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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 478 · 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. 1.1 × 9 =
  2. 2.37 × 3 =
  3. 3.2?18 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  4. 4.9 × 2 = ?8 — what is the missing digit?
  5. 5.2?05 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  6. 6.Think of 4. Multiply it by 2, then add 6. What number do you end with?
  7. 7.The 2nd of a month is a Friday. What day is the 26th of the same month? (a) Thursday (b) Tuesday (c) Monday (d) Sunday
  8. 8.If today is Saturday, what day will it be after 27 days? (a) Monday (b) Saturday (c) Friday (d) Thursday
  9. 9.27 × 4 =
  10. 10.Magic square (every row, column and diagonal has the same total): 21 6 27 | 24 18 12 | ? 30 15. What is the missing number?
  11. 11.Odd one out: which number is NOT in the 5 times table? (a) 41 (b) 25 (c) 15 (d) 35
  12. 12.12345678 × 9 + 9 =
  13. 13.49 × 4 =
  14. 14.71 × ? = 7100
  15. 15.What comes next? 3, 11, 19, 27, ? (a) 27 (b) 35 (c) 43 (d) 36
  16. 16.9 × 7 = 6? — what is the missing digit?
  17. 17.5 × ? = 5000
  18. 18.3 × 9 =
  19. 19.What comes next? 19, 26, 33, 40, ? (a) 54 (b) 40 (c) 47 (d) 48
  20. 20.12345679 × 63 =
  21. 21.The 3rd of a month is a Sunday. What day is the 30th of the same month? (a) Tuesday (b) Sunday (c) Saturday (d) Friday
  22. 22.You have 13 coins. Each coin is ₹1 or ₹2, and together they make ₹14. How many ₹2 coins do you have?
  23. 23.A father is 34 years old and his son is 9. How old was the father when the son was born?
  24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
  25. 25.43 × 1000 =
  26. 26.What comes next? 25, 36, 49, 64, ? (a) 81 (b) 83 (c) 79 (d) 82
  27. 27.639? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  28. 28.9 × 3 = ?7 — what is the missing digit?
  29. 29.3 × 100 =
  30. 30.I thought of a number, multiplied it by 4 and added 8. I got 56. What was my number?
  31. 31.9 × 9 = ?1 — what is the missing digit?
  32. 32.Half of 152 =
  33. 33.101 × ? = 1010
  34. 34.Magic square (every row, column and diagonal has the same total): ? 11 32 | 29 23 17 | 14 35 20. What is the missing number?
  35. 35.Odd one out: which number is NOT in the 9 times table? (a) 45 (b) 33 (c) 18 (d) 27
  36. 36.6 × 4 =
  37. 37.1 + 2 + 3 + … + 43 =
  38. 38.655 × 10 =
  39. 39.Magic square (every row, column and diagonal has the same total): 4 11 6 | 9 ? 5 | 8 3 10. What is the missing number?
  40. 40.10 × 4 =

Answer key

  1. 9
  2. 111
  3. 7
  4. 1
  5. 2
  6. 14
  7. Monday
  8. Friday
  9. 108
  10. 9
  11. 41
  12. 111111111
  13. 196
  14. 100
  15. 35
  16. 3
  17. 1000
  18. 27
  19. 47
  20. 777777777
  21. Saturday
  22. 1
  23. 25
  24. 396
  25. 43000
  26. 81
  27. 9
  28. 2
  29. 300
  30. 12
  31. 8
  32. 76
  33. 10
  34. 26
  35. 33
  36. 24
  37. 946
  38. 6550
  39. 7
  40. 40

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