← Mixed trick challenge lesson New set →

Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 757 · 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.Double 37 =
  2. 2.71?3 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  3. 3.Double 23 =
  4. 4.Magic square (every row, column and diagonal has the same total): 14 15 ? | 9 13 17 | 16 11 12. What is the missing number?
  5. 5.9 × 10 = 9? — what is the missing digit?
  6. 6.If today is Wednesday, what day was it 23 days ago? (a) Sunday (b) Monday (c) Thursday (d) Tuesday
  7. 7.495 + 594 =
  8. 8.A father is 41 years old and his son is 12. How old was the father when the son was born?
  9. 9.9 × 5 = ?5 — what is the missing digit?
  10. 10.Think of 11. Multiply it by 2, then add 6. What number do you end with?
  11. 11.I thought of a number, added 1 and then doubled it. I got 32. What was my number?
  12. 12.A father is 42 years old and his son is 9. How old was the father when the son was born?
  13. 13.In 4 years a boy will be 15 years old. How old was he 4 years ago?
  14. 14.Magic square (every row, column and diagonal has the same total): 6 11 4 | 5 7 ? | 10 3 8. What is the missing number?
  15. 15.What comes next? 1, 2, 4, 8, ? (a) 17 (b) 12 (c) 16 (d) 14
  16. 16.If today is Wednesday, what day was it 54 days ago? (a) Saturday (b) Friday (c) Monday (d) Thursday
  17. 17.9 × 9 = ?1 — what is the missing digit?
  18. 18.Magic square (every row, column and diagonal has the same total): 7 21 11 | 17 13 ? | 15 5 19. What is the missing number?
  19. 19.9 × 6 = 5? — what is the missing digit?
  20. 20.Odd one out: which number is NOT in the 5 times table? (a) 12 (b) 15 (c) 25 (d) 10
  21. 21.4 × 9 =
  22. 22.A girl is 6 years old and her brother is 2 years older. How old will her brother be in 6 years?
  23. 23.9 × 6 =
  24. 24.376 × 10 =
  25. 25.34 × 4 =
  26. 26.33 × ? = 33000
  27. 27.If today is Sunday, what day will it be after 77 days? (a) Wednesday (b) Saturday (c) Monday (d) Sunday
  28. 28.I thought of a number, added 5 and then doubled it. I got 18. What was my number?
  29. 29.I thought of a number, added 3 and then doubled it. I got 38. What was my number?
  30. 30.Magic trick! Think of 15. Double it, add 4, halve it, then take away 15. What number do you get?
  31. 31.The 6th of a month is a Wednesday. What day is the 16th of the same month? (a) Sunday (b) Friday (c) Tuesday (d) Saturday
  32. 32.25 × ? = 25000
  33. 33.Magic square (every row, column and diagonal has the same total): 8 13 12 | 15 ? 7 | 10 9 14. What is the missing number?
  34. 34.What comes next? 2, 4, 8, 16, ? (a) 28 (b) 32 (c) 24 (d) 33
  35. 35.If today is Tuesday, what day was it 54 days ago? (a) Thursday (b) Friday (c) Sunday (d) Wednesday
  36. 36.14 × 4 =
  37. 37.122 × 10 =
  38. 38.3 × 9 =
  39. 39.Odd one out: which number is NOT in the 4 times table? (a) 24 (b) 16 (c) 23 (d) 32
  40. 40.What comes next? 1, 4, 9, 16, ? (a) 23 (b) 25 (c) 27 (d) 26

Answer key

  1. 74
  2. 7
  3. 46
  4. 10
  5. 0
  6. Monday
  7. 1089
  8. 29
  9. 4
  10. 28
  11. 15
  12. 33
  13. 7
  14. 9
  15. 16
  16. Friday
  17. 8
  18. 9
  19. 4
  20. 12
  21. 36
  22. 14
  23. 54
  24. 3760
  25. 136
  26. 1000
  27. Sunday
  28. 4
  29. 16
  30. 2
  31. Saturday
  32. 1000
  33. 11
  34. 32
  35. Thursday
  36. 56
  37. 1220
  38. 27
  39. 23
  40. 25

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