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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 995 · 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. 1.5 × 9 =
  2. 2.1 + 2 + 3 + … + 17 =
  3. 3.If today is Tuesday, what day was it 40 days ago? (a) Thursday (b) Wednesday (c) Friday (d) Sunday
  4. 4.9 × 3 = ?7 — what is the missing digit?
  5. 5.6 × 9 =
  6. 6.2 × 9 =
  7. 7.I thought of a number, multiplied it by 2 and added 3. I got 13. What was my number?
  8. 8.7 × 9 =
  9. 9.Magic square (every row, column and diagonal has the same total): 12 22 ? | 10 14 18 | 20 6 16. What is the missing number?
  10. 10.9 × 10 =
  11. 11.8?0 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  12. 12.916 × 10 =
  13. 13.44 × 4 =
  14. 14.Magic square (every row, column and diagonal has the same total): 12 13 8 | 7 11 15 | 14 9 ?. What is the missing number?
  15. 15.9 × 9 = ?1 — what is the missing digit?
  16. 16.1 × 9 =
  17. 17.15 × ? = 1500
  18. 18.9 × 3 = 2? — what is the missing digit?
  19. 19.If today is Thursday, what day will it be after 50 days? (a) Monday (b) Saturday (c) Thursday (d) Friday
  20. 20.If today is Monday, what day was it 51 days ago? (a) Friday (b) Tuesday (c) Sunday (d) Saturday
  21. 21.9 × 8 =
  22. 22.Half of 158 =
  23. 23.What comes next? 5, 10, 20, 40, ? (a) 81 (b) 70 (c) 60 (d) 80
  24. 24.What comes next? 1, 4, 9, 16, ? (a) 23 (b) 25 (c) 27 (d) 26
  25. 25.If today is Monday, what day will it be after 87 days? (a) Wednesday (b) Friday (c) Thursday (d) Sunday
  26. 26.Double 51 =
  27. 27.693 + 396 =
  28. 28.In 5 years a boy will be 16 years old. How old was he 5 years ago?
  29. 29.In 4 years a boy will be 18 years old. How old was he 5 years ago?
  30. 30.1 + 3 + 5 + … + 33 =
  31. 31.Magic square (every row, column and diagonal has the same total): 5 ? 13 | 19 11 3 | 9 7 17. What is the missing number?
  32. 32.37 × 18 =
  33. 33.198 + 891 =
  34. 34.1 + 3 + 5 + … + 45 =
  35. 35.35 × 4 =
  36. 36.38 × 4 =
  37. 37.32 × ? = 3200
  38. 38.16 × 4 =
  39. 39.What comes next? 1, 2, 4, 8, ? (a) 12 (b) 17 (c) 16 (d) 14
  40. 40.Double 95 =

Answer key

  1. 45
  2. 153
  3. Thursday
  4. 2
  5. 54
  6. 18
  7. 5
  8. 63
  9. 8
  10. 90
  11. 1
  12. 9160
  13. 176
  14. 10
  15. 8
  16. 9
  17. 100
  18. 7
  19. Friday
  20. Saturday
  21. 72
  22. 79
  23. 80
  24. 25
  25. Thursday
  26. 102
  27. 1089
  28. 6
  29. 9
  30. 289
  31. 15
  32. 666
  33. 1089
  34. 529
  35. 140
  36. 152
  37. 100
  38. 64
  39. 16
  40. 190

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