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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 884 · 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. 1.27 × 4 =
  2. 2.9 × 4 = ?6 — what is the missing digit?
  3. 3.9 × 6 = 5? — what is the missing digit?
  4. 4.Take 11 and take away the sum of its digits. What do you get?
  5. 5.The 2nd of a month is a Sunday. What day is the 24th of the same month? (a) Thursday (b) Tuesday (c) Monday (d) Sunday
  6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
  7. 7.71 × ? = 7100
  8. 8.The 1st of a month is a Sunday. What day is the 11th of the same month? (a) Tuesday (b) Saturday (c) Thursday (d) Wednesday
  9. 9.168 × ? = 1680
  10. 10.What comes next? 11, 15, 19, 23, ? (a) 23 (b) 31 (c) 28 (d) 27
  11. 11.1 + 2 + 3 + … + 76 =
  12. 12.The 4th of a month is a Monday. What day is the 23rd of the same month? (a) Sunday (b) Friday (c) Saturday (d) Tuesday
  13. 13.Take 23 and take away the sum of its digits. What do you get?
  14. 14.9 × 2 =
  15. 15.1?38 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  16. 16.Magic square (every row, column and diagonal has the same total): 30 15 ? | 9 21 33 | 24 27 12. What is the missing number?
  17. 17.9 × 7 =
  18. 18.537? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  19. 19.?72 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  20. 20.188 × 10 =
  21. 21.2 × 9 =
  22. 22.The 5th of a month is a Thursday. What day is the 30th of the same month? (a) Thursday (b) Tuesday (c) Sunday (d) Monday
  23. 23.What comes next? 1, 2, 4, 8, ? (a) 12 (b) 14 (c) 17 (d) 16
  24. 24.What comes next? 4, 8, 16, 32, ? (a) 48 (b) 56 (c) 64 (d) 65
  25. 25.10 × 4 =
  26. 26.Take 41 and take away the sum of its digits. What do you get?
  27. 27.Magic square (every row, column and diagonal has the same total): ? 6 27 | 24 18 12 | 9 30 15. What is the missing number?
  28. 28.Half of 152 =
  29. 29.A girl is 8 years old and her brother is 2 years older. How old will her brother be in 3 years?
  30. 30.10 × 9 =
  31. 31.What comes next? 19, 26, 33, 40, ? (a) 48 (b) 40 (c) 47 (d) 54
  32. 32.A piggy bank has 8 coins of ₹5 and 13 coins of ₹2. How many rupees are in it?
  33. 33.Magic square (every row, column and diagonal has the same total): 22 ? 18 | 12 16 20 | 14 24 10. What is the missing number?
  34. 34.9 × 8 =
  35. 35.The 9th of a month is a Saturday. What day is the 17th of the same month? (a) Monday (b) Sunday (c) Wednesday (d) Saturday
  36. 36.9 × 4 = 3? — what is the missing digit?
  37. 37.What comes next? 36, 49, 64, 81, ? (a) 101 (b) 100 (c) 102 (d) 98
  38. 38.Magic square (every row, column and diagonal has the same total): 7 6 11 | 12 ? 4 | 5 10 9. What is the missing number?
  39. 39.5 × 9 =
  40. 40.12345679 × 81 =

Answer key

  1. 108
  2. 3
  3. 4
  4. 9
  5. Monday
  6. 693
  7. 100
  8. Wednesday
  9. 10
  10. 27
  11. 2926
  12. Saturday
  13. 18
  14. 18
  15. 6
  16. 18
  17. 63
  18. 3
  19. 9
  20. 1880
  21. 18
  22. Monday
  23. 16
  24. 64
  25. 40
  26. 36
  27. 21
  28. 76
  29. 13
  30. 90
  31. 47
  32. 66
  33. 8
  34. 72
  35. Sunday
  36. 6
  37. 100
  38. 8
  39. 45
  40. 999999999

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