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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 984 · 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. 1.9 × 6 = 5? — what is the missing digit?
  2. 2.Think of 6. Multiply it by 5, then add 5. What number do you end with?
  3. 3.What comes next? 9, 16, 25, 36, ? (a) 50 (b) 49 (c) 51 (d) 47
  4. 4.What comes next? 3, 6, 12, 24, ? (a) 49 (b) 42 (c) 36 (d) 48
  5. 5.37 × 4 =
  6. 6.9 × 10 =
  7. 7.1 + 3 + 5 + … + 27 =
  8. 8.9 × 3 = ?7 — what is the missing digit?
  9. 9.297 + 792 =
  10. 10.?362 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  11. 11.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  12. 12.8?53 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  13. 13.Do the 1089 trick with 186: reverse and subtract, then reverse that answer and add. What do you get?
  14. 14.39 × 4 =
  15. 15.320 × 10 =
  16. 16.6 × 9 =
  17. 17.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
  18. 18.1 + 2 + 3 + … + 14 =
  19. 19.Think of 8. Multiply it by 5, then add 8. What number do you end with?
  20. 20.The 6th of a month is a Sunday. What day is the 22nd of the same month? (a) Friday (b) Wednesday (c) Tuesday (d) Monday
  21. 21.9 × 5 = 4? — what is the missing digit?
  22. 22.If today is Wednesday, what day will it be after 37 days? (a) Monday (b) Friday (c) Saturday (d) Thursday
  23. 23.?370 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  24. 24.8 × 9 =
  25. 25.49 × 4 =
  26. 26.9 × 2 = 1? — what is the missing digit?
  27. 27.1 + 2 + 3 + … + 78 =
  28. 28.19 × ? = 19000
  29. 29.11 × 1000 =
  30. 30.1 + 2 + 3 + … + 15 =
  31. 31.What comes next? 14, 17, 20, 23, ? (a) 23 (b) 26 (c) 27 (d) 29
  32. 32.23 × 1000 =
  33. 33.Magic square (every row, column and diagonal has the same total): ? 9 10 | 7 11 15 | 12 13 8. What is the missing number?
  34. 34.84 × 100 =
  35. 35.The 2nd of a month is a Wednesday. What day is the 25th of the same month? (a) Friday (b) Monday (c) Saturday (d) Thursday
  36. 36.Double 53 =
  37. 37.1 + 3 + 5 + … + 49 =
  38. 38.What comes next? 1, 4, 9, 16, ? (a) 26 (b) 25 (c) 23 (d) 27
  39. 39.Do the 1089 trick with 582: reverse and subtract, then reverse that answer and add. What do you get?
  40. 40.Magic square (every row, column and diagonal has the same total): 10 15 14 | ? 13 9 | 12 11 16. What is the missing number?

Answer key

  1. 4
  2. 35
  3. 49
  4. 48
  5. 148
  6. 90
  7. 196
  8. 2
  9. 1089
  10. 7
  11. 792
  12. 2
  13. 1089
  14. 156
  15. 3200
  16. 54
  17. 1089
  18. 105
  19. 48
  20. Tuesday
  21. 5
  22. Friday
  23. 8
  24. 72
  25. 196
  26. 8
  27. 3081
  28. 1000
  29. 11000
  30. 120
  31. 26
  32. 23000
  33. 14
  34. 8400
  35. Friday
  36. 106
  37. 625
  38. 25
  39. 1089
  40. 17

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