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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 366 · 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.You have 8 coins. Each coin is ₹1 or ₹2, and together they make ₹11. How many ₹2 coins do you have?
  2. 2.A father is 40 years old and his son is 8. How old was the father when the son was born?
  3. 3.9 × 9 = ?1 — what is the missing digit?
  4. 4.46 × 4 =
  5. 5.1 + 2 + 3 + … + 34 =
  6. 6.9 × 3 = 2? — what is the missing digit?
  7. 7.9 × 3 = ?7 — what is the missing digit?
  8. 8.123456 × 8 + 6 =
  9. 9.What comes next? 13, 16, 19, 22, ? (a) 25 (b) 28 (c) 22 (d) 26
  10. 10.9 × 8 =
  11. 11.786? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  12. 12.35 × 1000 =
  13. 13.9 × 9 =
  14. 14.What comes next? 16, 25, 36, 49, ? (a) 64 (b) 62 (c) 65 (d) 66
  15. 15.What comes next? 19, 23, 27, 31, ? (a) 31 (b) 35 (c) 39 (d) 36
  16. 16.You have 12 coins. Each coin is ₹1 or ₹2, and together they make ₹23. How many ₹2 coins do you have?
  17. 17.18 × 4 =
  18. 18.Take 37 and take away the sum of its digits. What do you get?
  19. 19.Magic square (every row, column and diagonal has the same total): 13 ? 9 | 11 15 19 | 21 7 17. What is the missing number?
  20. 20.A father is 38 years old and his son is 13. How old was the father when the son was born?
  21. 21.Magic square (every row, column and diagonal has the same total): 24 ? 18 | 9 15 21 | 12 27 6. What is the missing number?
  22. 22.Magic square (every row, column and diagonal has the same total): 12 14 4 | 2 10 18 | 16 6 ?. What is the missing number?
  23. 23.The 1st of a month is a Friday. What day is the 13th of the same month? (a) Thursday (b) Saturday (c) Wednesday (d) Tuesday
  24. 24.Double 73 =
  25. 25.Magic square (every row, column and diagonal has the same total): 7 28 13 | ? 16 10 | 19 4 25. What is the missing number?
  26. 26.9 × 8 = 7? — what is the missing digit?
  27. 27.9 × 3 =
  28. 28.If today is Thursday, what day will it be after 78 days? (a) Friday (b) Monday (c) Saturday (d) Thursday
  29. 29.25?2 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  30. 30.Think of 5. Multiply it by 3, then add 2. What number do you end with?
  31. 31.The 7th of a month is a Tuesday. What day is the 19th of the same month? (a) Sunday (b) Wednesday (c) Monday (d) Saturday
  32. 32.Take 63 and take away the sum of its digits. What do you get?
  33. 33.Take 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  34. 34.I thought of a number, added 6 and then doubled it. I got 28. What was my number?
  35. 35.Magic square (every row, column and diagonal has the same total): 17 19 9 | 7 15 23 | ? 11 13. What is the missing number?
  36. 36.What comes next? 2, 10, 18, 26, ? (a) 34 (b) 42 (c) 26 (d) 35
  37. 37.Double 85 =
  38. 38.13 × 1000 =
  39. 39.A father is 44 years old and his son is 4. How old was the father when the son was born?
  40. 40.In 6 years a boy will be 16 years old. How old was he 2 years ago?

Answer key

  1. 3
  2. 32
  3. 8
  4. 184
  5. 595
  6. 7
  7. 2
  8. 987654
  9. 25
  10. 72
  11. 6
  12. 35000
  13. 81
  14. 64
  15. 35
  16. 11
  17. 72
  18. 27
  19. 23
  20. 25
  21. 3
  22. 8
  23. Wednesday
  24. 146
  25. 22
  26. 2
  27. 27
  28. Friday
  29. 9
  30. 17
  31. Sunday
  32. 54
  33. 792
  34. 8
  35. 21
  36. 34
  37. 170
  38. 13000
  39. 40
  40. 8

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