← Mixed trick challenge lesson New set →

Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 575 · 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. 1.1 + 2 + 3 + … + 77 =
  2. 2.What comes next? 10, 17, 24, 31, ? (a) 31 (b) 45 (c) 38 (d) 39
  3. 3.Magic square (every row, column and diagonal has the same total): 16 31 10 | 13 19 ? | 28 7 22. What is the missing number?
  4. 4.2 × 9 =
  5. 5.11 × 11 =
  6. 6.Half of 74 =
  7. 7.Magic square (every row, column and diagonal has the same total): 17 15 ? | 27 19 11 | 13 23 21. What is the missing number?
  8. 8.50 × 4 =
  9. 9.A girl is 6 years old and her brother is 2 years older. How old will her brother be in 5 years?
  10. 10.A father is 38 years old and his son is 11. How old was the father when the son was born?
  11. 11.22 × 100 =
  12. 12.495 + 594 =
  13. 13.198 + 891 =
  14. 14.47 × 4 =
  15. 15.Take 169. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  16. 16.Take 32 and take away the sum of its digits. What do you get?
  17. 17.12345679 × 81 =
  18. 18.9 × 2 = 1? — what is the missing digit?
  19. 19.I thought of a number, multiplied it by 4 and added 2. I got 22. What was my number?
  20. 20.1234567 × 9 + 8 =
  21. 21.51 × 4 =
  22. 22.15 × 4 =
  23. 23.396 + 693 =
  24. 24.I thought of a number, added 5 and then doubled it. I got 32. What was my number?
  25. 25.Magic square (every row, column and diagonal has the same total): 13 10 ? | 28 16 4 | 7 22 19. What is the missing number?
  26. 26.1 + 3 + 5 + … + 17 =
  27. 27.?745 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  28. 28.7 × 9 =
  29. 29.What comes next? 36, 49, 64, 81, ? (a) 100 (b) 98 (c) 101 (d) 102
  30. 30.1 × 9 =
  31. 31.Magic square (every row, column and diagonal has the same total): 13 27 17 | 23 19 15 | 21 ? 25. What is the missing number?
  32. 32.The ages of two twins add up to 10. How old is each twin?
  33. 33.9 × 8 =
  34. 34.38 × 100 =
  35. 35.37 × 6 =
  36. 36.I thought of a number, multiplied it by 2 and added 9. I got 23. What was my number?
  37. 37.1 + 2 + 3 + … + 27 =
  38. 38.What comes next? 1, 4, 9, 16, ? (a) 25 (b) 27 (c) 26 (d) 23
  39. 39.1 + 2 + 3 + … + 64 =
  40. 40.Do the 1089 trick with 790: reverse and subtract, then reverse that answer and add. What do you get?

Answer key

  1. 3003
  2. 38
  3. 25
  4. 18
  5. 121
  6. 37
  7. 25
  8. 200
  9. 13
  10. 27
  11. 2200
  12. 1089
  13. 1089
  14. 188
  15. 792
  16. 27
  17. 999999999
  18. 8
  19. 5
  20. 11111111
  21. 204
  22. 60
  23. 1089
  24. 11
  25. 25
  26. 81
  27. 2
  28. 63
  29. 100
  30. 9
  31. 11
  32. 5
  33. 72
  34. 3800
  35. 222
  36. 7
  37. 378
  38. 25
  39. 2080
  40. 1089

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