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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 602 · 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. 1.1 + 2 + 3 + … + 85 =
  2. 2.Magic square (every row, column and diagonal has the same total): 12 7 14 | 13 11 9 | ? 15 10. What is the missing number?
  3. 3.Double 61 =
  4. 4.1 + 2 + 3 + … + 74 =
  5. 5.Magic trick! Think of 14. Double it, add 18, halve it, then take away 14. What number do you get?
  6. 6.297 + 792 =
  7. 7.The 6th of a month is a Tuesday. What day is the 27th of the same month? (a) Friday (b) Wednesday (c) Monday (d) Tuesday
  8. 8.What comes next? 8, 14, 20, 26, ? (a) 38 (b) 33 (c) 32 (d) 26
  9. 9.In 2 years a boy will be 16 years old. How old was he 6 years ago?
  10. 10.Think of 10. Multiply it by 5, then add 4. What number do you end with?
  11. 11.13 × 4 =
  12. 12.9 × 1 =
  13. 13.Do the 1089 trick with 890: reverse and subtract, then reverse that answer and add. What do you get?
  14. 14.28 × 4 =
  15. 15.1 + 2 + 3 + … + 40 =
  16. 16.If today is Saturday, what day was it 14 days ago? (a) Tuesday (b) Friday (c) Saturday (d) Sunday
  17. 17.A father is 34 years old and his son is 11. How old was the father when the son was born?
  18. 18.9 × 2 = ?8 — what is the missing digit?
  19. 19.9 × 4 = 3? — what is the missing digit?
  20. 20.22 × 1000 =
  21. 21.A piggy bank has 9 coins of ₹5 and 10 coins of ₹2. How many rupees are in it?
  22. 22.86 × ? = 8600
  23. 23.If today is Thursday, what day will it be after 46 days? (a) Sunday (b) Thursday (c) Tuesday (d) Monday
  24. 24.9 × 7 = ?3 — what is the missing digit?
  25. 25.What comes next? 9, 16, 25, 36, ? (a) 50 (b) 47 (c) 49 (d) 51
  26. 26.1 + 3 + 5 + … + 21 =
  27. 27.1 + 2 + 3 + … + 53 =
  28. 28.The 5th of a month is a Thursday. What day is the 18th of the same month? (a) Saturday (b) Tuesday (c) Wednesday (d) Thursday
  29. 29.7 × 4 =
  30. 30.9 × 2 =
  31. 31.If today is Saturday, what day was it 22 days ago? (a) Saturday (b) Friday (c) Thursday (d) Monday
  32. 32.Odd one out: which number is NOT in the 9 times table? (a) 54 (b) 27 (c) 36 (d) 38
  33. 33.1 × 9 =
  34. 34.24 × 1000 =
  35. 35.Magic square (every row, column and diagonal has the same total): 8 22 ? | 18 14 10 | 16 6 20. What is the missing number?
  36. 36.If today is Friday, what day will it be after 91 days? (a) Saturday (b) Monday (c) Thursday (d) Friday
  37. 37.Half of 102 =
  38. 38.29 × 4 =
  39. 39.11 × 4 =
  40. 40.5 × 9 =

Answer key

  1. 3655
  2. 8
  3. 122
  4. 2775
  5. 9
  6. 1089
  7. Tuesday
  8. 32
  9. 8
  10. 54
  11. 52
  12. 9
  13. 1089
  14. 112
  15. 820
  16. Saturday
  17. 23
  18. 1
  19. 6
  20. 22000
  21. 65
  22. 100
  23. Monday
  24. 6
  25. 49
  26. 121
  27. 1431
  28. Wednesday
  29. 28
  30. 18
  31. Friday
  32. 38
  33. 9
  34. 24000
  35. 12
  36. Friday
  37. 51
  38. 116
  39. 44
  40. 45

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