← Mixed trick challenge lesson New set →

Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 805 · 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. 1.30 × 4 =
  2. 2.123456 × 8 + 6 =
  3. 3.1 + 3 + 5 + … + 29 =
  4. 4.Do the 1089 trick with 814: reverse and subtract, then reverse that answer and add. What do you get?
  5. 5.37 × 12 =
  6. 6.9 × 2 = ?8 — what is the missing digit?
  7. 7.23 × 4 =
  8. 8.Magic square (every row, column and diagonal has the same total): 10 ? 16 | 25 19 13 | 22 7 28. What is the missing number?
  9. 9.Magic square (every row, column and diagonal has the same total): 21 11 ? | 7 15 23 | 17 19 9. What is the missing number?
  10. 10.2 × 9 =
  11. 11.Magic square (every row, column and diagonal has the same total): 8 1 6 | 3 ? 7 | 4 9 2. What is the missing number?
  12. 12.I thought of a number, multiplied it by 4 and added 8. I got 32. What was my number?
  13. 13.9 × 6 = 5? — what is the missing digit?
  14. 14.The 4th of a month is a Tuesday. What day is the 13th of the same month? (a) Thursday (b) Sunday (c) Friday (d) Wednesday
  15. 15.Take 43 and take away the sum of its digits. What do you get?
  16. 16.25? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  17. 17.Magic square (every row, column and diagonal has the same total): 14 11 ? | 29 17 5 | 8 23 20. What is the missing number?
  18. 18.12 × 9 + 3 =
  19. 19.3?61 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  20. 20.12345 × 8 + 5 =
  21. 21.The ages of two twins add up to 28. How old is each twin?
  22. 22.5 × 9 =
  23. 23.9 × 4 = ?6 — what is the missing digit?
  24. 24.A girl is 9 years old and her brother is 3 years older. How old will her brother be in 3 years?
  25. 25.A piggy bank has 4 coins of ₹5 and 2 coins of ₹2. How many rupees are in it?
  26. 26.1 + 2 + 3 + … + 27 =
  27. 27.A father is 41 years old and his son is 9. How old was the father when the son was born?
  28. 28.What comes next? 9, 11, 13, 15, ? (a) 18 (b) 15 (c) 17 (d) 19
  29. 29.Do the 1089 trick with 479: reverse and subtract, then reverse that answer and add. What do you get?
  30. 30.Magic trick! Think of 3. Double it, add 16, halve it, then take away 3. What number do you get?
  31. 31.Half of 142 =
  32. 32.901 × 10 =
  33. 33.What comes next? 16, 25, 36, 49, ? (a) 62 (b) 64 (c) 65 (d) 66
  34. 34.544? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  35. 35.610? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  36. 36.Odd one out: which number is NOT in the 5 times table? (a) 20 (b) 30 (c) 35 (d) 14
  37. 37.61 × ? = 6100
  38. 38.If today is Monday, what day will it be after 80 days? (a) Friday (b) Sunday (c) Wednesday (d) Thursday
  39. 39.33 × 100 =
  40. 40.9 × 10 =

Answer key

  1. 120
  2. 987654
  3. 225
  4. 1089
  5. 444
  6. 1
  7. 92
  8. 31
  9. 13
  10. 18
  11. 5
  12. 6
  13. 4
  14. Thursday
  15. 36
  16. 2
  17. 26
  18. 111
  19. 8
  20. 98765
  21. 14
  22. 45
  23. 3
  24. 15
  25. 24
  26. 378
  27. 32
  28. 17
  29. 1089
  30. 8
  31. 71
  32. 9010
  33. 64
  34. 5
  35. 2
  36. 14
  37. 100
  38. Thursday
  39. 3300
  40. 90

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