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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 114 · 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 482: reverse and subtract, then reverse that answer and add. What do you get?
  2. 2.30 × 4 =
  3. 3.47?0 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  4. 4.25 × 4 =
  5. 5.A girl is 12 years old and her brother is 2 years older. How old will her brother be in 2 years?
  6. 6.9 × 8 =
  7. 7.16 × ? = 16000
  8. 8.Magic square (every row, column and diagonal has the same total): 4 18 8 | 14 10 6 | ? 2 16. What is the missing number?
  9. 9.What comes next? 1, 4, 9, 16, ? (a) 23 (b) 26 (c) 25 (d) 27
  10. 10.The 3rd of a month is a Wednesday. What day is the 25th of the same month? (a) Wednesday (b) Thursday (c) Friday (d) Sunday
  11. 11.Take 994. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  12. 12.693 × ? = 6930
  13. 13.Half of 96 =
  14. 14.190 × ? = 1900
  15. 15.9 × 10 = 9? — what is the missing digit?
  16. 16.46?2 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  17. 17.354 × 10 =
  18. 18.What comes next? 19, 22, 25, 28, ? (a) 28 (b) 32 (c) 31 (d) 34
  19. 19.66?5 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  20. 20.12345679 × 72 =
  21. 21.49 × 4 =
  22. 22.Think of 5. Multiply it by 5, then add 7. What number do you end with?
  23. 23.953 × 10 =
  24. 24.30 × 100 =
  25. 25.The 3rd of a month is a Monday. What day is the 14th of the same month? (a) Thursday (b) Friday (c) Saturday (d) Monday
  26. 26.What comes next? 4, 9, 16, 25, ? (a) 36 (b) 38 (c) 37 (d) 34
  27. 27.965 × 10 =
  28. 28.9 × 9 = ?1 — what is the missing digit?
  29. 29.9 × 3 =
  30. 30.Magic square (every row, column and diagonal has the same total): 9 ? 13 | 14 10 6 | 7 12 11. What is the missing number?
  31. 31.9 × 2 = ?8 — what is the missing digit?
  32. 32.17 × 4 =
  33. 33.You have 8 coins. Each coin is ₹1 or ₹2, and together they make ₹14. How many ₹2 coins do you have?
  34. 34.9 × 2 =
  35. 35.What comes next? 3, 6, 12, 24, ? (a) 49 (b) 48 (c) 36 (d) 42
  36. 36.9 × 6 = 5? — what is the missing digit?
  37. 37.4 × ? = 400
  38. 38.Magic square (every row, column and diagonal has the same total): 13 14 9 | 8 12 16 | ? 10 11. What is the missing number?
  39. 39.11111 × 11111 =
  40. 40.What comes next? 1, 2, 4, 8, ? (a) 12 (b) 16 (c) 17 (d) 14

Answer key

  1. 1089
  2. 120
  3. 7
  4. 100
  5. 16
  6. 72
  7. 1000
  8. 12
  9. 25
  10. Thursday
  11. 495
  12. 10
  13. 48
  14. 10
  15. 0
  16. 6
  17. 3540
  18. 31
  19. 1
  20. 888888888
  21. 196
  22. 32
  23. 9530
  24. 3000
  25. Friday
  26. 36
  27. 9650
  28. 8
  29. 27
  30. 8
  31. 1
  32. 68
  33. 6
  34. 18
  35. 48
  36. 4
  37. 100
  38. 15
  39. 123454321
  40. 16

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