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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 916 · 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. 2.1 + 3 + 5 + … + 47 =
  3. 3.Magic square (every row, column and diagonal has the same total): 15 ? 11 | 13 17 21 | 23 9 19. What is the missing number?
  4. 4.Odd one out: which number is NOT in the 8 times table? (a) 44 (b) 24 (c) 32 (d) 16
  5. 5.12345679 × 45 =
  6. 6.12 × 8 + 2 =
  7. 7.32 × ? = 32000
  8. 8.9 × 6 = ?4 — what is the missing digit?
  9. 9.59 × 4 =
  10. 10.1 + 2 + 3 + … + 26 =
  11. 11.Take 880. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  12. 12.9 × 3 =
  13. 13.A girl is 11 years old and her brother is 5 years older. How old will her brother be in 4 years?
  14. 14.If today is Sunday, what day will it be after 17 days? (a) Thursday (b) Saturday (c) Wednesday (d) Tuesday
  15. 15.56 × 4 =
  16. 16.?472 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  17. 17.I thought of a number, multiplied it by 3 and added 7. I got 46. What was my number?
  18. 18.You have 7 coins. Each coin is ₹1 or ₹2, and together they make ₹8. How many ₹2 coins do you have?
  19. 19.18 × 4 =
  20. 20.47 × 4 =
  21. 21.The 7th of a month is a Monday. What day is the 26th of the same month? (a) Saturday (b) Sunday (c) Friday (d) Tuesday
  22. 22.9 × 7 = 6? — what is the missing digit?
  23. 23.37 × 3 =
  24. 24.8 × 9 =
  25. 25.1 + 2 + 3 + … + 27 =
  26. 26.A girl is 7 years old and her brother is 6 years older. How old will her brother be in 5 years?
  27. 27.9 × 3 = 2? — what is the missing digit?
  28. 28.54 × 4 =
  29. 29.?69 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  30. 30.12345679 × 36 =
  31. 31.Take 48 and take away the sum of its digits. What do you get?
  32. 32.Magic square (every row, column and diagonal has the same total): 11 16 9 | 10 12 14 | 15 ? 13. What is the missing number?
  33. 33.?313 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  34. 34.If today is Monday, what day was it 18 days ago? (a) Friday (b) Thursday (c) Sunday (d) Wednesday
  35. 35.In 3 years a boy will be 14 years old. How old was he 3 years ago?
  36. 36.Double 75 =
  37. 37.Take 30 and take away the sum of its digits. What do you get?
  38. 38.You have 11 coins. Each coin is ₹1 or ₹2, and together they make ₹12. How many ₹2 coins do you have?
  39. 39.43 × ? = 43000
  40. 40.What comes next? 25, 36, 49, 64, ? (a) 83 (b) 79 (c) 81 (d) 82

Answer key

  1. 1089
  2. 576
  3. 25
  4. 44
  5. 555555555
  6. 98
  7. 1000
  8. 5
  9. 236
  10. 351
  11. 792
  12. 27
  13. 20
  14. Wednesday
  15. 224
  16. 5
  17. 13
  18. 1
  19. 72
  20. 188
  21. Saturday
  22. 3
  23. 111
  24. 72
  25. 378
  26. 18
  27. 7
  28. 216
  29. 3
  30. 444444444
  31. 36
  32. 8
  33. 2
  34. Thursday
  35. 8
  36. 150
  37. 27
  38. 1
  39. 1000
  40. 81

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