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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 258 · 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. 1.12 × 9 + 3 =
  2. 2.37 × 10 =
  3. 3.A father is 43 years old and his son is 5. How old was the father when the son was born?
  4. 4.Half of 34 =
  5. 5.A girl is 9 years old and her brother is 2 years older. How old will her brother be in 3 years?
  6. 6.444 × 10 =
  7. 7.Magic square (every row, column and diagonal has the same total): 23 26 11 | ? 20 32 | 29 14 17. What is the missing number?
  8. 8.1 + 3 + 5 + … + 35 =
  9. 9.Magic square (every row, column and diagonal has the same total): 3 8 7 | 10 6 ? | 5 4 9. What is the missing number?
  10. 10.Magic square (every row, column and diagonal has the same total): 23 13 15 | 9 17 25 | 19 21 ?. What is the missing number?
  11. 11.A girl is 11 years old and her brother is 5 years older. How old will her brother be in 7 years?
  12. 12.1 + 2 + 3 + … + 81 =
  13. 13.12 × 8 + 2 =
  14. 14.Magic square (every row, column and diagonal has the same total): 11 25 15 | 21 ? 13 | 19 9 23. What is the missing number?
  15. 15.If today is Tuesday, what day will it be after 31 days? (a) Saturday (b) Thursday (c) Friday (d) Monday
  16. 16.7 × ? = 7000
  17. 17.9 × 6 = 5? — what is the missing digit?
  18. 18.79 × 10 =
  19. 19.Odd one out: which number is NOT in the 6 times table? (a) 30 (b) 42 (c) 34 (d) 24
  20. 20.18 × 4 =
  21. 21.495 + 594 =
  22. 22.What comes next? 9, 16, 25, 36, ? (a) 51 (b) 50 (c) 49 (d) 47
  23. 23.891 + 198 =
  24. 24.9 × 8 =
  25. 25.803? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  26. 26.Magic square (every row, column and diagonal has the same total): 10 ? 18 | 20 12 4 | 6 16 14. What is the missing number?
  27. 27.11 × 11 =
  28. 28.44 × 4 =
  29. 29.26 × 1000 =
  30. 30.Take 96 and take away the sum of its digits. What do you get?
  31. 31.9 × 4 =
  32. 32.Double 69 =
  33. 33.What comes next? 16, 20, 24, 28, ? (a) 36 (b) 28 (c) 33 (d) 32
  34. 34.17 × 4 =
  35. 35.If today is Wednesday, what day will it be after 94 days? (a) Sunday (b) Friday (c) Saturday (d) Tuesday
  36. 36.What comes next? 15, 24, 33, 42, ? (a) 51 (b) 42 (c) 60 (d) 52
  37. 37.The 6th of a month is a Thursday. What day is the 28th of the same month? (a) Monday (b) Saturday (c) Friday (d) Thursday
  38. 38.1 + 2 + 3 + … + 24 =
  39. 39.344? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  40. 40.9 × 9 =

Answer key

  1. 111
  2. 370
  3. 38
  4. 17
  5. 14
  6. 4440
  7. 8
  8. 324
  9. 2
  10. 11
  11. 23
  12. 3321
  13. 98
  14. 17
  15. Friday
  16. 1000
  17. 4
  18. 790
  19. 34
  20. 72
  21. 1089
  22. 49
  23. 1089
  24. 72
  25. 7
  26. 8
  27. 121
  28. 176
  29. 26000
  30. 81
  31. 36
  32. 138
  33. 32
  34. 68
  35. Saturday
  36. 51
  37. Friday
  38. 300
  39. 7
  40. 81

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