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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 625 · 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.Half of 152 =
  2. 2.9 × 7 = 6? — what is the missing digit?
  3. 3.1 + 3 + 5 + … + 31 =
  4. 4.735 × 10 =
  5. 5.1 + 2 + 3 + … + 96 =
  6. 6.Magic square (every row, column and diagonal has the same total): 7 8 3 | 2 6 ? | 9 4 5. What is the missing number?
  7. 7.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
  8. 8.9 × 3 = 2? — what is the missing digit?
  9. 9.What comes next? 12, 15, 18, 21, ? (a) 25 (b) 21 (c) 27 (d) 24
  10. 10.30 × 4 =
  11. 11.Double 89 =
  12. 12.9 × 3 = ?7 — what is the missing digit?
  13. 13.?852 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  14. 14.The 6th of a month is a Thursday. What day is the 24th of the same month? (a) Monday (b) Tuesday (c) Thursday (d) Sunday
  15. 15.You have 5 coins. Each coin is ₹1 or ₹2, and together they make ₹9. How many ₹2 coins do you have?
  16. 16.Half of 64 =
  17. 17.60 × 4 =
  18. 18.23 × 4 =
  19. 19.28?6 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  20. 20.?84 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  21. 21.Take 67 and take away the sum of its digits. What do you get?
  22. 22.40?8 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  23. 23.9 × 10 = 9? — what is the missing digit?
  24. 24.?906 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  25. 25.The 7th of a month is a Friday. What day is the 28th of the same month? (a) Monday (b) Thursday (c) Friday (d) Saturday
  26. 26.I thought of a number, multiplied it by 5 and added 8. I got 63. What was my number?
  27. 27.Magic square (every row, column and diagonal has the same total): 15 12 27 | 30 ? 6 | 9 24 21. What is the missing number?
  28. 28.Magic square (every row, column and diagonal has the same total): 11 10 15 | 16 12 ? | 9 14 13. What is the missing number?
  29. 29.9 × 4 =
  30. 30.?367 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  31. 31.The 7th of a month is a Thursday. What day is the 24th of the same month? (a) Saturday (b) Monday (c) Sunday (d) Wednesday
  32. 32.21 × 4 =
  33. 33.55 × ? = 550
  34. 34.The 1st of a month is a Saturday. What day is the 21st of the same month? (a) Saturday (b) Monday (c) Thursday (d) Friday
  35. 35.Magic square (every row, column and diagonal has the same total): 27 12 33 | 30 24 ? | 15 36 21. What is the missing number?
  36. 36.1 + 2 + 3 + … + 84 =
  37. 37.1 + 3 + 5 + … + 35 =
  38. 38.9 × 5 =
  39. 39.Think of 7. Multiply it by 4, then add 3. What number do you end with?
  40. 40.47 × ? = 4700

Answer key

  1. 76
  2. 3
  3. 256
  4. 7350
  5. 4656
  6. 10
  7. 1089
  8. 7
  9. 24
  10. 120
  11. 178
  12. 2
  13. 3
  14. Monday
  15. 4
  16. 32
  17. 240
  18. 92
  19. 2
  20. 6
  21. 54
  22. 6
  23. 0
  24. 3
  25. Friday
  26. 11
  27. 18
  28. 8
  29. 36
  30. 2
  31. Sunday
  32. 84
  33. 10
  34. Friday
  35. 18
  36. 3570
  37. 324
  38. 45
  39. 31
  40. 100

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