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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 996 · 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. 1.5 × 9 =
  2. 2.Take 660. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  3. 3.Magic square (every row, column and diagonal has the same total): 3 ? 5 | 8 6 4 | 7 2 9. What is the missing number?
  4. 4.1 + 2 + 3 + … + 19 =
  5. 5.13 × 4 =
  6. 6.12345679 × 27 =
  7. 7.55 × 4 =
  8. 8.9 × 9 =
  9. 9.Half of 44 =
  10. 10.Double 39 =
  11. 11.If today is Thursday, what day was it 17 days ago? (a) Tuesday (b) Monday (c) Thursday (d) Sunday
  12. 12.Odd one out: which number is NOT in the 9 times table? (a) 45 (b) 27 (c) 83 (d) 36
  13. 13.?809 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  14. 14.610? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  15. 15.Magic square (every row, column and diagonal has the same total): ? 8 3 | 2 6 10 | 9 4 5. What is the missing number?
  16. 16.1 + 3 + 5 + … + 49 =
  17. 17.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  18. 18.Magic square (every row, column and diagonal has the same total): 8 13 12 | 15 11 ? | 10 9 14. What is the missing number?
  19. 19.9 × 8 = 7? — what is the missing digit?
  20. 20.If today is Thursday, what day was it 52 days ago? (a) Thursday (b) Monday (c) Tuesday (d) Sunday
  21. 21.38 × 4 =
  22. 22.What comes next? 2, 4, 8, 16, ? (a) 24 (b) 33 (c) 32 (d) 28
  23. 23.484 × ? = 4840
  24. 24.You have 12 coins. Each coin is ₹1 or ₹2, and together they make ₹18. How many ₹2 coins do you have?
  25. 25.Double 74 =
  26. 26.Magic square (every row, column and diagonal has the same total): ? 17 7 | 5 13 21 | 19 9 11. What is the missing number?
  27. 27.A piggy bank has 5 coins of ₹5 and 13 coins of ₹2. How many rupees are in it?
  28. 28.I thought of a number, multiplied it by 4 and added 9. I got 49. What was my number?
  29. 29.21 × 4 =
  30. 30.The 3rd of a month is a Wednesday. What day is the 13th of the same month? (a) Sunday (b) Friday (c) Tuesday (d) Saturday
  31. 31.9 × 6 = ?4 — what is the missing digit?
  32. 32.65 × ? = 6500
  33. 33.Half of 136 =
  34. 34.9 × 4 = 3? — what is the missing digit?
  35. 35.Take 23 and take away the sum of its digits. What do you get?
  36. 36.Take 560. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  37. 37.12345679 × 72 =
  38. 38.I thought of a number, multiplied it by 5 and added 3. I got 13. What was my number?
  39. 39.297 + 792 =
  40. 40.1 + 3 + 5 + … + 11 =

Answer key

  1. 45
  2. 594
  3. 10
  4. 190
  5. 52
  6. 333333333
  7. 220
  8. 81
  9. 22
  10. 78
  11. Monday
  12. 83
  13. 1
  14. 2
  15. 7
  16. 625
  17. 792
  18. 7
  19. 2
  20. Monday
  21. 152
  22. 32
  23. 10
  24. 6
  25. 148
  26. 15
  27. 51
  28. 10
  29. 84
  30. Saturday
  31. 5
  32. 100
  33. 68
  34. 6
  35. 18
  36. 495
  37. 888888888
  38. 2
  39. 1089
  40. 36

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