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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 827 · 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. 1.42 × ? = 42000
  2. 2.40 × 1000 =
  3. 3.1 + 2 + 3 + … + 48 =
  4. 4.Take 31 and take away the sum of its digits. What do you get?
  5. 5.4 × 1000 =
  6. 6.The 3rd of a month is a Wednesday. What day is the 15th of the same month? (a) Sunday (b) Thursday (c) Monday (d) Tuesday
  7. 7.49 × 4 =
  8. 8.You have 14 coins. Each coin is ₹1 or ₹2, and together they make ₹17. How many ₹2 coins do you have?
  9. 9.28 × 4 =
  10. 10.If today is Friday, what day will it be after 35 days? (a) Saturday (b) Friday (c) Monday (d) Thursday
  11. 11.Magic square (every row, column and diagonal has the same total): 19 ? 23 | 21 17 13 | 11 25 15. What is the missing number?
  12. 12.In 2 years a boy will be 13 years old. How old was he 3 years ago?
  13. 13.9 × 3 = ?7 — what is the missing digit?
  14. 14.5 × 9 =
  15. 15.9 × 1 =
  16. 16.Magic square (every row, column and diagonal has the same total): 18 15 30 | 33 21 9 | 12 ? 24. What is the missing number?
  17. 17.A piggy bank has 7 coins of ₹5 and 12 coins of ₹2. How many rupees are in it?
  18. 18.Magic square (every row, column and diagonal has the same total): 2 ? 4 | 7 5 3 | 6 1 8. What is the missing number?
  19. 19.12 × 8 + 2 =
  20. 20.9 × 5 =
  21. 21.9 × 10 = 9? — what is the missing digit?
  22. 22.If today is Saturday, what day will it be after 60 days? (a) Saturday (b) Thursday (c) Wednesday (d) Tuesday
  23. 23.1 + 2 + 3 + … + 50 =
  24. 24.A father is 40 years old and his son is 12. How old was the father when the son was born?
  25. 25.297 + 792 =
  26. 26.10 × 4 =
  27. 27.1 + 3 + 5 + … + 31 =
  28. 28.58 × 100 =
  29. 29.9 × 5 = 4? — what is the missing digit?
  30. 30.49 × 100 =
  31. 31.37 × 15 =
  32. 32.88?6 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  33. 33.9 × 3 = 2? — what is the missing digit?
  34. 34.Magic square (every row, column and diagonal has the same total): 6 5 ? | 11 7 3 | 4 9 8. What is the missing number?
  35. 35.87 × 100 =
  36. 36.Magic square (every row, column and diagonal has the same total): ? 6 16 | 18 10 2 | 4 14 12. What is the missing number?
  37. 37.If today is Friday, what day was it 18 days ago? (a) Monday (b) Sunday (c) Thursday (d) Tuesday
  38. 38.24 × ? = 2400
  39. 39.Magic square (every row, column and diagonal has the same total): 9 4 11 | 10 8 ? | 5 12 7. What is the missing number?
  40. 40.1 + 2 + 3 + … + 27 =

Answer key

  1. 1000
  2. 40000
  3. 1176
  4. 27
  5. 4000
  6. Monday
  7. 196
  8. 3
  9. 112
  10. Friday
  11. 9
  12. 8
  13. 2
  14. 45
  15. 9
  16. 27
  17. 59
  18. 9
  19. 98
  20. 45
  21. 0
  22. Wednesday
  23. 1275
  24. 28
  25. 1089
  26. 40
  27. 256
  28. 5800
  29. 5
  30. 4900
  31. 555
  32. 5
  33. 7
  34. 10
  35. 8700
  36. 8
  37. Monday
  38. 100
  39. 6
  40. 378

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