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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 918 · 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. 1.693 + 396 =
  2. 2.A piggy bank has 6 coins of ₹5 and 11 coins of ₹2. How many rupees are in it?
  3. 3.If today is Saturday, what day will it be after 33 days? (a) Wednesday (b) Sunday (c) Friday (d) Thursday
  4. 4.Magic trick! Think of 8. Double it, add 4, halve it, then take away 8. What number do you get?
  5. 5.9 × 8 = 7? — what is the missing digit?
  6. 6.1 + 2 + 3 + … + 72 =
  7. 7.3 × 9 =
  8. 8.9 × 4 = ?6 — what is the missing digit?
  9. 9.1 + 2 + 3 + … + 56 =
  10. 10.1 + 2 + 3 + … + 20 =
  11. 11.What comes next? 36, 49, 64, 81, ? (a) 102 (b) 101 (c) 100 (d) 98
  12. 12.What comes next? 8, 15, 22, 29, ? (a) 37 (b) 29 (c) 36 (d) 43
  13. 13.What comes next? 12, 17, 22, 27, ? (a) 32 (b) 33 (c) 37 (d) 27
  14. 14.1 + 3 + 5 + … + 25 =
  15. 15.1234 × 9 + 5 =
  16. 16.123456 × 8 + 6 =
  17. 17.1 + 3 + 5 + … + 43 =
  18. 18.?537 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  19. 19.1 + 2 + 3 + … + 34 =
  20. 20.12345679 × 81 =
  21. 21.The 9th of a month is a Saturday. What day is the 24th of the same month? (a) Saturday (b) Wednesday (c) Sunday (d) Monday
  22. 22.33 × ? = 3300
  23. 23.?723 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  24. 24.?907 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  25. 25.9 × 7 = 6? — what is the missing digit?
  26. 26.Double 86 =
  27. 27.40 × 4 =
  28. 28.1 + 3 + 5 + … + 17 =
  29. 29.12 × 9 + 3 =
  30. 30.A girl is 5 years old and her brother is 6 years older. How old will her brother be in 7 years?
  31. 31.36 × 4 =
  32. 32.2 × 9 =
  33. 33.Double 19 =
  34. 34.A piggy bank has 12 coins of ₹5 and 4 coins of ₹2. How many rupees are in it?
  35. 35.A girl is 6 years old and her brother is 2 years older. How old will her brother be in 8 years?
  36. 36.5?5 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  37. 37.If today is Tuesday, what day was it 23 days ago? (a) Wednesday (b) Saturday (c) Sunday (d) Monday
  38. 38.Take 34 and take away the sum of its digits. What do you get?
  39. 39.281 × 10 =
  40. 40.1 + 2 + 3 + … + 58 =

Answer key

  1. 1089
  2. 52
  3. Thursday
  4. 2
  5. 2
  6. 2628
  7. 27
  8. 3
  9. 1596
  10. 210
  11. 100
  12. 36
  13. 32
  14. 169
  15. 11111
  16. 987654
  17. 484
  18. 3
  19. 595
  20. 999999999
  21. Sunday
  22. 100
  23. 6
  24. 2
  25. 3
  26. 172
  27. 160
  28. 81
  29. 111
  30. 18
  31. 144
  32. 18
  33. 38
  34. 68
  35. 16
  36. 8
  37. Sunday
  38. 27
  39. 2810
  40. 1711

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