
  7. 6
  8. 5
  9. 1500
  10. 1
  11. 999999999
  12. 4
  13. 2000
  14. Tuesday
  15. 2485
  16. 484
  17. 444444444
  18. 28
  19. 111111111
  20. 81
  21. 82
  22. 4
  23. 4
  24. 1000
  25. 72
  26. 19
  27. 9
  28. 14
  29. 11
  30. 6
  31. 64
  32. 1111
  33. 63
  34. Tuesday
  35. Tuesday
  36. 3
  37. 999
  38. 27
  39. 22
  40. 820

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