← Mixed trick challenge lesson New set →

Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 661 · 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. 1.6 × 9 =
  2. 2.The ages of two twins add up to 20. How old is each twin?
  3. 3.6 × 4 =
  4. 4.1 + 2 + 3 + … + 16 =
  5. 5.In 5 years a boy will be 18 years old. How old was he 2 years ago?
  6. 6.9 × 4 =
  7. 7.Magic square (every row, column and diagonal has the same total): ? 3 13 | 7 11 15 | 9 19 5. What is the missing number?
  8. 8.If today is Saturday, what day was it 54 days ago? (a) Tuesday (b) Sunday (c) Thursday (d) Monday
  9. 9.2?07 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  10. 10.The ages of two twins add up to 18. How old is each twin?
  11. 11.Double 57 =
  12. 12.I thought of a number, multiplied it by 3 and added 5. I got 14. What was my number?
  13. 13.Take 35 and take away the sum of its digits. What do you get?
  14. 14.9 × 8 = ?2 — what is the missing digit?
  15. 15.983 × 10 =
  16. 16.12345679 × 63 =
  17. 17.I thought of a number, multiplied it by 3 and added 7. I got 31. What was my number?
  18. 18.48 × 4 =
  19. 19.Double 32 =
  20. 20.55 × 4 =
  21. 21.In 3 years a boy will be 13 years old. How old was he 2 years ago?
  22. 22.43 × 1000 =
  23. 23.37 × 1000 =
  24. 24.238 × ? = 2380
  25. 25.1 + 3 + 5 + … + 37 =
  26. 26.Think of 5. Multiply it by 4, then add 5. What number do you end with?
  27. 27.11 × 4 =
  28. 28.9 × 10 = ?0 — what is the missing digit?
  29. 29.37 × 3 =
  30. 30.The ages of two twins add up to 22. How old is each twin?
  31. 31.47 × 4 =
  32. 32.1 + 3 + 5 + … + 21 =
  33. 33.1 × 9 =
  34. 34.Take 600. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  35. 35.I thought of a number, multiplied it by 2 and added 1. I got 15. What was my number?
  36. 36.Half of 106 =
  37. 37.241 × 10 =
  38. 38.Half of 124 =
  39. 39.Take 45 and take away the sum of its digits. What do you get?
  40. 40.If today is Wednesday, what day will it be after 45 days? (a) Friday (b) Saturday (c) Sunday (d) Tuesday

Answer key

  1. 54
  2. 10
  3. 24
  4. 136
  5. 11
  6. 36
  7. 17
  8. Monday
  9. 9
  10. 9
  11. 114
  12. 3
  13. 27
  14. 7
  15. 9830
  16. 777777777
  17. 8
  18. 192
  19. 64
  20. 220
  21. 8
  22. 43000
  23. 37000
  24. 10
  25. 361
  26. 25
  27. 44
  28. 9
  29. 111
  30. 11
  31. 188
  32. 121
  33. 9
  34. 594
  35. 7
  36. 53
  37. 2410
  38. 62
  39. 36
  40. Saturday

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