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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 472 · 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.A father is 37 years old and his son is 14. How old was the father when the son was born?
  2. 2.The 4th of a month is a Wednesday. What day is the 28th of the same month? (a) Friday (b) Saturday (c) Sunday (d) Tuesday
  3. 3.Odd one out: which number is NOT in the 7 times table? (a) 56 (b) 28 (c) 35 (d) 69
  4. 4.44 × 4 =
  5. 5.The 2nd of a month is a Sunday. What day is the 14th of the same month? (a) Monday (b) Friday (c) Saturday (d) Thursday
  6. 6.Think of 3. Multiply it by 5, then add 1. What number do you end with?
  7. 7.What comes next? 17, 20, 23, 26, ? (a) 26 (b) 32 (c) 30 (d) 29
  8. 8.9 × 2 = ?8 — what is the missing digit?
  9. 9.9 × 10 =
  10. 10.11 × ? = 1100
  11. 11.Double 18 =
  12. 12.12345679 × 72 =
  13. 13.9 × 1000 =
  14. 14.What comes next? 4, 9, 16, 25, ? (a) 34 (b) 36 (c) 38 (d) 37
  15. 15.Think of 7. Multiply it by 2, then add 2. What number do you end with?
  16. 16.9 × 3 = 2? — what is the missing digit?
  17. 17.You have 5 coins. Each coin is ₹1 or ₹2, and together they make ₹9. How many ₹2 coins do you have?
  18. 18.In 6 years a boy will be 18 years old. How old was he 6 years ago?
  19. 19.1234 × 9 + 5 =
  20. 20.I thought of a number, added 9 and then doubled it. I got 32. What was my number?
  21. 21.858 × ? = 8580
  22. 22.Magic square (every row, column and diagonal has the same total): 16 6 8 | ? 10 18 | 12 14 4. What is the missing number?
  23. 23.60 × 4 =
  24. 24.9 × 4 = 3? — what is the missing digit?
  25. 25.8 × 9 =
  26. 26.If today is Friday, what day was it 59 days ago? (a) Friday (b) Monday (c) Tuesday (d) Wednesday
  27. 27.The 5th of a month is a Wednesday. What day is the 17th of the same month? (a) Tuesday (b) Sunday (c) Monday (d) Thursday
  28. 28.1234567 × 8 + 7 =
  29. 29.12345679 × 9 =
  30. 30.You have 12 coins. Each coin is ₹1 or ₹2, and together they make ₹13. How many ₹2 coins do you have?
  31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
  32. 32.Double 63 =
  33. 33.24 × 4 =
  34. 34.What comes next? 11, 19, 27, 35, ? (a) 51 (b) 43 (c) 35 (d) 44
  35. 35.9 × 7 = ?3 — what is the missing digit?
  36. 36.3 × 9 =
  37. 37.9 × 4 = ?6 — what is the missing digit?
  38. 38.6 × 9 =
  39. 39.Half of 162 =
  40. 40.1 + 2 + 3 + … + 43 =

Answer key

  1. 23
  2. Saturday
  3. 69
  4. 176
  5. Friday
  6. 16
  7. 29
  8. 1
  9. 90
  10. 100
  11. 36
  12. 888888888
  13. 9000
  14. 36
  15. 16
  16. 7
  17. 4
  18. 6
  19. 11111
  20. 7
  21. 10
  22. 2
  23. 240
  24. 6
  25. 72
  26. Tuesday
  27. Monday
  28. 9876543
  29. 111111111
  30. 1
  31. 396
  32. 126
  33. 96
  34. 43
  35. 6
  36. 27
  37. 3
  38. 54
  39. 81
  40. 946

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