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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 604 · 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 + … + 17 =
  2. 2.Magic square (every row, column and diagonal has the same total): 28 7 22 | 13 19 25 | 16 ? 10. What is the missing number?
  3. 3.37 × 24 =
  4. 4.Double 41 =
  5. 5.37 × 3 =
  6. 6.The 4th of a month is a Tuesday. What day is the 23rd of the same month? (a) Wednesday (b) Saturday (c) Sunday (d) Monday
  7. 7.9 × 6 =
  8. 8.1 + 3 + 5 + … + 37 =
  9. 9.A father is 34 years old and his son is 11. How old was the father when the son was born?
  10. 10.58 × 4 =
  11. 11.13 × 4 =
  12. 12.11111 × 11111 =
  13. 13.What comes next? 20, 29, 38, 47, ? (a) 47 (b) 65 (c) 56 (d) 57
  14. 14.I thought of a number, added 1 and then doubled it. I got 34. What was my number?
  15. 15.If today is Saturday, what day will it be after 92 days? (a) Sunday (b) Saturday (c) Wednesday (d) Monday
  16. 16.2 × 9 =
  17. 17.Magic trick! Think of 13. Double it, add 16, halve it, then take away 13. What number do you get?
  18. 18.30 × 1000 =
  19. 19.Half of 192 =
  20. 20.12345679 × 54 =
  21. 21.59 × 4 =
  22. 22.Double 38 =
  23. 23.976 × ? = 9760
  24. 24.1 + 3 + 5 + … + 9 =
  25. 25.37 × 9 =
  26. 26.If today is Friday, what day will it be after 60 days? (a) Friday (b) Monday (c) Tuesday (d) Wednesday
  27. 27.1 + 3 + 5 + … + 49 =
  28. 28.9 × 9 = ?1 — what is the missing digit?
  29. 29.A piggy bank has 8 coins of ₹5 and 15 coins of ₹2. How many rupees are in it?
  30. 30.I thought of a number, multiplied it by 3 and added 5. I got 50. What was my number?
  31. 31.Half of 122 =
  32. 32.Think of 4. Multiply it by 2, then add 3. What number do you end with?
  33. 33.The ages of two twins add up to 14. How old is each twin?
  34. 34.What comes next? 1, 2, 4, 8, ? (a) 14 (b) 17 (c) 12 (d) 16
  35. 35.Magic square (every row, column and diagonal has the same total): 10 3 8 | ? 7 9 | 6 11 4. What is the missing number?
  36. 36.297 + 792 =
  37. 37.Take 32 and take away the sum of its digits. What do you get?
  38. 38.44 × 1000 =
  39. 39.If today is Friday, what day will it be after 17 days? (a) Sunday (b) Monday (c) Tuesday (d) Thursday
  40. 40.What comes next? 6, 13, 20, 27, ? (a) 35 (b) 27 (c) 41 (d) 34

Answer key

  1. 153
  2. 31
  3. 888
  4. 82
  5. 111
  6. Sunday
  7. 54
  8. 361
  9. 23
  10. 232
  11. 52
  12. 123454321
  13. 56
  14. 16
  15. Sunday
  16. 18
  17. 8
  18. 30000
  19. 96
  20. 666666666
  21. 236
  22. 76
  23. 10
  24. 25
  25. 333
  26. Tuesday
  27. 625
  28. 8
  29. 70
  30. 15
  31. 61
  32. 11
  33. 7
  34. 16
  35. 5
  36. 1089
  37. 27
  38. 44000
  39. Monday
  40. 34

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