← Mixed trick challenge lesson New set →

Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 186 · 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. 1.7 × 9 =
  2. 2.A girl is 5 years old and her brother is 3 years older. How old will her brother be in 8 years?
  3. 3.51 × 100 =
  4. 4.Magic square (every row, column and diagonal has the same total): 6 7 ? | 1 5 9 | 8 3 4. What is the missing number?
  5. 5.Double 91 =
  6. 6.Magic square (every row, column and diagonal has the same total): 13 27 17 | 23 19 15 | 21 ? 25. What is the missing number?
  7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
  8. 8.9 × 4 =
  9. 9.9 × 9 = ?1 — what is the missing digit?
  10. 10.Magic square (every row, column and diagonal has the same total): 7 2 ? | 8 6 4 | 3 10 5. What is the missing number?
  11. 11.Half of 116 =
  12. 12.1 + 2 + 3 + … + 80 =
  13. 13.Magic trick! Think of 14. Double it, add 4, halve it, then take away 14. What number do you get?
  14. 14.Think of 10. Multiply it by 2, then add 1. What number do you end with?
  15. 15.Magic square (every row, column and diagonal has the same total): 12 7 8 | 5 9 ? | 10 11 6. What is the missing number?
  16. 16.9 × 4 = 3? — what is the missing digit?
  17. 17.Double 99 =
  18. 18.?186 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  19. 19.552 × 10 =
  20. 20.Double 28 =
  21. 21.?583 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  22. 22.I thought of a number, added 3 and then doubled it. I got 16. What was my number?
  23. 23.9 × 10 = 9? — what is the missing digit?
  24. 24.Think of 8. Multiply it by 5, then add 3. What number do you end with?
  25. 25.7?8 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  26. 26.3?02 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  27. 27.I thought of a number, added 4 and then doubled it. I got 32. What was my number?
  28. 28.Magic square (every row, column and diagonal has the same total): 8 29 14 | 23 ? 11 | 20 5 26. What is the missing number?
  29. 29.Do the 1089 trick with 770: reverse and subtract, then reverse that answer and add. What do you get?
  30. 30.9 × 6 = ?4 — what is the missing digit?
  31. 31.22?8 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  32. 32.45 × 100 =
  33. 33.If today is Monday, what day was it 14 days ago? (a) Tuesday (b) Sunday (c) Monday (d) Thursday
  34. 34.8 × 9 =
  35. 35.5 × 9 =
  36. 36.What comes next? 2, 4, 8, 16, ? (a) 24 (b) 28 (c) 32 (d) 33
  37. 37.12345678 × 8 + 8 =
  38. 38.Take 270. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  39. 39.I thought of a number, added 7 and then doubled it. I got 44. What was my number?
  40. 40.9 × 5 = ?5 — what is the missing digit?

Answer key

  1. 63
  2. 16
  3. 5100
  4. 2
  5. 182
  6. 11
  7. 198
  8. 36
  9. 8
  10. 9
  11. 58
  12. 3240
  13. 2
  14. 21
  15. 13
  16. 6
  17. 198
  18. 3
  19. 5520
  20. 56
  21. 2
  22. 5
  23. 0
  24. 43
  25. 3
  26. 4
  27. 12
  28. 17
  29. 1089
  30. 5
  31. 6
  32. 4500
  33. Monday
  34. 72
  35. 45
  36. 32
  37. 98765432
  38. 198
  39. 15
  40. 4

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