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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 558 · 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.Magic square (every row, column and diagonal has the same total): 24 3 18 | 9 15 21 | 12 ? 6. What is the missing number?
  2. 2.63 × 100 =
  3. 3.9 × 8 = ?2 — what is the missing digit?
  4. 4.7?60 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  5. 5.37 × 9 =
  6. 6.Magic square (every row, column and diagonal has the same total): 4 9 ? | 3 5 7 | 8 1 6. What is the missing number?
  7. 7.9 × 2 = 1? — what is the missing digit?
  8. 8.25 × 4 =
  9. 9.Half of 194 =
  10. 10.1 × 9 =
  11. 11.4?10 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  12. 12.The 6th of a month is a Thursday. What day is the 22nd of the same month? (a) Sunday (b) Friday (c) Saturday (d) Tuesday
  13. 13.A father is 38 years old and his son is 9. How old was the father when the son was born?
  14. 14.1 + 3 + 5 + … + 39 =
  15. 15.8 × 9 =
  16. 16.1 + 2 + 3 + … + 14 =
  17. 17.Odd one out: which number is NOT in the 4 times table? (a) 8 (b) 20 (c) 16 (d) 14
  18. 18.58 × 100 =
  19. 19.What comes next? 5, 10, 15, 20, ? (a) 30 (b) 25 (c) 26 (d) 20
  20. 20.Do the 1089 trick with 648: reverse and subtract, then reverse that answer and add. What do you get?
  21. 21.2?02 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  22. 22.Do the 1089 trick with 673: reverse and subtract, then reverse that answer and add. What do you get?
  23. 23.Magic square (every row, column and diagonal has the same total): 13 11 ? | 23 15 7 | 9 19 17. What is the missing number?
  24. 24.21 × 100 =
  25. 25.1 + 3 + 5 + … + 35 =
  26. 26.The ages of two twins add up to 24. How old is each twin?
  27. 27.What comes next? 4, 8, 16, 32, ? (a) 56 (b) 65 (c) 64 (d) 48
  28. 28.12 × 1000 =
  29. 29.Take 41 and take away the sum of its digits. What do you get?
  30. 30.9 × 6 = ?4 — what is the missing digit?
  31. 31.Do the 1089 trick with 841: reverse and subtract, then reverse that answer and add. What do you get?
  32. 32.If today is Monday, what day will it be after 76 days? (a) Monday (b) Sunday (c) Wednesday (d) Saturday
  33. 33.Magic square (every row, column and diagonal has the same total): 7 12 5 | 6 8 10 | 11 4 ?. What is the missing number?
  34. 34.4 × 9 =
  35. 35.297 + 792 =
  36. 36.9 × 9 = ?1 — what is the missing digit?
  37. 37.9 × 3 =
  38. 38.12345 × 8 + 5 =
  39. 39.Odd one out: which number is NOT in the 9 times table? (a) 37 (b) 45 (c) 36 (d) 27
  40. 40.Double 79 =

Answer key

  1. 27
  2. 6300
  3. 7
  4. 5
  5. 333
  6. 2
  7. 8
  8. 100
  9. 97
  10. 9
  11. 4
  12. Saturday
  13. 29
  14. 400
  15. 72
  16. 105
  17. 14
  18. 5800
  19. 25
  20. 1089
  21. 5
  22. 1089
  23. 21
  24. 2100
  25. 324
  26. 12
  27. 64
  28. 12000
  29. 36
  30. 5
  31. 1089
  32. Sunday
  33. 9
  34. 36
  35. 1089
  36. 8
  37. 27
  38. 98765
  39. 37
  40. 158

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