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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 606 · 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. 1.123 × 9 + 4 =
  2. 2.Half of 54 =
  3. 3.Odd one out: which number is NOT in the 6 times table? (a) 19 (b) 18 (c) 42 (d) 36
  4. 4.111 × 111 =
  5. 5.Magic square (every row, column and diagonal has the same total): 10 31 ? | 25 19 13 | 22 7 28. What is the missing number?
  6. 6.1 + 2 + 3 + … + 43 =
  7. 7.Odd one out: which number is NOT in the 8 times table? (a) 16 (b) 42 (c) 56 (d) 32
  8. 8.14 × 100 =
  9. 9.1 + 2 + 3 + … + 20 =
  10. 10.What comes next? 16, 25, 36, 49, ? (a) 64 (b) 62 (c) 66 (d) 65
  11. 11.What comes next? 4, 8, 16, 32, ? (a) 64 (b) 56 (c) 48 (d) 65
  12. 12.The 3rd of a month is a Sunday. What day is the 25th of the same month? (a) Thursday (b) Monday (c) Tuesday (d) Sunday
  13. 13.What comes next? 1, 4, 9, 16, ? (a) 23 (b) 27 (c) 26 (d) 25
  14. 14.31 × 1000 =
  15. 15.37 × 18 =
  16. 16.Half of 146 =
  17. 17.What comes next? 11, 19, 27, 35, ? (a) 44 (b) 51 (c) 43 (d) 35
  18. 18.What comes next? 17, 20, 23, 26, ? (a) 30 (b) 26 (c) 32 (d) 29
  19. 19.The ages of two twins add up to 18. How old is each twin?
  20. 20.693 + 396 =
  21. 21.9 × 9 =
  22. 22.625? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  23. 23.Think of 13. Multiply it by 3, then add 9. What number do you end with?
  24. 24.2 × 9 =
  25. 25.Half of 194 =
  26. 26.5 × 9 =
  27. 27.46 × 1000 =
  28. 28.9 × 2 = 1? — what is the missing digit?
  29. 29.Magic trick! Think of 5. Double it, add 16, halve it, then take away 5. What number do you get?
  30. 30.11111 × 11111 =
  31. 31.42 × ? = 4200
  32. 32.I thought of a number, multiplied it by 5 and added 6. I got 56. What was my number?
  33. 33.1 + 2 + 3 + … + 14 =
  34. 34.What comes next? 1, 2, 4, 8, ? (a) 16 (b) 12 (c) 14 (d) 17
  35. 35.6 × 9 =
  36. 36.9 × 6 = 5? — what is the missing digit?
  37. 37.Magic square (every row, column and diagonal has the same total): 15 36 21 | 30 ? 18 | 27 12 33. What is the missing number?
  38. 38.9 × 7 =
  39. 39.Magic square (every row, column and diagonal has the same total): 23 26 11 | 8 20 32 | 29 14 ?. What is the missing number?
  40. 40.263? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?

Answer key

  1. 1111
  2. 27
  3. 19
  4. 12321
  5. 16
  6. 946
  7. 42
  8. 1400
  9. 210
  10. 64
  11. 64
  12. Monday
  13. 25
  14. 31000
  15. 666
  16. 73
  17. 43
  18. 29
  19. 9
  20. 1089
  21. 81
  22. 5
  23. 48
  24. 18
  25. 97
  26. 45
  27. 46000
  28. 8
  29. 8
  30. 123454321
  31. 100
  32. 10
  33. 105
  34. 16
  35. 54
  36. 4
  37. 24
  38. 63
  39. 17
  40. 7

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