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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 249 · 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. 1.9 × 9 =
  2. 2.48 × 4 =
  3. 3.Take 563. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  4. 4.If today is Tuesday, what day was it 8 days ago? (a) Sunday (b) Thursday (c) Monday (d) Tuesday
  5. 5.37 × 15 =
  6. 6.Think of 7. Multiply it by 4, then add 2. What number do you end with?
  7. 7.Odd one out: which number is NOT in the 6 times table? (a) 36 (b) 48 (c) 18 (d) 47
  8. 8.693 + 396 =
  9. 9.What comes next? 16, 18, 20, 22, ? (a) 24 (b) 25 (c) 22 (d) 26
  10. 10.A father is 32 years old and his son is 10. How old was the father when the son was born?
  11. 11.If today is Monday, what day will it be after 79 days? (a) Thursday (b) Saturday (c) Wednesday (d) Tuesday
  12. 12.16 × 4 =
  13. 13.12345678 × 8 + 8 =
  14. 14.A piggy bank has 9 coins of ₹5 and 9 coins of ₹2. How many rupees are in it?
  15. 15.What comes next? 25, 36, 49, 64, ? (a) 83 (b) 81 (c) 82 (d) 79
  16. 16.Double 67 =
  17. 17.Odd one out: which number is NOT in the 9 times table? (a) 36 (b) 27 (c) 54 (d) 82
  18. 18.Double 36 =
  19. 19.45 × 4 =
  20. 20.27 × 4 =
  21. 21.9 × 4 = 3? — what is the missing digit?
  22. 22.607 × 10 =
  23. 23.The 4th of a month is a Sunday. What day is the 23rd of the same month? (a) Friday (b) Monday (c) Thursday (d) Saturday
  24. 24.19 × 4 =
  25. 25.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  26. 26.What comes next? 4, 9, 16, 25, ? (a) 37 (b) 34 (c) 38 (d) 36
  27. 27.6 × 1000 =
  28. 28.54 × 100 =
  29. 29.9 × 2 = ?8 — what is the missing digit?
  30. 30.12345679 × 45 =
  31. 31.99 × 100 =
  32. 32.Take 85 and take away the sum of its digits. What do you get?
  33. 33.10 × 4 =
  34. 34.Magic square (every row, column and diagonal has the same total): 12 ? 8 | 10 14 18 | 20 6 16. What is the missing number?
  35. 35.Magic square (every row, column and diagonal has the same total): 5 4 9 | 10 6 2 | 3 ? 7. What is the missing number?
  36. 36.I thought of a number, added 7 and then doubled it. I got 30. What was my number?
  37. 37.13 × ? = 13000
  38. 38.9 × 7 = 6? — what is the missing digit?
  39. 39.9 × 5 = 4? — what is the missing digit?
  40. 40.9 × 7 = ?3 — what is the missing digit?

Answer key

  1. 81
  2. 192
  3. 198
  4. Monday
  5. 555
  6. 30
  7. 47
  8. 1089
  9. 24
  10. 22
  11. Wednesday
  12. 64
  13. 98765432
  14. 63
  15. 81
  16. 134
  17. 82
  18. 72
  19. 180
  20. 108
  21. 6
  22. 6070
  23. Friday
  24. 76
  25. 891
  26. 36
  27. 6000
  28. 5400
  29. 1
  30. 555555555
  31. 9900
  32. 72
  33. 40
  34. 22
  35. 8
  36. 8
  37. 1000
  38. 3
  39. 5
  40. 6

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