← Mixed trick challenge lesson New set →

Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 304 · 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.Double 45 =
  2. 2.37 × 27 =
  3. 3.Do the 1089 trick with 385: reverse and subtract, then reverse that answer and add. What do you get?
  4. 4.17 × 4 =
  5. 5.A girl is 8 years old and her brother is 3 years older. How old will her brother be in 4 years?
  6. 6.66 × 100 =
  7. 7.37 × 6 =
  8. 8.2 × 9 =
  9. 9.36 × ? = 36000
  10. 10.1 + 2 + 3 + … + 88 =
  11. 11.5?56 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  12. 12.6 × 9 =
  13. 13.Take 37 and take away the sum of its digits. What do you get?
  14. 14.9 × 7 = 6? — what is the missing digit?
  15. 15.1 + 2 + 3 + … + 43 =
  16. 16.What comes next? 19, 22, 25, 28, ? (a) 34 (b) 28 (c) 32 (d) 31
  17. 17.Double 97 =
  18. 18.37 × 18 =
  19. 19.A girl is 12 years old and her brother is 2 years older. How old will her brother be in 4 years?
  20. 20.?811 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  21. 21.9 × 5 = ?5 — what is the missing digit?
  22. 22.30 × 4 =
  23. 23.In 6 years a boy will be 20 years old. How old was he 3 years ago?
  24. 24.I thought of a number, added 2 and then doubled it. I got 24. What was my number?
  25. 25.4 × 9 =
  26. 26.56 × 4 =
  27. 27.If today is Thursday, what day will it be after 59 days? (a) Saturday (b) Sunday (c) Monday (d) Wednesday
  28. 28.9 × 5 =
  29. 29.9 × 6 = ?4 — what is the missing digit?
  30. 30.9 × 4 = ?6 — what is the missing digit?
  31. 31.Magic trick! Think of 20. Double it, add 10, halve it, then take away 20. What number do you get?
  32. 32.942 × 10 =
  33. 33.What comes next? 36, 49, 64, 81, ? (a) 100 (b) 101 (c) 102 (d) 98
  34. 34.Double 38 =
  35. 35.9 × 3 = ?7 — what is the missing digit?
  36. 36.5 × 9 =
  37. 37.Half of 22 =
  38. 38.1 + 3 + 5 + … + 19 =
  39. 39.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  40. 40.4?75 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?

Answer key

  1. 90
  2. 999
  3. 1089
  4. 68
  5. 15
  6. 6600
  7. 222
  8. 18
  9. 1000
  10. 3916
  11. 2
  12. 54
  13. 27
  14. 3
  15. 946
  16. 31
  17. 194
  18. 666
  19. 18
  20. 8
  21. 4
  22. 120
  23. 11
  24. 10
  25. 36
  26. 224
  27. Sunday
  28. 45
  29. 5
  30. 3
  31. 5
  32. 9420
  33. 100
  34. 76
  35. 2
  36. 45
  37. 11
  38. 100
  39. 891
  40. 2

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