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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 925 · 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. 1.1 + 3 + 5 + … + 17 =
  2. 2.Magic trick! Think of 14. Double it, add 4, halve it, then take away 14. What number do you get?
  3. 3.Magic square (every row, column and diagonal has the same total): 16 9 14 | 11 13 15 | ? 17 10. What is the missing number?
  4. 4.What comes next? 25, 36, 49, 64, ? (a) 83 (b) 79 (c) 82 (d) 81
  5. 5.Do the 1089 trick with 129: reverse and subtract, then reverse that answer and add. What do you get?
  6. 6.Magic square (every row, column and diagonal has the same total): 9 14 13 | 16 12 8 | 11 10 ?. What is the missing number?
  7. 7.11 × 4 =
  8. 8.12345678 × 9 + 9 =
  9. 9.9 × 4 = 3? — what is the missing digit?
  10. 10.You have 12 coins. Each coin is ₹1 or ₹2, and together they make ₹20. How many ₹2 coins do you have?
  11. 11.Half of 42 =
  12. 12.Double 27 =
  13. 13.703 × 10 =
  14. 14.What comes next? 3, 6, 12, 24, ? (a) 49 (b) 36 (c) 48 (d) 42
  15. 15.Magic square (every row, column and diagonal has the same total): 24 10 20 | ? 18 22 | 16 26 12. What is the missing number?
  16. 16.A father is 38 years old and his son is 6. How old was the father when the son was born?
  17. 17.1 + 3 + 5 + … + 35 =
  18. 18.19 × 4 =
  19. 19.25 × 4 =
  20. 20.A father is 33 years old and his son is 4. How old was the father when the son was born?
  21. 21.Half of 152 =
  22. 22.1 + 2 + 3 + … + 13 =
  23. 23.123456 × 9 + 7 =
  24. 24.9 × 4 = ?6 — what is the missing digit?
  25. 25.9 × 5 =
  26. 26.Magic square (every row, column and diagonal has the same total): ? 13 23 | 25 17 9 | 11 21 19. What is the missing number?
  27. 27.12345679 × 9 =
  28. 28.123 × 9 + 4 =
  29. 29.Odd one out: which number is NOT in the 4 times table? (a) 16 (b) 20 (c) 38 (d) 12
  30. 30.If today is Sunday, what day was it 35 days ago? (a) Wednesday (b) Saturday (c) Sunday (d) Monday
  31. 31.The 6th of a month is a Wednesday. What day is the 30th of the same month? (a) Sunday (b) Saturday (c) Friday (d) Tuesday
  32. 32.12345678 × 8 + 8 =
  33. 33.Magic square (every row, column and diagonal has the same total): 17 10 15 | ? 14 16 | 13 18 11. What is the missing number?
  34. 34.37 × 9 =
  35. 35.What comes next? 1, 2, 4, 8, ? (a) 17 (b) 16 (c) 12 (d) 14
  36. 36.12345679 × 63 =
  37. 37.?543 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  38. 38.10?6 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  39. 39.9 × 7 = 6? — what is the missing digit?
  40. 40.9 × 10 = 9? — what is the missing digit?

Answer key

  1. 81
  2. 2
  3. 12
  4. 81
  5. 1089
  6. 15
  7. 44
  8. 111111111
  9. 6
  10. 8
  11. 21
  12. 54
  13. 7030
  14. 48
  15. 14
  16. 32
  17. 324
  18. 76
  19. 100
  20. 29
  21. 76
  22. 91
  23. 1111111
  24. 3
  25. 45
  26. 15
  27. 111111111
  28. 1111
  29. 38
  30. Sunday
  31. Saturday
  32. 98765432
  33. 12
  34. 333
  35. 16
  36. 777777777
  37. 6
  38. 2
  39. 3
  40. 0

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