← Mixed trick challenge lesson New set →

Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 231 · 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. 1.850 × 10 =
  2. 2.38 × 4 =
  3. 3.11111 × 11111 =
  4. 4.What comes next? 16, 25, 36, 49, ? (a) 65 (b) 62 (c) 64 (d) 66
  5. 5.49 × 1000 =
  6. 6.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  7. 7.693 + 396 =
  8. 8.8 × 9 =
  9. 9.453 × 10 =
  10. 10.51 × 4 =
  11. 11.A girl is 8 years old and her brother is 2 years older. How old will her brother be in 3 years?
  12. 12.What comes next? 9, 16, 25, 36, ? (a) 47 (b) 49 (c) 50 (d) 51
  13. 13.Take 519. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  14. 14.33 × 4 =
  15. 15.891 + 198 =
  16. 16.1 + 2 + 3 + … + 38 =
  17. 17.If today is Saturday, what day will it be after 23 days? (a) Sunday (b) Monday (c) Tuesday (d) Thursday
  18. 18.12345679 × 45 =
  19. 19.12345679 × 81 =
  20. 20.?244 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  21. 21.123456 × 9 + 7 =
  22. 22.60 × 100 =
  23. 23.Magic square (every row, column and diagonal has the same total): 9 10 5 | 4 8 ? | 11 6 7. What is the missing number?
  24. 24.Take 32 and take away the sum of its digits. What do you get?
  25. 25.1 + 2 + 3 + … + 68 =
  26. 26.50 × 100 =
  27. 27.9 × 5 = 4? — what is the missing digit?
  28. 28.Odd one out: which number is NOT in the 8 times table? (a) 56 (b) 40 (c) 32 (d) 75
  29. 29.Double 49 =
  30. 30.684 × 10 =
  31. 31.9 × 9 =
  32. 32.57 × 4 =
  33. 33.1?86 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  34. 34.1 + 2 + 3 + … + 31 =
  35. 35.9 × 2 = 1? — what is the missing digit?
  36. 36.1 + 3 + 5 + … + 37 =
  37. 37.Double 62 =
  38. 38.1 + 3 + 5 + … + 25 =
  39. 39.46 × 4 =
  40. 40.123 × 8 + 3 =

Answer key

  1. 8500
  2. 152
  3. 123454321
  4. 64
  5. 49000
  6. 891
  7. 1089
  8. 72
  9. 4530
  10. 204
  11. 13
  12. 49
  13. 396
  14. 132
  15. 1089
  16. 741
  17. Monday
  18. 555555555
  19. 999999999
  20. 8
  21. 1111111
  22. 6000
  23. 12
  24. 27
  25. 2346
  26. 5000
  27. 5
  28. 75
  29. 98
  30. 6840
  31. 81
  32. 228
  33. 3
  34. 496
  35. 8
  36. 361
  37. 124
  38. 169
  39. 184
  40. 987

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