← Mixed trick challenge lesson New set →

Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 725 · 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. 1.9 × 7 = ?3 — what is the missing digit?
  2. 2.9 × 9 = 8? — what is the missing digit?
  3. 3.9 × 10 =
  4. 4.111111 × 111111 =
  5. 5.1234 × 9 + 5 =
  6. 6.44 × 100 =
  7. 7.297 + 792 =
  8. 8.45 × 100 =
  9. 9.60 × 4 =
  10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
  11. 11.198 + 891 =
  12. 12.34 × 1000 =
  13. 13.Double 87 =
  14. 14.19 × 4 =
  15. 15.123 × 8 + 3 =
  16. 16.If today is Saturday, what day will it be after 74 days? (a) Saturday (b) Tuesday (c) Wednesday (d) Thursday
  17. 17.9 × 4 =
  18. 18.1 + 3 + 5 + … + 21 =
  19. 19.Half of 152 =
  20. 20.1 + 3 + 5 + … + 17 =
  21. 21.28 × 4 =
  22. 22.I thought of a number, added 9 and then doubled it. I got 54. What was my number?
  23. 23.1 + 2 + 3 + … + 56 =
  24. 24.?713 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  25. 25.9 × 6 = 5? — what is the missing digit?
  26. 26.41 × 4 =
  27. 27.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
  28. 28.Half of 108 =
  29. 29.44 × 4 =
  30. 30.Double 55 =
  31. 31.Double 35 =
  32. 32.6 × 9 =
  33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
  34. 34.Magic square (every row, column and diagonal has the same total): 14 15 10 | 9 13 17 | 16 11 ?. What is the missing number?
  35. 35.Half of 146 =
  36. 36.The 7th of a month is a Tuesday. What day is the 24th of the same month? (a) Monday (b) Thursday (c) Friday (d) Saturday
  37. 37.Think of 4. Multiply it by 3, then add 5. What number do you end with?
  38. 38.32 × 4 =
  39. 39.49 × 4 =
  40. 40.123456 × 9 + 7 =

Answer key

  1. 6
  2. 1
  3. 90
  4. 12345654321
  5. 11111
  6. 4400
  7. 1089
  8. 4500
  9. 240
  10. 693
  11. 1089
  12. 34000
  13. 174
  14. 76
  15. 987
  16. Wednesday
  17. 36
  18. 121
  19. 76
  20. 81
  21. 112
  22. 18
  23. 1596
  24. 7
  25. 4
  26. 164
  27. 594
  28. 54
  29. 176
  30. 110
  31. 70
  32. 54
  33. 198
  34. 12
  35. 73
  36. Friday
  37. 17
  38. 128
  39. 196
  40. 1111111

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