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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 911 · 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.If today is Sunday, what day will it be after 24 days? (a) Tuesday (b) Wednesday (c) Saturday (d) Thursday
  2. 2.What comes next? 19, 26, 33, 40, ? (a) 48 (b) 40 (c) 47 (d) 54
  3. 3.If today is Friday, what day will it be after 19 days? (a) Tuesday (b) Wednesday (c) Thursday (d) Saturday
  4. 4.1 + 2 + 3 + … + 59 =
  5. 5.A girl is 7 years old and her brother is 5 years older. How old will her brother be in 6 years?
  6. 6.A piggy bank has 11 coins of ₹5 and 10 coins of ₹2. How many rupees are in it?
  7. 7.9 × 4 =
  8. 8.9 × 7 = 6? — what is the missing digit?
  9. 9.11111 × 11111 =
  10. 10.1 + 2 + 3 + … + 68 =
  11. 11.Do the 1089 trick with 550: reverse and subtract, then reverse that answer and add. What do you get?
  12. 12.9 × 6 = ?4 — what is the missing digit?
  13. 13.Half of 46 =
  14. 14.9 × 10 = ?0 — what is the missing digit?
  15. 15.69 × 100 =
  16. 16.1 + 3 + 5 + … + 31 =
  17. 17.The 9th of a month is a Tuesday. What day is the 18th of the same month? (a) Wednesday (b) Sunday (c) Thursday (d) Friday
  18. 18.9 × 2 =
  19. 19.46 × 4 =
  20. 20.A girl is 7 years old and her brother is 2 years older. How old will her brother be in 3 years?
  21. 21.9 × 4 = ?6 — what is the missing digit?
  22. 22.If today is Monday, what day was it 27 days ago? (a) Monday (b) Friday (c) Tuesday (d) Wednesday
  23. 23.198 + 891 =
  24. 24.30 × 4 =
  25. 25.Magic square (every row, column and diagonal has the same total): 12 17 10 | 11 13 ? | 16 9 14. What is the missing number?
  26. 26.9 × 5 =
  27. 27.What comes next? 9, 16, 25, 36, ? (a) 51 (b) 49 (c) 47 (d) 50
  28. 28.Double 81 =
  29. 29.Magic square (every row, column and diagonal has the same total): 14 24 10 | ? 16 20 | 22 8 18. What is the missing number?
  30. 30.732 × 10 =
  31. 31.Double 23 =
  32. 32.5 × 9 =
  33. 33.The 3rd of a month is a Saturday. What day is the 27th of the same month? (a) Wednesday (b) Tuesday (c) Monday (d) Friday
  34. 34.Magic square (every row, column and diagonal has the same total): 13 ? 11 | 8 10 12 | 9 14 7. What is the missing number?
  35. 35.What comes next? 1, 4, 9, 16, ? (a) 23 (b) 27 (c) 26 (d) 25
  36. 36.3 × 9 =
  37. 37.1 + 2 + 3 + … + 74 =
  38. 38.1 + 3 + 5 + … + 49 =
  39. 39.What comes next? 2, 4, 8, 16, ? (a) 28 (b) 32 (c) 24 (d) 33
  40. 40.What comes next? 20, 23, 26, 29, ? (a) 33 (b) 35 (c) 32 (d) 29

Answer key

  1. Wednesday
  2. 47
  3. Wednesday
  4. 1770
  5. 18
  6. 75
  7. 36
  8. 3
  9. 123454321
  10. 2346
  11. 1089
  12. 5
  13. 23
  14. 9
  15. 6900
  16. 256
  17. Thursday
  18. 18
  19. 184
  20. 12
  21. 3
  22. Tuesday
  23. 1089
  24. 120
  25. 15
  26. 45
  27. 49
  28. 162
  29. 12
  30. 7320
  31. 46
  32. 45
  33. Tuesday
  34. 6
  35. 25
  36. 27
  37. 2775
  38. 625
  39. 32
  40. 32

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