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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 334 · 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. 1.474 × ? = 4740
  2. 2.Take 740. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  3. 3.37 × 27 =
  4. 4.Magic square (every row, column and diagonal has the same total): 3 ? 5 | 8 6 4 | 7 2 9. What is the missing number?
  5. 5.Think of 3. Multiply it by 4, then add 4. What number do you end with?
  6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
  7. 7.9 × 9 = 8? — what is the missing digit?
  8. 8.I thought of a number, added 4 and then doubled it. I got 18. What was my number?
  9. 9.A piggy bank has 12 coins of ₹5 and 4 coins of ₹2. How many rupees are in it?
  10. 10.10 × 9 =
  11. 11.What comes next? 5, 14, 23, 32, ? (a) 50 (b) 32 (c) 42 (d) 41
  12. 12.If today is Saturday, what day will it be after 48 days? (a) Thursday (b) Saturday (c) Monday (d) Friday
  13. 13.89 × 100 =
  14. 14.Think of 5. Multiply it by 5, then add 1. What number do you end with?
  15. 15.Double 89 =
  16. 16.1 + 2 + 3 + … + 93 =
  17. 17.693 + 396 =
  18. 18.What comes next? 11, 17, 23, 29, ? (a) 36 (b) 35 (c) 29 (d) 41
  19. 19.What comes next? 3, 6, 12, 24, ? (a) 36 (b) 48 (c) 42 (d) 49
  20. 20.37 × 9 =
  21. 21.What comes next? 15, 19, 23, 27, ? (a) 35 (b) 27 (c) 32 (d) 31
  22. 22.Magic square (every row, column and diagonal has the same total): 10 11 6 | 5 ? 13 | 12 7 8. What is the missing number?
  23. 23.9 × 5 =
  24. 24.Double 29 =
  25. 25.Magic square (every row, column and diagonal has the same total): 6 5 10 | 11 7 3 | ? 9 8. What is the missing number?
  26. 26.9 × 6 = ?4 — what is the missing digit?
  27. 27.I thought of a number, multiplied it by 2 and added 8. I got 26. What was my number?
  28. 28.Think of 6. Multiply it by 4, then add 9. What number do you end with?
  29. 29.If today is Monday, what day was it 30 days ago? (a) Friday (b) Tuesday (c) Saturday (d) Sunday
  30. 30.42 × 4 =
  31. 31.26 × 4 =
  32. 32.Magic trick! Think of 17. Double it, add 14, halve it, then take away 17. What number do you get?
  33. 33.9 × 5 = ?5 — what is the missing digit?
  34. 34.1 + 2 + 3 + … + 49 =
  35. 35.Take 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  36. 36.7 × 9 =
  37. 37.The 4th of a month is a Tuesday. What day is the 16th of the same month? (a) Saturday (b) Sunday (c) Wednesday (d) Monday
  38. 38.The 2nd of a month is a Friday. What day is the 22nd of the same month? (a) Friday (b) Wednesday (c) Sunday (d) Thursday
  39. 39.39 × 1000 =
  40. 40.37 × 1000 =

Answer key

  1. 10
  2. 693
  3. 999
  4. 10
  5. 16
  6. 198
  7. 1
  8. 5
  9. 68
  10. 90
  11. 41
  12. Friday
  13. 8900
  14. 26
  15. 178
  16. 4371
  17. 1089
  18. 35
  19. 48
  20. 333
  21. 31
  22. 9
  23. 45
  24. 58
  25. 4
  26. 5
  27. 9
  28. 33
  29. Saturday
  30. 168
  31. 104
  32. 7
  33. 4
  34. 1225
  35. 693
  36. 63
  37. Sunday
  38. Thursday
  39. 39000
  40. 37000

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