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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 657 · 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. 1.9 × 10 = 9? — what is the missing digit?
  2. 2.If today is Tuesday, what day was it 52 days ago? (a) Sunday (b) Tuesday (c) Friday (d) Saturday
  3. 3.Odd one out: which number is NOT in the 9 times table? (a) 54 (b) 72 (c) 27 (d) 57
  4. 4.1 + 2 + 3 + … + 53 =
  5. 5.5 × 9 =
  6. 6.43 × ? = 43000
  7. 7.What comes next? 4, 8, 16, 32, ? (a) 48 (b) 56 (c) 65 (d) 64
  8. 8.47 × 4 =
  9. 9.Magic square (every row, column and diagonal has the same total): 18 20 10 | ? 16 24 | 22 12 14. What is the missing number?
  10. 10.46 × 4 =
  11. 11.9 × 6 = ?4 — what is the missing digit?
  12. 12.Magic square (every row, column and diagonal has the same total): 14 9 16 | ? 13 11 | 10 17 12. What is the missing number?
  13. 13.9 × 5 = ?5 — what is the missing digit?
  14. 14.I thought of a number, multiplied it by 5 and added 1. I got 11. What was my number?
  15. 15.Double 16 =
  16. 16.8 × 9 =
  17. 17.Magic trick! Think of 11. Double it, add 14, halve it, then take away 11. What number do you get?
  18. 18.9 × 2 =
  19. 19.52 × 4 =
  20. 20.37 × 3 =
  21. 21.58 × 4 =
  22. 22.You have 14 coins. Each coin is ₹1 or ₹2, and together they make ₹23. How many ₹2 coins do you have?
  23. 23.Half of 38 =
  24. 24.1234567 × 8 + 7 =
  25. 25.111111 × 111111 =
  26. 26.Magic square (every row, column and diagonal has the same total): 9 14 13 | 16 12 8 | 11 10 ?. What is the missing number?
  27. 27.What comes next? 16, 25, 36, 49, ? (a) 66 (b) 62 (c) 64 (d) 65
  28. 28.46 × ? = 46000
  29. 29.What comes next? 3, 6, 12, 24, ? (a) 48 (b) 42 (c) 36 (d) 49
  30. 30.9 × 1 =
  31. 31.If today is Thursday, what day was it 10 days ago? (a) Tuesday (b) Thursday (c) Sunday (d) Monday
  32. 32.Double 14 =
  33. 33.728 × ? = 7280
  34. 34.I thought of a number, added 8 and then doubled it. I got 42. What was my number?
  35. 35.9 × 3 =
  36. 36.1 + 2 + 3 + … + 55 =
  37. 37.I thought of a number, multiplied it by 4 and added 3. I got 47. What was my number?
  38. 38.A father is 41 years old and his son is 14. How old was the father when the son was born?
  39. 39.21 × ? = 21000
  40. 40.909 × 10 =

Answer key

  1. 0
  2. Saturday
  3. 57
  4. 1431
  5. 45
  6. 1000
  7. 64
  8. 188
  9. 8
  10. 184
  11. 5
  12. 15
  13. 4
  14. 2
  15. 32
  16. 72
  17. 7
  18. 18
  19. 208
  20. 111
  21. 232
  22. 9
  23. 19
  24. 9876543
  25. 12345654321
  26. 15
  27. 64
  28. 1000
  29. 48
  30. 9
  31. Monday
  32. 28
  33. 10
  34. 13
  35. 27
  36. 1540
  37. 11
  38. 27
  39. 1000
  40. 9090

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