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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 48 · 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 10 ? | 16 12 8 | 9 14 13. What is the missing number?
  2. 2.544 × 10 =
  3. 3.12345 × 8 + 5 =
  4. 4.The 9th of a month is a Sunday. What day is the 22nd of the same month? (a) Saturday (b) Friday (c) Sunday (d) Tuesday
  5. 5.123 × 9 + 4 =
  6. 6.53 × 100 =
  7. 7.A father is 45 years old and his son is 8. How old was the father when the son was born?
  8. 8.28 × 4 =
  9. 9.Double 23 =
  10. 10.Magic square (every row, column and diagonal has the same total): 11 6 7 | 4 ? 12 | 9 10 5. What is the missing number?
  11. 11.The 5th of a month is a Monday. What day is the 26th of the same month? (a) Thursday (b) Tuesday (c) Monday (d) Sunday
  12. 12.37 × 3 =
  13. 13.Half of 92 =
  14. 14.A piggy bank has 2 coins of ₹5 and 12 coins of ₹2. How many rupees are in it?
  15. 15.You have 6 coins. Each coin is ₹1 or ₹2, and together they make ₹9. How many ₹2 coins do you have?
  16. 16.1 + 3 + 5 + … + 37 =
  17. 17.Double 58 =
  18. 18.9 × 7 = ?3 — what is the missing digit?
  19. 19.12345678 × 9 + 9 =
  20. 20.Half of 182 =
  21. 21.Double 48 =
  22. 22.A father is 30 years old and his son is 8. How old was the father when the son was born?
  23. 23.What comes next? 4, 8, 16, 32, ? (a) 56 (b) 48 (c) 64 (d) 65
  24. 24.1 + 2 + 3 + … + 74 =
  25. 25.If today is Sunday, what day was it 16 days ago? (a) Friday (b) Thursday (c) Saturday (d) Monday
  26. 26.A girl is 12 years old and her brother is 3 years older. How old will her brother be in 2 years?
  27. 27.Take 53 and take away the sum of its digits. What do you get?
  28. 28.9 × 4 = 3? — what is the missing digit?
  29. 29.8 × 9 =
  30. 30.9 × 6 =
  31. 31.45 × 4 =
  32. 32.9 × 3 =
  33. 33.Magic square (every row, column and diagonal has the same total): 17 10 15 | 12 ? 16 | 13 18 11. What is the missing number?
  34. 34.If today is Wednesday, what day was it 24 days ago? (a) Saturday (b) Monday (c) Sunday (d) Wednesday
  35. 35.1 + 3 + 5 + … + 39 =
  36. 36.Magic trick! Think of 9. Double it, add 8, halve it, then take away 9. What number do you get?
  37. 37.395 × 10 =
  38. 38.1 + 2 + 3 + … + 98 =
  39. 39.1 × 9 =
  40. 40.If today is Monday, what day will it be after 99 days? (a) Tuesday (b) Friday (c) Monday (d) Wednesday

Answer key

  1. 15
  2. 5440
  3. 98765
  4. Saturday
  5. 1111
  6. 5300
  7. 37
  8. 112
  9. 46
  10. 8
  11. Monday
  12. 111
  13. 46
  14. 34
  15. 3
  16. 361
  17. 116
  18. 6
  19. 111111111
  20. 91
  21. 96
  22. 22
  23. 64
  24. 2775
  25. Friday
  26. 17
  27. 45
  28. 6
  29. 72
  30. 54
  31. 180
  32. 27
  33. 14
  34. Sunday
  35. 400
  36. 4
  37. 3950
  38. 4851
  39. 9
  40. Tuesday

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