← Mixed trick challenge lesson New set →

Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 29 · 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.A girl is 8 years old and her brother is 3 years older. How old will her brother be in 2 years?
  2. 2.79 × 10 =
  3. 3.What comes next? 4, 7, 10, 13, ? (a) 16 (b) 13 (c) 17 (d) 19
  4. 4.Double 89 =
  5. 5.9 × 7 =
  6. 6.Half of 158 =
  7. 7.74?6 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  8. 8.9 × 7 = ?3 — what is the missing digit?
  9. 9.I thought of a number, added 1 and then doubled it. I got 10. What was my number?
  10. 10.9 × 3 = 2? — what is the missing digit?
  11. 11.What comes next? 5, 10, 20, 40, ? (a) 80 (b) 70 (c) 60 (d) 81
  12. 12.9 × 3 = ?7 — what is the missing digit?
  13. 13.Magic trick! Think of 2. Double it, add 16, halve it, then take away 2. What number do you get?
  14. 14.If today is Wednesday, what day will it be after 79 days? (a) Monday (b) Friday (c) Saturday (d) Thursday
  15. 15.The ages of two twins add up to 12. How old is each twin?
  16. 16.52 × 4 =
  17. 17.27 × 4 =
  18. 18.9 × 6 = ?4 — what is the missing digit?
  19. 19.9 × 4 = 3? — what is the missing digit?
  20. 20.9 × 10 = ?0 — what is the missing digit?
  21. 21.13 × 4 =
  22. 22.1 × 9 =
  23. 23.If today is Thursday, what day was it 57 days ago? (a) Wednesday (b) Tuesday (c) Saturday (d) Thursday
  24. 24.The ages of two twins add up to 18. How old is each twin?
  25. 25.37 × 27 =
  26. 26.Half of 14 =
  27. 27.Double 24 =
  28. 28.I thought of a number, added 9 and then doubled it. I got 54. What was my number?
  29. 29.1 + 2 + 3 + … + 81 =
  30. 30.9 × 10 = 9? — what is the missing digit?
  31. 31.9 × 9 = ?1 — what is the missing digit?
  32. 32.A piggy bank has 2 coins of ₹5 and 4 coins of ₹2. How many rupees are in it?
  33. 33.4 × 9 =
  34. 34.2?15 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  35. 35.The ages of two twins add up to 16. How old is each twin?
  36. 36.9 × 2 = ?8 — what is the missing digit?
  37. 37.123456 × 9 + 7 =
  38. 38.4 × ? = 4000
  39. 39.Take 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  40. 40.Take 13 and take away the sum of its digits. What do you get?

Answer key

  1. 13
  2. 790
  3. 16
  4. 178
  5. 63
  6. 79
  7. 1
  8. 6
  9. 4
  10. 7
  11. 80
  12. 2
  13. 8
  14. Friday
  15. 6
  16. 208
  17. 108
  18. 5
  19. 6
  20. 9
  21. 52
  22. 9
  23. Wednesday
  24. 9
  25. 999
  26. 7
  27. 48
  28. 18
  29. 3321
  30. 0
  31. 8
  32. 18
  33. 36
  34. 1
  35. 8
  36. 1
  37. 1111111
  38. 1000
  39. 693
  40. 9

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