← Mixed trick challenge lesson New set →

Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 426 · 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.Double 13 =
  2. 2.A girl is 7 years old and her brother is 6 years older. How old will her brother be in 4 years?
  3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
  4. 4.1 + 2 + 3 + … + 55 =
  5. 5.12345679 × 72 =
  6. 6.1?84 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  7. 7.9 × 3 = ?7 — what is the missing digit?
  8. 8.Magic square (every row, column and diagonal has the same total): 25 10 ? | 4 16 28 | 19 22 7. What is the missing number?
  9. 9.9 × 2 = 1? — what is the missing digit?
  10. 10.What comes next? 25, 36, 49, 64, ? (a) 79 (b) 83 (c) 81 (d) 82
  11. 11.7 × 100 =
  12. 12.891 + 198 =
  13. 13.Think of 15. Multiply it by 4, then add 8. What number do you end with?
  14. 14.A piggy bank has 11 coins of ₹5 and 8 coins of ₹2. How many rupees are in it?
  15. 15.693 + 396 =
  16. 16.16 × 4 =
  17. 17.Take 55 and take away the sum of its digits. What do you get?
  18. 18.Magic trick! Think of 10. Double it, add 16, halve it, then take away 10. What number do you get?
  19. 19.Magic square (every row, column and diagonal has the same total): 24 14 16 | 10 18 26 | 20 22 ?. What is the missing number?
  20. 20.If today is Friday, what day was it 36 days ago? (a) Friday (b) Thursday (c) Wednesday (d) Sunday
  21. 21.672 × 10 =
  22. 22.What comes next? 9, 16, 25, 36, ? (a) 50 (b) 51 (c) 47 (d) 49
  23. 23.Take 294. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  24. 24.9 × 7 = 6? — what is the missing digit?
  25. 25.32?8 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  26. 26.In 2 years a boy will be 16 years old. How old was he 2 years ago?
  27. 27.What comes next? 5, 10, 20, 40, ? (a) 81 (b) 60 (c) 80 (d) 70
  28. 28.9 × 2 =
  29. 29.365 × ? = 3650
  30. 30.If today is Wednesday, what day was it 15 days ago? (a) Friday (b) Monday (c) Tuesday (d) Wednesday
  31. 31.9 × 4 = ?6 — what is the missing digit?
  32. 32.Magic square (every row, column and diagonal has the same total): 11 4 9 | ? 8 10 | 7 12 5. What is the missing number?
  33. 33.1 + 3 + 5 + … + 43 =
  34. 34.A girl is 10 years old and her brother is 2 years older. How old will her brother be in 9 years?
  35. 35.Half of 28 =
  36. 36.A piggy bank has 10 coins of ₹5 and 13 coins of ₹2. How many rupees are in it?
  37. 37.The 5th of a month is a Monday. What day is the 23rd of the same month? (a) Friday (b) Thursday (c) Monday (d) Saturday
  38. 38.Odd one out: which number is NOT in the 6 times table? (a) 12 (b) 24 (c) 36 (d) 19
  39. 39.9 × 1 =
  40. 40.1234567 × 9 + 8 =

Answer key

  1. 26
  2. 17
  3. 891
  4. 1540
  5. 888888888
  6. 5
  7. 2
  8. 13
  9. 8
  10. 81
  11. 700
  12. 1089
  13. 68
  14. 71
  15. 1089
  16. 64
  17. 45
  18. 8
  19. 12
  20. Thursday
  21. 6720
  22. 49
  23. 198
  24. 3
  25. 5
  26. 12
  27. 80
  28. 18
  29. 10
  30. Tuesday
  31. 3
  32. 6
  33. 484
  34. 21
  35. 14
  36. 76
  37. Friday
  38. 19
  39. 9
  40. 11111111

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