← Mixed trick challenge lesson New set →

Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 118 · 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. 1.37 × 21 =
  2. 2.I thought of a number, multiplied it by 4 and added 6. I got 22. What was my number?
  3. 3.A girl is 5 years old and her brother is 5 years older. How old will her brother be in 7 years?
  4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
  5. 5.495 + 594 =
  6. 6.9 × ? = 9000
  7. 7.I thought of a number, multiplied it by 2 and added 4. I got 16. What was my number?
  8. 8.A piggy bank has 7 coins of ₹5 and 4 coins of ₹2. How many rupees are in it?
  9. 9.The 9th of a month is a Monday. What day is the 24th of the same month? (a) Monday (b) Friday (c) Wednesday (d) Tuesday
  10. 10.9 × 9 = ?1 — what is the missing digit?
  11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
  12. 12.1 + 3 + 5 + … + 21 =
  13. 13.551 × ? = 5510
  14. 14.Magic square (every row, column and diagonal has the same total): 15 5 ? | 17 13 9 | 7 21 11. What is the missing number?
  15. 15.12345 × 8 + 5 =
  16. 16.57 × 4 =
  17. 17.50 × 1000 =
  18. 18.211 × ? = 2110
  19. 19.Magic square (every row, column and diagonal has the same total): 10 8 ? | 20 12 4 | 6 16 14. What is the missing number?
  20. 20.A girl is 7 years old and her brother is 2 years older. How old will her brother be in 6 years?
  21. 21.9 × 5 = ?5 — what is the missing digit?
  22. 22.Do the 1089 trick with 846: reverse and subtract, then reverse that answer and add. What do you get?
  23. 23.Magic square (every row, column and diagonal has the same total): ? 13 28 | 31 19 7 | 10 25 22. What is the missing number?
  24. 24.The ages of two twins add up to 24. How old is each twin?
  25. 25.Think of 7. Multiply it by 3, then add 6. What number do you end with?
  26. 26.330 × 10 =
  27. 27.198 + 891 =
  28. 28.9 × 5 =
  29. 29.The 5th of a month is a Saturday. What day is the 18th of the same month? (a) Thursday (b) Saturday (c) Friday (d) Monday
  30. 30.I thought of a number, added 2 and then doubled it. I got 20. What was my number?
  31. 31.4 × 9 =
  32. 32.Take 87 and take away the sum of its digits. What do you get?
  33. 33.Double 41 =
  34. 34.50 × ? = 5000
  35. 35.37 × 15 =
  36. 36.1 + 2 + 3 + … + 40 =
  37. 37.297 + 792 =
  38. 38.9 × 5 = 4? — what is the missing digit?
  39. 39.1 + 2 + 3 + … + 75 =
  40. 40.5 × 9 =

Answer key

  1. 777
  2. 4
  3. 17
  4. 891
  5. 1089
  6. 1000
  7. 6
  8. 43
  9. Tuesday
  10. 8
  11. 198
  12. 121
  13. 10
  14. 19
  15. 98765
  16. 228
  17. 50000
  18. 10
  19. 18
  20. 15
  21. 4
  22. 1089
  23. 16
  24. 12
  25. 27
  26. 3300
  27. 1089
  28. 45
  29. Friday
  30. 8
  31. 36
  32. 72
  33. 82
  34. 100
  35. 555
  36. 820
  37. 1089
  38. 5
  39. 2850
  40. 45

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