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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 277 · 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.Take 85 and take away the sum of its digits. What do you get?
  2. 2.50 × ? = 5000
  3. 3.Take 88 and take away the sum of its digits. What do you get?
  4. 4.Do the 1089 trick with 326: reverse and subtract, then reverse that answer and add. What do you get?
  5. 5.What comes next? 4, 8, 16, 32, ? (a) 65 (b) 64 (c) 56 (d) 48
  6. 6.What comes next? 4, 9, 16, 25, ? (a) 38 (b) 37 (c) 34 (d) 36
  7. 7.594 + 495 =
  8. 8.9 × 7 = 6? — what is the missing digit?
  9. 9.12 × 8 + 2 =
  10. 10.7 × 4 =
  11. 11.9 × 1 =
  12. 12.The ages of two twins add up to 12. How old is each twin?
  13. 13.I thought of a number, multiplied it by 3 and added 8. I got 53. What was my number?
  14. 14.9 × 3 =
  15. 15.What comes next? 16, 25, 36, 49, ? (a) 62 (b) 66 (c) 64 (d) 65
  16. 16.What comes next? 4, 10, 16, 22, ? (a) 22 (b) 29 (c) 28 (d) 34
  17. 17.45 × 4 =
  18. 18.306 × 10 =
  19. 19.Think of 11. Multiply it by 3, then add 4. What number do you end with?
  20. 20.?292 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  21. 21.Take 89 and take away the sum of its digits. What do you get?
  22. 22.What comes next? 2, 4, 8, 16, ? (a) 33 (b) 28 (c) 24 (d) 32
  23. 23.A piggy bank has 8 coins of ₹5 and 5 coins of ₹2. How many rupees are in it?
  24. 24.A girl is 9 years old and her brother is 5 years older. How old will her brother be in 9 years?
  25. 25.9 × 9 = 8? — what is the missing digit?
  26. 26.Magic square (every row, column and diagonal has the same total): ? 32 17 | 26 20 14 | 23 8 29. What is the missing number?
  27. 27.What comes next? 9, 16, 25, 36, ? (a) 50 (b) 47 (c) 49 (d) 51
  28. 28.9 × 7 =
  29. 29.1 + 3 + 5 + … + 37 =
  30. 30.1 + 3 + 5 + … + 17 =
  31. 31.1 + 3 + 5 + … + 27 =
  32. 32.Take 57 and take away the sum of its digits. What do you get?
  33. 33.I thought of a number, added 3 and then doubled it. I got 40. What was my number?
  34. 34.9 × 5 = 4? — what is the missing digit?
  35. 35.67 × 10 =
  36. 36.What comes next? 14, 19, 24, 29, ? (a) 34 (b) 39 (c) 29 (d) 35
  37. 37.A girl is 10 years old and her brother is 6 years older. How old will her brother be in 5 years?
  38. 38.A girl is 6 years old and her brother is 4 years older. How old will her brother be in 6 years?
  39. 39.Magic square (every row, column and diagonal has the same total): 20 23 ? | 5 17 29 | 26 11 14. What is the missing number?
  40. 40.14 × 1000 =

Answer key

  1. 72
  2. 100
  3. 72
  4. 1089
  5. 64
  6. 36
  7. 1089
  8. 3
  9. 98
  10. 28
  11. 9
  12. 6
  13. 15
  14. 27
  15. 64
  16. 28
  17. 180
  18. 3060
  19. 37
  20. 5
  21. 72
  22. 32
  23. 50
  24. 23
  25. 1
  26. 11
  27. 49
  28. 63
  29. 361
  30. 81
  31. 196
  32. 45
  33. 17
  34. 5
  35. 670
  36. 34
  37. 21
  38. 16
  39. 8
  40. 14000

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