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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 144 · 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 × 9 = ?1 — what is the missing digit?
  2. 2.37 × 4 =
  3. 3.1 × 9 =
  4. 4.29 × 1000 =
  5. 5.12 × 9 + 3 =
  6. 6.If today is Wednesday, what day will it be after 71 days? (a) Sunday (b) Wednesday (c) Friday (d) Thursday
  7. 7.Take 528. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  8. 8.A girl is 12 years old and her brother is 6 years older. How old will her brother be in 4 years?
  9. 9.9 × 8 =
  10. 10.The 3rd of a month is a Monday. What day is the 25th of the same month? (a) Tuesday (b) Friday (c) Monday (d) Wednesday
  11. 11.3 × 9 =
  12. 12.If today is Saturday, what day will it be after 31 days? (a) Friday (b) Monday (c) Tuesday (d) Wednesday
  13. 13.The 3rd of a month is a Sunday. What day is the 21st of the same month? (a) Wednesday (b) Sunday (c) Friday (d) Thursday
  14. 14.45 × 4 =
  15. 15.?026 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  16. 16.Take 80 and take away the sum of its digits. What do you get?
  17. 17.1 + 3 + 5 + … + 11 =
  18. 18.If today is Thursday, what day was it 13 days ago? (a) Monday (b) Saturday (c) Thursday (d) Friday
  19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
  20. 20.Magic square (every row, column and diagonal has the same total): 20 10 24 | 22 18 14 | 12 26 ?. What is the missing number?
  21. 21.What comes next? 7, 9, 11, 13, ? (a) 16 (b) 13 (c) 15 (d) 17
  22. 22.Magic square (every row, column and diagonal has the same total): ? 21 6 | 3 15 27 | 24 9 12. What is the missing number?
  23. 23.Take 66 and take away the sum of its digits. What do you get?
  24. 24.333? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  25. 25.I thought of a number, multiplied it by 3 and added 2. I got 20. What was my number?
  26. 26.Take 420. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  27. 27.If today is Wednesday, what day will it be after 94 days? (a) Tuesday (b) Sunday (c) Friday (d) Saturday
  28. 28.495 + 594 =
  29. 29.?470 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  30. 30.You have 10 coins. Each coin is ₹1 or ₹2, and together they make ₹17. How many ₹2 coins do you have?
  31. 31.9 × 1 =
  32. 32.What comes next? 2, 4, 8, 16, ? (a) 28 (b) 33 (c) 24 (d) 32
  33. 33.What comes next? 8, 10, 12, 14, ? (a) 17 (b) 16 (c) 18 (d) 14
  34. 34.What comes next? 16, 25, 36, 49, ? (a) 62 (b) 65 (c) 64 (d) 66
  35. 35.If today is Friday, what day will it be after 13 days? (a) Friday (b) Sunday (c) Thursday (d) Wednesday
  36. 36.9 × 4 = 3? — what is the missing digit?
  37. 37.48 × 4 =
  38. 38.What comes next? 3, 6, 9, 12, ? (a) 12 (b) 16 (c) 18 (d) 15
  39. 39.9 × 7 = 6? — what is the missing digit?
  40. 40.What comes next? 1, 2, 4, 8, ? (a) 16 (b) 14 (c) 17 (d) 12

Answer key

  1. 8
  2. 148
  3. 9
  4. 29000
  5. 111
  6. Thursday
  7. 297
  8. 22
  9. 72
  10. Tuesday
  11. 27
  12. Tuesday
  13. Thursday
  14. 180
  15. 1
  16. 72
  17. 36
  18. Friday
  19. 297
  20. 16
  21. 15
  22. 18
  23. 54
  24. 9
  25. 6
  26. 396
  27. Saturday
  28. 1089
  29. 7
  30. 7
  31. 9
  32. 32
  33. 16
  34. 64
  35. Thursday
  36. 6
  37. 192
  38. 15
  39. 3
  40. 16

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