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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 676 · 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.If today is Wednesday, what day will it be after 62 days? (a) Monday (b) Tuesday (c) Wednesday (d) Friday
  2. 2.Half of 54 =
  3. 3.Double 26 =
  4. 4.1 × 9 =
  5. 5.What comes next? 3, 6, 12, 24, ? (a) 49 (b) 48 (c) 36 (d) 42
  6. 6.I thought of a number, multiplied it by 4 and added 7. I got 67. What was my number?
  7. 7.A father is 36 years old and his son is 14. How old was the father when the son was born?
  8. 8.I thought of a number, added 4 and then doubled it. I got 24. What was my number?
  9. 9.14 × ? = 140
  10. 10.39 × 4 =
  11. 11.1 + 2 + 3 + … + 26 =
  12. 12.5?99 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  13. 13.25 × ? = 2500
  14. 14.1 + 2 + 3 + … + 77 =
  15. 15.What comes next? 4, 12, 20, 28, ? (a) 36 (b) 37 (c) 28 (d) 44
  16. 16.89?4 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  17. 17.1 + 2 + 3 + … + 33 =
  18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
  19. 19.Double 81 =
  20. 20.Magic square (every row, column and diagonal has the same total): 11 16 ? | 10 12 14 | 15 8 13. What is the missing number?
  21. 21.47 × 4 =
  22. 22.9 × 7 = ?3 — what is the missing digit?
  23. 23.A father is 37 years old and his son is 5. How old was the father when the son was born?
  24. 24.11 × 4 =
  25. 25.27 × 4 =
  26. 26.What comes next? 36, 49, 64, 81, ? (a) 98 (b) 101 (c) 102 (d) 100
  27. 27.1 + 2 + 3 + … + 75 =
  28. 28.9 × 8 = ?2 — what is the missing digit?
  29. 29.You have 7 coins. Each coin is ₹1 or ₹2, and together they make ₹11. How many ₹2 coins do you have?
  30. 30.9 × 4 = 3? — what is the missing digit?
  31. 31.Magic square (every row, column and diagonal has the same total): 14 7 12 | 9 11 13 | 10 ? 8. What is the missing number?
  32. 32.9 × 10 = 9? — what is the missing digit?
  33. 33.5?38 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  34. 34.Magic trick! Think of 4. Double it, add 6, halve it, then take away 4. What number do you get?
  35. 35.31 × ? = 31000
  36. 36.45 × 4 =
  37. 37.23 × 4 =
  38. 38.396 + 693 =
  39. 39.I thought of a number, added 3 and then doubled it. I got 46. What was my number?
  40. 40.9 × 5 = 4? — what is the missing digit?

Answer key

  1. Tuesday
  2. 27
  3. 52
  4. 9
  5. 48
  6. 15
  7. 22
  8. 8
  9. 10
  10. 156
  11. 351
  12. 4
  13. 100
  14. 3003
  15. 36
  16. 6
  17. 561
  18. 297
  19. 162
  20. 9
  21. 188
  22. 6
  23. 32
  24. 44
  25. 108
  26. 100
  27. 2850
  28. 7
  29. 4
  30. 6
  31. 15
  32. 0
  33. 2
  34. 3
  35. 1000
  36. 180
  37. 92
  38. 1089
  39. 20
  40. 5

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