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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 576 · 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. 1.58 × 100 =
  2. 2.2 × ? = 2000
  3. 3.1 × 9 =
  4. 4.15 × 4 =
  5. 5.Magic trick! Think of 2. Double it, add 18, halve it, then take away 2. What number do you get?
  6. 6.Take 347. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  7. 7.A father is 43 years old and his son is 7. How old was the father when the son was born?
  8. 8.1 + 3 + 5 + … + 39 =
  9. 9.Magic square (every row, column and diagonal has the same total): 7 14 9 | 12 10 ? | 11 6 13. What is the missing number?
  10. 10.1 + 2 + 3 + … + 72 =
  11. 11.12345679 × 81 =
  12. 12.If today is Saturday, what day was it 60 days ago? (a) Wednesday (b) Friday (c) Tuesday (d) Monday
  13. 13.1 + 2 + 3 + … + 10 =
  14. 14.1 + 3 + 5 + … + 35 =
  15. 15.Magic square (every row, column and diagonal has the same total): 12 ? 8 | 5 9 13 | 10 11 6. What is the missing number?
  16. 16.Magic square (every row, column and diagonal has the same total): 18 15 30 | 33 21 ? | 12 27 24. What is the missing number?
  17. 17.19 × 1000 =
  18. 18.Odd one out: which number is NOT in the 5 times table? (a) 40 (b) 25 (c) 18 (d) 20
  19. 19.1 + 2 + 3 + … + 28 =
  20. 20.9 × 9 = ?1 — what is the missing digit?
  21. 21.Double 61 =
  22. 22.14 × ? = 1400
  23. 23.43 × 4 =
  24. 24.What comes next? 20, 22, 24, 26, ? (a) 30 (b) 28 (c) 29 (d) 26
  25. 25.If today is Wednesday, what day will it be after 46 days? (a) Sunday (b) Monday (c) Saturday (d) Wednesday
  26. 26.9 × 7 = 6? — what is the missing digit?
  27. 27.Magic square (every row, column and diagonal has the same total): 11 10 15 | 16 12 ? | 9 14 13. What is the missing number?
  28. 28.?091 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  29. 29.Take 604. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  30. 30.Magic trick! Think of 20. Double it, add 4, halve it, then take away 20. What number do you get?
  31. 31.Half of 152 =
  32. 32.The 5th of a month is a Sunday. What day is the 19th of the same month? (a) Monday (b) Sunday (c) Wednesday (d) Saturday
  33. 33.49 × 4 =
  34. 34.A father is 44 years old and his son is 14. How old was the father when the son was born?
  35. 35.9 × 2 = ?8 — what is the missing digit?
  36. 36.14 × 1000 =
  37. 37.1 + 2 + 3 + … + 51 =
  38. 38.9 × 10 = 9? — what is the missing digit?
  39. 39.Magic square (every row, column and diagonal has the same total): 19 22 7 | 4 16 28 | 25 ? 13. What is the missing number?
  40. 40.Magic square (every row, column and diagonal has the same total): ? 15 8 | 9 11 13 | 14 7 12. What is the missing number?

Answer key

  1. 5800
  2. 1000
  3. 9
  4. 60
  5. 9
  6. 396
  7. 36
  8. 400
  9. 8
  10. 2628
  11. 999999999
  12. Tuesday
  13. 55
  14. 324
  15. 7
  16. 9
  17. 19000
  18. 18
  19. 406
  20. 8
  21. 122
  22. 100
  23. 172
  24. 28
  25. Sunday
  26. 3
  27. 8
  28. 8
  29. 198
  30. 2
  31. 76
  32. Sunday
  33. 196
  34. 30
  35. 1
  36. 14000
  37. 1326
  38. 0
  39. 10
  40. 10

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