← Mixed trick challenge lesson New set →

Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 780 · 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. 1.12345679 × 18 =
  2. 2.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  3. 3.4 × ? = 4000
  4. 4.9 × 8 = 7? — what is the missing digit?
  5. 5.3 × 100 =
  6. 6.Magic trick! Think of 14. Double it, add 6, halve it, then take away 14. What number do you get?
  7. 7.Take 66 and take away the sum of its digits. What do you get?
  8. 8.What comes next? 9, 16, 25, 36, ? (a) 51 (b) 49 (c) 50 (d) 47
  9. 9.Take 27 and take away the sum of its digits. What do you get?
  10. 10.9 × 3 =
  11. 11.If today is Sunday, what day was it 27 days ago? (a) Tuesday (b) Thursday (c) Sunday (d) Monday
  12. 12.1 + 2 + 3 + … + 21 =
  13. 13.12345679 × 72 =
  14. 14.9 × 9 = 8? — what is the missing digit?
  15. 15.Take 41 and take away the sum of its digits. What do you get?
  16. 16.13 × 1000 =
  17. 17.Magic square (every row, column and diagonal has the same total): 14 9 16 | 15 13 11 | ? 17 12. What is the missing number?
  18. 18.Double 14 =
  19. 19.11111 × 11111 =
  20. 20.47 × 4 =
  21. 21.Magic square (every row, column and diagonal has the same total): 19 16 31 | 34 22 10 | 13 28 ?. What is the missing number?
  22. 22.9 × 8 = ?2 — what is the missing digit?
  23. 23.9 × 7 = ?3 — what is the missing digit?
  24. 24.If today is Sunday, what day will it be after 84 days? (a) Monday (b) Wednesday (c) Saturday (d) Sunday
  25. 25.Take 916. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  26. 26.33 × 4 =
  27. 27.If today is Sunday, what day will it be after 39 days? (a) Wednesday (b) Thursday (c) Sunday (d) Friday
  28. 28.37 × 4 =
  29. 29.A piggy bank has 2 coins of ₹5 and 2 coins of ₹2. How many rupees are in it?
  30. 30.39 × ? = 39000
  31. 31.56 × 4 =
  32. 32.Magic square (every row, column and diagonal has the same total): ? 11 26 | 17 23 29 | 20 35 14. What is the missing number?
  33. 33.9 × 4 =
  34. 34.241 × ? = 2410
  35. 35.What comes next? 5, 10, 20, 40, ? (a) 70 (b) 60 (c) 81 (d) 80
  36. 36.9 × 7 = 6? — what is the missing digit?
  37. 37.What comes next? 1, 2, 4, 8, ? (a) 14 (b) 12 (c) 16 (d) 17
  38. 38.9 × 5 =
  39. 39.A piggy bank has 12 coins of ₹5 and 15 coins of ₹2. How many rupees are in it?
  40. 40.Do the 1089 trick with 965: reverse and subtract, then reverse that answer and add. What do you get?

Answer key

  1. 222222222
  2. 792
  3. 1000
  4. 2
  5. 300
  6. 3
  7. 54
  8. 49
  9. 18
  10. 27
  11. Monday
  12. 231
  13. 888888888
  14. 1
  15. 36
  16. 13000
  17. 10
  18. 28
  19. 123454321
  20. 188
  21. 25
  22. 7
  23. 6
  24. Sunday
  25. 297
  26. 132
  27. Thursday
  28. 148
  29. 14
  30. 1000
  31. 224
  32. 32
  33. 36
  34. 10
  35. 80
  36. 3
  37. 16
  38. 45
  39. 90
  40. 1089

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