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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 975 · 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.What comes next? 18, 23, 28, 33, ? (a) 39 (b) 43 (c) 38 (d) 33
  2. 2.73 × 10 =
  3. 3.4?78 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  4. 4.36 × ? = 36000
  5. 5.9 × 4 = 3? — what is the missing digit?
  6. 6.A father is 34 years old and his son is 5. How old was the father when the son was born?
  7. 7.Double 54 =
  8. 8.Magic square (every row, column and diagonal has the same total): 10 17 12 | 15 13 11 | 14 ? 16. What is the missing number?
  9. 9.The 8th of a month is a Tuesday. What day is the 18th of the same month? (a) Saturday (b) Friday (c) Monday (d) Thursday
  10. 10.A father is 43 years old and his son is 12. How old was the father when the son was born?
  11. 11.9 × 10 =
  12. 12.36 × 100 =
  13. 13.9 × 5 = ?5 — what is the missing digit?
  14. 14.Take 56 and take away the sum of its digits. What do you get?
  15. 15.In 2 years a boy will be 10 years old. How old was he 3 years ago?
  16. 16.9 × 9 = ?1 — what is the missing digit?
  17. 17.1 + 3 + 5 + … + 29 =
  18. 18.You have 5 coins. Each coin is ₹1 or ₹2, and together they make ₹7. How many ₹2 coins do you have?
  19. 19.1 + 3 + 5 + … + 23 =
  20. 20.Double 91 =
  21. 21.14 × 4 =
  22. 22.A girl is 11 years old and her brother is 3 years older. How old will her brother be in 8 years?
  23. 23.1 + 3 + 5 + … + 13 =
  24. 24.29 × 4 =
  25. 25.The 4th of a month is a Monday. What day is the 30th of the same month? (a) Friday (b) Saturday (c) Sunday (d) Tuesday
  26. 26.1 + 3 + 5 + … + 19 =
  27. 27.Magic square (every row, column and diagonal has the same total): ? 5 6 | 3 7 11 | 8 9 4. What is the missing number?
  28. 28.499? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  29. 29.29 × 1000 =
  30. 30.If today is Monday, what day was it 41 days ago? (a) Tuesday (b) Wednesday (c) Friday (d) Monday
  31. 31.If today is Friday, what day will it be after 63 days? (a) Friday (b) Thursday (c) Saturday (d) Monday
  32. 32.1 + 2 + 3 + … + 74 =
  33. 33.78?9 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  34. 34.24 × ? = 2400
  35. 35.8 × 9 =
  36. 36.9 × 3 = ?7 — what is the missing digit?
  37. 37.?562 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  38. 38.Magic square (every row, column and diagonal has the same total): 11 10 15 | 16 ? 8 | 9 14 13. What is the missing number?
  39. 39.Double 17 =
  40. 40.16 × 4 =

Answer key

  1. 38
  2. 730
  3. 8
  4. 1000
  5. 6
  6. 29
  7. 108
  8. 9
  9. Friday
  10. 31
  11. 90
  12. 3600
  13. 4
  14. 45
  15. 5
  16. 8
  17. 225
  18. 2
  19. 144
  20. 182
  21. 56
  22. 22
  23. 49
  24. 116
  25. Saturday
  26. 100
  27. 10
  28. 5
  29. 29000
  30. Tuesday
  31. Friday
  32. 2775
  33. 3
  34. 100
  35. 72
  36. 2
  37. 5
  38. 12
  39. 34
  40. 64

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