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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 531 · 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 Saturday, what day will it be after 55 days? (a) Friday (b) Monday (c) Thursday (d) Saturday
  2. 2.17 × 1000 =
  3. 3.?499 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  4. 4.9 × 9 = ?1 — what is the missing digit?
  5. 5.If today is Monday, what day was it 40 days ago? (a) Saturday (b) Tuesday (c) Thursday (d) Wednesday
  6. 6.Magic square (every row, column and diagonal has the same total): 7 12 5 | 6 ? 10 | 11 4 9. What is the missing number?
  7. 7.116? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  8. 8.52 × 4 =
  9. 9.Odd one out: which number is NOT in the 4 times table? (a) 28 (b) 32 (c) 33 (d) 16
  10. 10.9 × 8 = ?2 — what is the missing digit?
  11. 11.Magic square (every row, column and diagonal has the same total): 16 13 ? | 31 19 7 | 10 25 22. What is the missing number?
  12. 12.6 × 9 =
  13. 13.Double 47 =
  14. 14.Odd one out: which number is NOT in the 4 times table? (a) 32 (b) 24 (c) 12 (d) 25
  15. 15.1 + 2 + 3 + … + 13 =
  16. 16.495 + 594 =
  17. 17.A girl is 8 years old and her brother is 5 years older. How old will her brother be in 6 years?
  18. 18.You have 13 coins. Each coin is ₹1 or ₹2, and together they make ₹17. How many ₹2 coins do you have?
  19. 19.9 × 5 =
  20. 20.If today is Wednesday, what day will it be after 34 days? (a) Monday (b) Friday (c) Wednesday (d) Tuesday
  21. 21.5 × 9 =
  22. 22.1 + 2 + 3 + … + 22 =
  23. 23.The 3rd of a month is a Tuesday. What day is the 20th of the same month? (a) Monday (b) Thursday (c) Saturday (d) Friday
  24. 24.Magic square (every row, column and diagonal has the same total): 13 18 ? | 12 14 16 | 17 10 15. What is the missing number?
  25. 25.8 × 4 =
  26. 26.Half of 108 =
  27. 27.9 × 9 =
  28. 28.Magic trick! Think of 17. Double it, add 16, halve it, then take away 17. What number do you get?
  29. 29.1 + 2 + 3 + … + 69 =
  30. 30.14 × 4 =
  31. 31.1 + 2 + 3 + … + 78 =
  32. 32.If today is Thursday, what day will it be after 20 days? (a) Tuesday (b) Thursday (c) Saturday (d) Wednesday
  33. 33.Half of 76 =
  34. 34.1234567 × 9 + 8 =
  35. 35.What comes next? 9, 16, 25, 36, ? (a) 49 (b) 47 (c) 51 (d) 50
  36. 36.29 × 4 =
  37. 37.A piggy bank has 8 coins of ₹5 and 11 coins of ₹2. How many rupees are in it?
  38. 38.9 × 2 =
  39. 39.Do the 1089 trick with 710: reverse and subtract, then reverse that answer and add. What do you get?
  40. 40.9 × 10 = 9? — what is the missing digit?

Answer key

  1. Friday
  2. 17000
  3. 5
  4. 8
  5. Wednesday
  6. 8
  7. 1
  8. 208
  9. 33
  10. 7
  11. 28
  12. 54
  13. 94
  14. 25
  15. 91
  16. 1089
  17. 19
  18. 4
  19. 45
  20. Tuesday
  21. 45
  22. 253
  23. Friday
  24. 11
  25. 32
  26. 54
  27. 81
  28. 8
  29. 2415
  30. 56
  31. 3081
  32. Wednesday
  33. 38
  34. 11111111
  35. 49
  36. 116
  37. 62
  38. 18
  39. 1089
  40. 0

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