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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 67 · 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.If today is Wednesday, what day was it 8 days ago? (a) Wednesday (b) Monday (c) Tuesday (d) Friday
  2. 2.900 × 10 =
  3. 3.9 × 8 = ?2 — what is the missing digit?
  4. 4.I thought of a number, multiplied it by 4 and added 6. I got 58. What was my number?
  5. 5.37 × 24 =
  6. 6.9 × 6 = ?4 — what is the missing digit?
  7. 7.1 + 2 + 3 + … + 34 =
  8. 8.41 × 4 =
  9. 9.29?6 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  10. 10.Magic square (every row, column and diagonal has the same total): 9 7 17 | ? 11 3 | 5 15 13. What is the missing number?
  11. 11.Double 14 =
  12. 12.1 + 3 + 5 + … + 17 =
  13. 13.1 × 9 =
  14. 14.1 + 2 + 3 + … + 50 =
  15. 15.10 × 9 =
  16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
  17. 17.123 × 8 + 3 =
  18. 18.Magic square (every row, column and diagonal has the same total): 10 3 8 | ? 7 9 | 6 11 4. What is the missing number?
  19. 19.9 × 3 = 2? — what is the missing digit?
  20. 20.Half of 82 =
  21. 21.874 × 10 =
  22. 22.46 × 4 =
  23. 23.11 × 11 =
  24. 24.Double 95 =
  25. 25.39 × ? = 39000
  26. 26.A girl is 6 years old and her brother is 4 years older. How old will her brother be in 2 years?
  27. 27.7 × 9 =
  28. 28.Magic trick! Think of 8. Double it, add 10, halve it, then take away 8. What number do you get?
  29. 29.11 × 4 =
  30. 30.52 × 100 =
  31. 31.What comes next? 12, 15, 18, 21, ? (a) 25 (b) 24 (c) 21 (d) 27
  32. 32.9 × 2 = ?8 — what is the missing digit?
  33. 33.540 × ? = 5400
  34. 34.If today is Saturday, what day was it 49 days ago? (a) Saturday (b) Tuesday (c) Sunday (d) Friday
  35. 35.If today is Wednesday, what day will it be after 80 days? (a) Sunday (b) Tuesday (c) Saturday (d) Friday
  36. 36.26?9 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  37. 37.9 × 10 = 9? — what is the missing digit?
  38. 38.1 + 2 + 3 + … + 66 =
  39. 39.14 × 4 =
  40. 40.What comes next? 1, 2, 4, 8, ? (a) 17 (b) 16 (c) 14 (d) 12

Answer key

  1. Tuesday
  2. 9000
  3. 7
  4. 13
  5. 888
  6. 5
  7. 595
  8. 164
  9. 1
  10. 19
  11. 28
  12. 81
  13. 9
  14. 1275
  15. 90
  16. 693
  17. 987
  18. 5
  19. 7
  20. 41
  21. 8740
  22. 184
  23. 121
  24. 190
  25. 1000
  26. 12
  27. 63
  28. 5
  29. 44
  30. 5200
  31. 24
  32. 1
  33. 10
  34. Saturday
  35. Saturday
  36. 1
  37. 0
  38. 2211
  39. 56
  40. 16

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