← Mixed trick challenge lesson New set →

Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 539 · 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. 1.9 × 5 = ?5 — what is the missing digit?
  2. 2.48 × 4 =
  3. 3.60 × 4 =
  4. 4.I thought of a number, multiplied it by 4 and added 3. I got 55. What was my number?
  5. 5.The 9th of a month is a Sunday. What day is the 17th of the same month? (a) Sunday (b) Tuesday (c) Thursday (d) Monday
  6. 6.A girl is 7 years old and her brother is 6 years older. How old will her brother be in 5 years?
  7. 7.What comes next? 36, 49, 64, 81, ? (a) 101 (b) 100 (c) 102 (d) 98
  8. 8.?536 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  9. 9.15 × 4 =
  10. 10.38 × 4 =
  11. 11.Take 89 and take away the sum of its digits. What do you get?
  12. 12.Magic trick! Think of 16. Double it, add 12, halve it, then take away 16. What number do you get?
  13. 13.123456 × 8 + 6 =
  14. 14.Double 14 =
  15. 15.Do the 1089 trick with 317: reverse and subtract, then reverse that answer and add. What do you get?
  16. 16.A piggy bank has 3 coins of ₹5 and 14 coins of ₹2. How many rupees are in it?
  17. 17.46 × 4 =
  18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
  19. 19.You have 6 coins. Each coin is ₹1 or ₹2, and together they make ₹10. How many ₹2 coins do you have?
  20. 20.12345679 × 81 =
  21. 21.1 + 3 + 5 + … + 11 =
  22. 22.The 9th of a month is a Monday. What day is the 19th of the same month? (a) Wednesday (b) Friday (c) Sunday (d) Thursday
  23. 23.16 × 4 =
  24. 24.A piggy bank has 4 coins of ₹5 and 5 coins of ₹2. How many rupees are in it?
  25. 25.A girl is 8 years old and her brother is 6 years older. How old will her brother be in 3 years?
  26. 26.The 4th of a month is a Wednesday. What day is the 13th of the same month? (a) Thursday (b) Friday (c) Saturday (d) Monday
  27. 27.Half of 24 =
  28. 28.46 × 1000 =
  29. 29.Double 64 =
  30. 30.Magic square (every row, column and diagonal has the same total): 6 27 12 | ? 15 9 | 18 3 24. What is the missing number?
  31. 31.Half of 32 =
  32. 32.What comes next? 16, 25, 36, 49, ? (a) 62 (b) 66 (c) 64 (d) 65
  33. 33.31 × ? = 3100
  34. 34.9 × 6 = 5? — what is the missing digit?
  35. 35.Take 933. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  36. 36.53 × 4 =
  37. 37.32 × 1000 =
  38. 38.I thought of a number, multiplied it by 5 and added 6. I got 61. What was my number?
  39. 39.9 × 10 =
  40. 40.9 × 6 = ?4 — what is the missing digit?

Answer key

  1. 4
  2. 192
  3. 240
  4. 13
  5. Monday
  6. 18
  7. 100
  8. 4
  9. 60
  10. 152
  11. 72
  12. 6
  13. 987654
  14. 28
  15. 1089
  16. 43
  17. 184
  18. 495
  19. 4
  20. 999999999
  21. 36
  22. Thursday
  23. 64
  24. 30
  25. 17
  26. Friday
  27. 12
  28. 46000
  29. 128
  30. 21
  31. 16
  32. 64
  33. 100
  34. 4
  35. 594
  36. 212
  37. 32000
  38. 11
  39. 90
  40. 5

Free maths tricks lessons, practice and worksheets at talentjr.in/maths-tricks