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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 197 · 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. 1.63 × 100 =
  2. 2.Magic square (every row, column and diagonal has the same total): 8 13 6 | 7 9 11 | ? 5 10. What is the missing number?
  3. 3.43 × 4 =
  4. 4.11 × 11 =
  5. 5.Half of 12 =
  6. 6.Take 48 and take away the sum of its digits. What do you get?
  7. 7.Half of 158 =
  8. 8.1234567 × 9 + 8 =
  9. 9.594 + 495 =
  10. 10.9 × 4 = ?6 — what is the missing digit?
  11. 11.1 + 3 + 5 + … + 45 =
  12. 12.1 + 2 + 3 + … + 42 =
  13. 13.9 × 3 = ?7 — what is the missing digit?
  14. 14.Magic square (every row, column and diagonal has the same total): 9 19 ? | 7 11 15 | 17 3 13. What is the missing number?
  15. 15.The 9th of a month is a Sunday. What day is the 19th of the same month? (a) Thursday (b) Wednesday (c) Tuesday (d) Saturday
  16. 16.Magic trick! Think of 2. Double it, add 10, halve it, then take away 2. What number do you get?
  17. 17.19?8 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  18. 18.9 × 7 = ?3 — what is the missing digit?
  19. 19.You have 12 coins. Each coin is ₹1 or ₹2, and together they make ₹22. How many ₹2 coins do you have?
  20. 20.1 + 2 + 3 + … + 41 =
  21. 21.Half of 48 =
  22. 22.52 × 4 =
  23. 23.36 × ? = 3600
  24. 24.72 × 100 =
  25. 25.65? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  26. 26.37 × 27 =
  27. 27.1 + 2 + 3 + … + 80 =
  28. 28.12345679 × 27 =
  29. 29.Take 37 and take away the sum of its digits. What do you get?
  30. 30.Magic square (every row, column and diagonal has the same total): ? 30 15 | 24 18 12 | 21 6 27. What is the missing number?
  31. 31.If today is Monday, what day was it 20 days ago? (a) Wednesday (b) Friday (c) Monday (d) Tuesday
  32. 32.47 × 4 =
  33. 33.6 × 9 =
  34. 34.37 × 18 =
  35. 35.50 × 4 =
  36. 36.Magic square (every row, column and diagonal has the same total): 8 23 20 | 29 ? 5 | 14 11 26. What is the missing number?
  37. 37.Odd one out: which number is NOT in the 3 times table? (a) 15 (b) 16 (c) 6 (d) 9
  38. 38.2 × 9 =
  39. 39.If today is Monday, what day will it be after 11 days? (a) Thursday (b) Friday (c) Monday (d) Saturday
  40. 40.9 × 8 = ?2 — what is the missing digit?

Answer key

  1. 6300
  2. 12
  3. 172
  4. 121
  5. 6
  6. 36
  7. 79
  8. 11111111
  9. 1089
  10. 3
  11. 529
  12. 903
  13. 2
  14. 5
  15. Wednesday
  16. 5
  17. 9
  18. 6
  19. 10
  20. 861
  21. 24
  22. 208
  23. 100
  24. 7200
  25. 7
  26. 999
  27. 3240
  28. 333333333
  29. 27
  30. 9
  31. Tuesday
  32. 188
  33. 54
  34. 666
  35. 200
  36. 17
  37. 16
  38. 18
  39. Friday
  40. 7

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