← Mixed trick challenge lesson New set →

Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 754 · 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.Magic square (every row, column and diagonal has the same total): 10 11 6 | 5 ? 13 | 12 7 8. What is the missing number?
  2. 2.1 + 2 + 3 + … + 32 =
  3. 3.26 × 4 =
  4. 4.12345679 × 54 =
  5. 5.9 × 2 = ?8 — what is the missing digit?
  6. 6.13 × 4 =
  7. 7.9 × 10 = ?0 — what is the missing digit?
  8. 8.1234567 × 9 + 8 =
  9. 9.9 × 9 = ?1 — what is the missing digit?
  10. 10.1234567 × 8 + 7 =
  11. 11.7?66 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  12. 12.Think of 14. Multiply it by 4, then add 6. What number do you end with?
  13. 13.Do the 1089 trick with 179: reverse and subtract, then reverse that answer and add. What do you get?
  14. 14.Take 641. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  15. 15.9 × 10 = 9? — what is the missing digit?
  16. 16.What comes next? 5, 10, 20, 40, ? (a) 70 (b) 81 (c) 80 (d) 60
  17. 17.934 × ? = 9340
  18. 18.What comes next? 4, 7, 10, 13, ? (a) 16 (b) 19 (c) 17 (d) 13
  19. 19.9 × 9 =
  20. 20.9 × 8 = 7? — what is the missing digit?
  21. 21.The ages of two twins add up to 30. How old is each twin?
  22. 22.297 + 792 =
  23. 23.12345679 × 18 =
  24. 24.Take 58 and take away the sum of its digits. What do you get?
  25. 25.123456789 × 8 + 9 =
  26. 26.1 + 2 + 3 + … + 37 =
  27. 27.19 × 4 =
  28. 28.2 × 9 =
  29. 29.You have 14 coins. Each coin is ₹1 or ₹2, and together they make ₹20. How many ₹2 coins do you have?
  30. 30.12 × 9 + 3 =
  31. 31.Magic trick! Think of 12. Double it, add 10, halve it, then take away 12. What number do you get?
  32. 32.16 × 4 =
  33. 33.47 × 4 =
  34. 34.If today is Tuesday, what day will it be after 85 days? (a) Wednesday (b) Tuesday (c) Thursday (d) Saturday
  35. 35.Magic square (every row, column and diagonal has the same total): 11 ? 9 | 10 12 14 | 15 8 13. What is the missing number?
  36. 36.1 + 2 + 3 + … + 75 =
  37. 37.9 × 9 = 8? — what is the missing digit?
  38. 38.Magic square (every row, column and diagonal has the same total): 25 15 17 | 11 19 27 | ? 23 13. What is the missing number?
  39. 39.69? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  40. 40.The 4th of a month is a Friday. What day is the 13th of the same month? (a) Saturday (b) Monday (c) Wednesday (d) Sunday

Answer key

  1. 9
  2. 528
  3. 104
  4. 666666666
  5. 1
  6. 52
  7. 9
  8. 11111111
  9. 8
  10. 9876543
  11. 8
  12. 62
  13. 1089
  14. 495
  15. 0
  16. 80
  17. 10
  18. 16
  19. 81
  20. 2
  21. 15
  22. 1089
  23. 222222222
  24. 45
  25. 987654321
  26. 703
  27. 76
  28. 18
  29. 6
  30. 111
  31. 5
  32. 64
  33. 188
  34. Wednesday
  35. 16
  36. 2850
  37. 1
  38. 21
  39. 3
  40. Sunday

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