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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 881 · 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.Magic square (every row, column and diagonal has the same total): 4 14 12 | 18 10 ? | 8 6 16. What is the missing number?
  2. 2.What comes next? 36, 49, 64, 81, ? (a) 101 (b) 98 (c) 102 (d) 100
  3. 3.Do the 1089 trick with 480: reverse and subtract, then reverse that answer and add. What do you get?
  4. 4.9 × 2 = ?8 — what is the missing digit?
  5. 5.11 × 11 =
  6. 6.Take 14 and take away the sum of its digits. What do you get?
  7. 7.9 × 5 = ?5 — what is the missing digit?
  8. 8.What comes next? 1, 2, 4, 8, ? (a) 17 (b) 12 (c) 14 (d) 16
  9. 9.Magic square (every row, column and diagonal has the same total): 12 9 24 | 27 15 ? | 6 21 18. What is the missing number?
  10. 10.The 2nd of a month is a Wednesday. What day is the 27th of the same month? (a) Monday (b) Sunday (c) Wednesday (d) Saturday
  11. 11.1 + 3 + 5 + … + 45 =
  12. 12.47 × 4 =
  13. 13.You have 7 coins. Each coin is ₹1 or ₹2, and together they make ₹9. How many ₹2 coins do you have?
  14. 14.9 × 4 =
  15. 15.1 + 2 + 3 + … + 39 =
  16. 16.12 × 4 =
  17. 17.37 × 15 =
  18. 18.42 × 4 =
  19. 19.If today is Friday, what day will it be after 97 days? (a) Sunday (b) Friday (c) Wednesday (d) Thursday
  20. 20.A girl is 12 years old and her brother is 4 years older. How old will her brother be in 9 years?
  21. 21.Magic square (every row, column and diagonal has the same total): 10 31 16 | 25 ? 13 | 22 7 28. What is the missing number?
  22. 22.396 + 693 =
  23. 23.1 + 3 + 5 + … + 9 =
  24. 24.9 × 7 = 6? — what is the missing digit?
  25. 25.The ages of two twins add up to 22. How old is each twin?
  26. 26.You have 10 coins. Each coin is ₹1 or ₹2, and together they make ₹11. How many ₹2 coins do you have?
  27. 27.What comes next? 2, 4, 8, 16, ? (a) 32 (b) 24 (c) 28 (d) 33
  28. 28.55 × 4 =
  29. 29.11 × 4 =
  30. 30.57 × ? = 570
  31. 31.The 3rd of a month is a Tuesday. What day is the 11th of the same month? (a) Thursday (b) Tuesday (c) Saturday (d) Wednesday
  32. 32.If today is Wednesday, what day will it be after 91 days? (a) Saturday (b) Tuesday (c) Wednesday (d) Thursday
  33. 33.Do the 1089 trick with 912: reverse and subtract, then reverse that answer and add. What do you get?
  34. 34.I thought of a number, added 2 and then doubled it. I got 26. What was my number?
  35. 35.Take 99 and take away the sum of its digits. What do you get?
  36. 36.9 × 3 =
  37. 37.Double 83 =
  38. 38.10 × 9 =
  39. 39.The 1st of a month is a Thursday. What day is the 13th of the same month? (a) Tuesday (b) Friday (c) Wednesday (d) Monday
  40. 40.Double 97 =

Answer key

  1. 2
  2. 100
  3. 1089
  4. 1
  5. 121
  6. 9
  7. 4
  8. 16
  9. 3
  10. Sunday
  11. 529
  12. 188
  13. 2
  14. 36
  15. 780
  16. 48
  17. 555
  18. 168
  19. Thursday
  20. 25
  21. 19
  22. 1089
  23. 25
  24. 3
  25. 11
  26. 1
  27. 32
  28. 220
  29. 44
  30. 10
  31. Wednesday
  32. Wednesday
  33. 1089
  34. 11
  35. 81
  36. 27
  37. 166
  38. 90
  39. Tuesday
  40. 194

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