← Mixed trick challenge lesson New set →

Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 785 · 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.A father is 44 years old and his son is 13. How old was the father when the son was born?
  2. 2.Take 355. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  3. 3.9 × 7 = 6? — what is the missing digit?
  4. 4.594 + 495 =
  5. 5.The 9th of a month is a Monday. What day is the 27th of the same month? (a) Thursday (b) Monday (c) Friday (d) Saturday
  6. 6.Magic square (every row, column and diagonal has the same total): 4 14 12 | 18 ? 2 | 8 6 16. What is the missing number?
  7. 7.Magic square (every row, column and diagonal has the same total): 13 15 5 | 3 11 19 | 17 ? 9. What is the missing number?
  8. 8.1111 × 1111 =
  9. 9.Magic square (every row, column and diagonal has the same total): 12 17 10 | 11 13 ? | 16 9 14. What is the missing number?
  10. 10.9 × 6 = ?4 — what is the missing digit?
  11. 11.12345679 × 72 =
  12. 12.In 3 years a boy will be 12 years old. How old was he 3 years ago?
  13. 13.9 × 8 = 7? — what is the missing digit?
  14. 14.393 × ? = 3930
  15. 15.693 + 396 =
  16. 16.If today is Thursday, what day was it 58 days ago? (a) Monday (b) Friday (c) Tuesday (d) Wednesday
  17. 17.50 × ? = 50000
  18. 18.495 + 594 =
  19. 19.4 × 9 =
  20. 20.3 × 9 =
  21. 21.What comes next? 15, 20, 25, 30, ? (a) 36 (b) 35 (c) 40 (d) 30
  22. 22.I thought of a number, added 3 and then doubled it. I got 32. What was my number?
  23. 23.1 + 2 + 3 + … + 28 =
  24. 24.9 × 9 = 8? — what is the missing digit?
  25. 25.What comes next? 2, 4, 8, 16, ? (a) 32 (b) 24 (c) 33 (d) 28
  26. 26.The 1st of a month is a Saturday. What day is the 14th of the same month? (a) Friday (b) Saturday (c) Monday (d) Thursday
  27. 27.A piggy bank has 11 coins of ₹5 and 13 coins of ₹2. How many rupees are in it?
  28. 28.31 × 1000 =
  29. 29.9 × 3 = ?7 — what is the missing digit?
  30. 30.36 × 100 =
  31. 31.I thought of a number, multiplied it by 2 and added 4. I got 16. What was my number?
  32. 32.10 × ? = 10000
  33. 33.9 × 6 = 5? — what is the missing digit?
  34. 34.123456 × 9 + 7 =
  35. 35.Magic trick! Think of 7. Double it, add 18, halve it, then take away 7. What number do you get?
  36. 36.9 × 1 =
  37. 37.Do the 1089 trick with 734: reverse and subtract, then reverse that answer and add. What do you get?
  38. 38.Magic square (every row, column and diagonal has the same total): 5 12 ? | 10 8 6 | 9 4 11. What is the missing number?
  39. 39.7 × 9 =
  40. 40.9 × 8 =

Answer key

  1. 31
  2. 198
  3. 3
  4. 1089
  5. Friday
  6. 10
  7. 7
  8. 1234321
  9. 15
  10. 5
  11. 888888888
  12. 6
  13. 2
  14. 10
  15. 1089
  16. Tuesday
  17. 1000
  18. 1089
  19. 36
  20. 27
  21. 35
  22. 13
  23. 406
  24. 1
  25. 32
  26. Friday
  27. 81
  28. 31000
  29. 2
  30. 3600
  31. 6
  32. 1000
  33. 4
  34. 1111111
  35. 9
  36. 9
  37. 1089
  38. 7
  39. 63
  40. 72

Free maths tricks lessons, practice and worksheets at talentjr.in/maths-tricks