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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 894 · 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. 1.1234567 × 8 + 7 =
  2. 2.9 × 7 = ?3 — what is the missing digit?
  3. 3.Do the 1089 trick with 532: reverse and subtract, then reverse that answer and add. What do you get?
  4. 4.10 × 9 =
  5. 5.What comes next? 1, 8, 15, 22, ? (a) 30 (b) 22 (c) 29 (d) 36
  6. 6.Magic square (every row, column and diagonal has the same total): ? 21 6 | 3 15 27 | 24 9 12. What is the missing number?
  7. 7.1 + 3 + 5 + … + 11 =
  8. 8.11111 × 11111 =
  9. 9.If today is Thursday, what day was it 23 days ago? (a) Wednesday (b) Tuesday (c) Friday (d) Monday
  10. 10.If today is Thursday, what day will it be after 89 days? (a) Monday (b) Friday (c) Wednesday (d) Tuesday
  11. 11.495 × 10 =
  12. 12.9 × 6 = 5? — what is the missing digit?
  13. 13.Magic square (every row, column and diagonal has the same total): 29 14 17 | 8 20 ? | 23 26 11. What is the missing number?
  14. 14.Half of 66 =
  15. 15.792 + 297 =
  16. 16.What comes next? 5, 10, 20, 40, ? (a) 80 (b) 60 (c) 70 (d) 81
  17. 17.If today is Saturday, what day will it be after 52 days? (a) Tuesday (b) Monday (c) Friday (d) Wednesday
  18. 18.49 × 4 =
  19. 19.You have 8 coins. Each coin is ₹1 or ₹2, and together they make ₹14. How many ₹2 coins do you have?
  20. 20.9 × 4 = ?6 — what is the missing digit?
  21. 21.599 × ? = 5990
  22. 22.If today is Tuesday, what day was it 29 days ago? (a) Monday (b) Sunday (c) Thursday (d) Tuesday
  23. 23.9 × 9 =
  24. 24.What comes next? 7, 9, 11, 13, ? (a) 17 (b) 16 (c) 13 (d) 15
  25. 25.10?4 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  26. 26.Magic trick! Think of 16. Double it, add 6, halve it, then take away 16. What number do you get?
  27. 27.21 × 1000 =
  28. 28.If today is Tuesday, what day will it be after 24 days? (a) Monday (b) Thursday (c) Saturday (d) Friday
  29. 29.If today is Wednesday, what day was it 38 days ago? (a) Monday (b) Wednesday (c) Saturday (d) Sunday
  30. 30.9 × 1 =
  31. 31.4?8 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  32. 32.9 × 10 = 9? — what is the missing digit?
  33. 33.What comes next? 10, 13, 16, 19, ? (a) 19 (b) 25 (c) 23 (d) 22
  34. 34.Take 73 and take away the sum of its digits. What do you get?
  35. 35.Half of 122 =
  36. 36.Odd one out: which number is NOT in the 7 times table? (a) 34 (b) 28 (c) 42 (d) 35
  37. 37.Magic trick! Think of 19. Double it, add 12, halve it, then take away 19. What number do you get?
  38. 38.218? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  39. 39.9 × 4 = 3? — what is the missing digit?
  40. 40.What comes next? 2, 6, 10, 14, ? (a) 18 (b) 22 (c) 19 (d) 14

Answer key

  1. 9876543
  2. 6
  3. 1089
  4. 90
  5. 29
  6. 18
  7. 36
  8. 123454321
  9. Tuesday
  10. Tuesday
  11. 4950
  12. 4
  13. 32
  14. 33
  15. 1089
  16. 80
  17. Tuesday
  18. 196
  19. 6
  20. 3
  21. 10
  22. Monday
  23. 81
  24. 15
  25. 4
  26. 3
  27. 21000
  28. Friday
  29. Sunday
  30. 9
  31. 6
  32. 0
  33. 22
  34. 63
  35. 61
  36. 34
  37. 6
  38. 7
  39. 6
  40. 18

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