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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 321 · 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.What comes next? 1, 2, 4, 8, ? (a) 14 (b) 16 (c) 12 (d) 17
  2. 2.Take 80 and take away the sum of its digits. What do you get?
  3. 3.The 7th of a month is a Friday. What day is the 20th of the same month? (a) Friday (b) Sunday (c) Thursday (d) Wednesday
  4. 4.Magic square (every row, column and diagonal has the same total): 13 34 19 | 28 22 16 | ? 10 31. What is the missing number?
  5. 5.8 × 4 =
  6. 6.9 × 6 = ?4 — what is the missing digit?
  7. 7.12345679 × 9 =
  8. 8.What comes next? 25, 36, 49, 64, ? (a) 81 (b) 79 (c) 83 (d) 82
  9. 9.9 × 2 =
  10. 10.22 × 4 =
  11. 11.What comes next? 1, 7, 13, 19, ? (a) 31 (b) 19 (c) 26 (d) 25
  12. 12.9 × 3 = ?7 — what is the missing digit?
  13. 13.Half of 106 =
  14. 14.1 + 2 + 3 + … + 84 =
  15. 15.6 × 9 =
  16. 16.What comes next? 17, 19, 21, 23, ? (a) 26 (b) 23 (c) 27 (d) 25
  17. 17.1 + 3 + 5 + … + 13 =
  18. 18.869 × 10 =
  19. 19.You have 6 coins. Each coin is ₹1 or ₹2, and together they make ₹7. How many ₹2 coins do you have?
  20. 20.Do the 1089 trick with 933: reverse and subtract, then reverse that answer and add. What do you get?
  21. 21.Magic square (every row, column and diagonal has the same total): 6 5 10 | 11 7 3 | 4 9 ?. What is the missing number?
  22. 22.I thought of a number, added 1 and then doubled it. I got 26. What was my number?
  23. 23.Magic square (every row, column and diagonal has the same total): 14 9 10 | 7 11 15 | 12 13 ?. What is the missing number?
  24. 24.9 × 8 = ?2 — what is the missing digit?
  25. 25.Do the 1089 trick with 476: reverse and subtract, then reverse that answer and add. What do you get?
  26. 26.Take 269. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  27. 27.9 × 9 =
  28. 28.6 × 4 =
  29. 29.53?7 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  30. 30.398 × 10 =
  31. 31.2 × 9 =
  32. 32.52? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  33. 33.Half of 42 =
  34. 34.Magic trick! Think of 8. Double it, add 14, halve it, then take away 8. What number do you get?
  35. 35.What comes next? 3, 6, 12, 24, ? (a) 48 (b) 36 (c) 42 (d) 49
  36. 36.Do the 1089 trick with 449: reverse and subtract, then reverse that answer and add. What do you get?
  37. 37.?304 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  38. 38.A father is 43 years old and his son is 6. How old was the father when the son was born?
  39. 39.9 × 4 = ?6 — what is the missing digit?
  40. 40.The 2nd of a month is a Thursday. What day is the 12th of the same month? (a) Saturday (b) Sunday (c) Monday (d) Wednesday

Answer key

  1. 16
  2. 72
  3. Thursday
  4. 25
  5. 32
  6. 5
  7. 111111111
  8. 81
  9. 18
  10. 88
  11. 25
  12. 2
  13. 53
  14. 3570
  15. 54
  16. 25
  17. 49
  18. 8690
  19. 1
  20. 1089
  21. 8
  22. 12
  23. 8
  24. 7
  25. 1089
  26. 693
  27. 81
  28. 24
  29. 3
  30. 3980
  31. 18
  32. 2
  33. 21
  34. 7
  35. 48
  36. 1089
  37. 2
  38. 37
  39. 3
  40. Sunday

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