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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 667 · 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): 11 ? 9 | 6 8 10 | 7 12 5. What is the missing number?
  2. 2.6 × 9 =
  3. 3.60 × 4 =
  4. 4.Magic square (every row, column and diagonal has the same total): 31 10 25 | ? 22 28 | 19 34 13. What is the missing number?
  5. 5.3 × 9 =
  6. 6.Half of 164 =
  7. 7.Magic square (every row, column and diagonal has the same total): 12 27 6 | ? 15 21 | 24 3 18. What is the missing number?
  8. 8.6 × 4 =
  9. 9.4?42 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  10. 10.26 × 4 =
  11. 11.792 + 297 =
  12. 12.Double 94 =
  13. 13.9 × 9 = ?1 — what is the missing digit?
  14. 14.9 × 3 = 2? — what is the missing digit?
  15. 15.If today is Friday, what day was it 44 days ago? (a) Wednesday (b) Tuesday (c) Saturday (d) Thursday
  16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
  17. 17.What comes next? 25, 36, 49, 64, ? (a) 79 (b) 82 (c) 83 (d) 81
  18. 18.17 × 1000 =
  19. 19.37 × 3 =
  20. 20.9 × 9 =
  21. 21.5 × 9 =
  22. 22.Half of 86 =
  23. 23.12345679 × 81 =
  24. 24.Take 296. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  25. 25.What comes next? 6, 12, 18, 24, ? (a) 24 (b) 30 (c) 31 (d) 36
  26. 26.9 × 1 =
  27. 27.Magic square (every row, column and diagonal has the same total): 25 10 13 | 4 16 ? | 19 22 7. What is the missing number?
  28. 28.Half of 102 =
  29. 29.In 2 years a boy will be 15 years old. How old was he 3 years ago?
  30. 30.11 × 11 =
  31. 31.You have 7 coins. Each coin is ₹1 or ₹2, and together they make ₹9. How many ₹2 coins do you have?
  32. 32.?041 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  33. 33.If today is Friday, what day was it 15 days ago? (a) Sunday (b) Wednesday (c) Thursday (d) Friday
  34. 34.9 × 3 =
  35. 35.Magic square (every row, column and diagonal has the same total): 11 6 13 | 12 10 ? | 7 14 9. What is the missing number?
  36. 36.What comes next? 4, 9, 16, 25, ? (a) 37 (b) 38 (c) 34 (d) 36
  37. 37.Double 91 =
  38. 38.1 + 3 + 5 + … + 45 =
  39. 39.63 × 100 =
  40. 40.1 + 3 + 5 + … + 23 =

Answer key

  1. 4
  2. 54
  3. 240
  4. 16
  5. 27
  6. 82
  7. 9
  8. 24
  9. 8
  10. 104
  11. 1089
  12. 188
  13. 8
  14. 7
  15. Wednesday
  16. 891
  17. 81
  18. 17000
  19. 111
  20. 81
  21. 45
  22. 43
  23. 999999999
  24. 396
  25. 30
  26. 9
  27. 28
  28. 51
  29. 10
  30. 121
  31. 2
  32. 4
  33. Thursday
  34. 27
  35. 8
  36. 36
  37. 182
  38. 529
  39. 6300
  40. 144

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