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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 296 · 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. 1.297 + 792 =
  2. 2.A girl is 12 years old and her brother is 6 years older. How old will her brother be in 5 years?
  3. 3.21 × 1000 =
  4. 4.What comes next? 9, 16, 25, 36, ? (a) 50 (b) 47 (c) 49 (d) 51
  5. 5.9 × 8 = 7? — what is the missing digit?
  6. 6.Half of 72 =
  7. 7.A girl is 6 years old and her brother is 6 years older. How old will her brother be in 4 years?
  8. 8.Half of 56 =
  9. 9.6?58 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  10. 10.Take 741. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  11. 11.The 8th of a month is a Saturday. What day is the 24th of the same month? (a) Thursday (b) Monday (c) Tuesday (d) Sunday
  12. 12.Magic trick! Think of 6. Double it, add 10, halve it, then take away 6. What number do you get?
  13. 13.32 × 4 =
  14. 14.If today is Monday, what day will it be after 16 days? (a) Tuesday (b) Wednesday (c) Saturday (d) Thursday
  15. 15.Think of 12. Multiply it by 5, then add 9. What number do you end with?
  16. 16.I thought of a number, multiplied it by 5 and added 2. I got 52. What was my number?
  17. 17.A piggy bank has 5 coins of ₹5 and 3 coins of ₹2. How many rupees are in it?
  18. 18.The 8th of a month is a Monday. What day is the 19th of the same month? (a) Friday (b) Monday (c) Saturday (d) Thursday
  19. 19.I thought of a number, multiplied it by 3 and added 3. I got 36. What was my number?
  20. 20.Double 59 =
  21. 21.Magic square (every row, column and diagonal has the same total): ? 11 21 | 23 15 7 | 9 19 17. What is the missing number?
  22. 22.Magic trick! Think of 12. Double it, add 4, halve it, then take away 12. What number do you get?
  23. 23.9 × 3 = ?7 — what is the missing digit?
  24. 24.9 × 4 = ?6 — what is the missing digit?
  25. 25.9 × 3 = 2? — what is the missing digit?
  26. 26.939 × 10 =
  27. 27.26 × 4 =
  28. 28.Half of 152 =
  29. 29.Magic square (every row, column and diagonal has the same total): 26 11 32 | 29 23 17 | 14 35 ?. What is the missing number?
  30. 30.12345679 × 54 =
  31. 31.What comes next? 12, 19, 26, 33, ? (a) 41 (b) 33 (c) 47 (d) 40
  32. 32.You have 5 coins. Each coin is ₹1 or ₹2, and together they make ₹9. How many ₹2 coins do you have?
  33. 33.A girl is 7 years old and her brother is 2 years older. How old will her brother be in 6 years?
  34. 34.If today is Wednesday, what day will it be after 28 days? (a) Tuesday (b) Thursday (c) Wednesday (d) Saturday
  35. 35.9 × 3 =
  36. 36.29 × 1000 =
  37. 37.The 6th of a month is a Thursday. What day is the 14th of the same month? (a) Friday (b) Saturday (c) Monday (d) Thursday
  38. 38.54 × 4 =
  39. 39.55 × 4 =
  40. 40.Magic square (every row, column and diagonal has the same total): 14 ? 22 | 24 16 8 | 10 20 18. What is the missing number?

Answer key

  1. 1089
  2. 23
  3. 21000
  4. 49
  5. 2
  6. 36
  7. 16
  8. 28
  9. 8
  10. 594
  11. Monday
  12. 5
  13. 128
  14. Wednesday
  15. 69
  16. 10
  17. 31
  18. Friday
  19. 11
  20. 118
  21. 13
  22. 2
  23. 2
  24. 3
  25. 7
  26. 9390
  27. 104
  28. 76
  29. 20
  30. 666666666
  31. 40
  32. 4
  33. 15
  34. Wednesday
  35. 27
  36. 29000
  37. Friday
  38. 216
  39. 220
  40. 12

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