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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 373 · 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. 1.38 × 4 =
  2. 2.Half of 186 =
  3. 3.Take 76 and take away the sum of its digits. What do you get?
  4. 4.A piggy bank has 3 coins of ₹5 and 11 coins of ₹2. How many rupees are in it?
  5. 5.I thought of a number, multiplied it by 2 and added 6. I got 12. What was my number?
  6. 6.1 + 3 + 5 + … + 13 =
  7. 7.Half of 132 =
  8. 8.13 × 4 =
  9. 9.1111 × 1111 =
  10. 10.1 + 3 + 5 + … + 11 =
  11. 11.1 + 2 + 3 + … + 23 =
  12. 12.450 × ? = 4500
  13. 13.Magic square (every row, column and diagonal has the same total): 5 12 7 | ? 8 6 | 9 4 11. What is the missing number?
  14. 14.Odd one out: which number is NOT in the 7 times table? (a) 28 (b) 14 (c) 35 (d) 53
  15. 15.1 × 9 =
  16. 16.9 × 4 = ?6 — what is the missing digit?
  17. 17.Half of 34 =
  18. 18.Magic square (every row, column and diagonal has the same total): 7 28 13 | 22 ? 10 | 19 4 25. What is the missing number?
  19. 19.438 × ? = 4380
  20. 20.Half of 168 =
  21. 21.495 + 594 =
  22. 22.What comes next? 4, 8, 16, 32, ? (a) 65 (b) 56 (c) 64 (d) 48
  23. 23.Think of 3. Multiply it by 3, then add 9. What number do you end with?
  24. 24.I thought of a number, added 7 and then doubled it. I got 24. What was my number?
  25. 25.12345678 × 8 + 8 =
  26. 26.Magic trick! Think of 20. Double it, add 6, halve it, then take away 20. What number do you get?
  27. 27.4 × 1000 =
  28. 28.The ages of two twins add up to 24. How old is each twin?
  29. 29.Half of 24 =
  30. 30.7 × 100 =
  31. 31.What comes next? 20, 29, 38, 47, ? (a) 56 (b) 65 (c) 57 (d) 47
  32. 32.A girl is 10 years old and her brother is 2 years older. How old will her brother be in 7 years?
  33. 33.Magic square (every row, column and diagonal has the same total): 7 17 15 | 21 13 5 | 11 ? 19. What is the missing number?
  34. 34.Take 30 and take away the sum of its digits. What do you get?
  35. 35.Magic trick! Think of 15. Double it, add 18, halve it, then take away 15. What number do you get?
  36. 36.Odd one out: which number is NOT in the 8 times table? (a) 40 (b) 16 (c) 28 (d) 56
  37. 37.A piggy bank has 10 coins of ₹5 and 2 coins of ₹2. How many rupees are in it?
  38. 38.The 5th of a month is a Tuesday. What day is the 19th of the same month? (a) Wednesday (b) Tuesday (c) Friday (d) Monday
  39. 39.9 × 9 = 8? — what is the missing digit?
  40. 40.9 × 6 =

Answer key

  1. 152
  2. 93
  3. 63
  4. 37
  5. 3
  6. 49
  7. 66
  8. 52
  9. 1234321
  10. 36
  11. 276
  12. 10
  13. 10
  14. 53
  15. 9
  16. 3
  17. 17
  18. 16
  19. 10
  20. 84
  21. 1089
  22. 64
  23. 18
  24. 5
  25. 98765432
  26. 3
  27. 4000
  28. 12
  29. 12
  30. 700
  31. 56
  32. 19
  33. 9
  34. 27
  35. 9
  36. 28
  37. 54
  38. Tuesday
  39. 1
  40. 54

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