← Mixed trick challenge lesson New set →

Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 981 · 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.In 2 years a boy will be 15 years old. How old was he 4 years ago?
  2. 2.Half of 44 =
  3. 3.9 × 2 = 1? — what is the missing digit?
  4. 4.5 × 9 =
  5. 5.1 + 2 + 3 + … + 41 =
  6. 6.9 × 10 =
  7. 7.39?3 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  8. 8.Magic square (every row, column and diagonal has the same total): 22 12 14 | ? 16 24 | 18 20 10. What is the missing number?
  9. 9.9 × 3 = 2? — what is the missing digit?
  10. 10.38 × 4 =
  11. 11.Take 64 and take away the sum of its digits. What do you get?
  12. 12.What comes next? 5, 10, 20, 40, ? (a) 70 (b) 80 (c) 81 (d) 60
  13. 13.Odd one out: which number is NOT in the 9 times table? (a) 54 (b) 72 (c) 64 (d) 27
  14. 14.9 × 4 =
  15. 15.If today is Sunday, what day was it 20 days ago? (a) Tuesday (b) Sunday (c) Monday (d) Thursday
  16. 16.9 × 4 = 3? — what is the missing digit?
  17. 17.In 2 years a boy will be 10 years old. How old was he 2 years ago?
  18. 18.If today is Sunday, what day was it 18 days ago? (a) Saturday (b) Thursday (c) Tuesday (d) Wednesday
  19. 19.Odd one out: which number is NOT in the 6 times table? (a) 56 (b) 24 (c) 18 (d) 12
  20. 20.Half of 196 =
  21. 21.Half of 52 =
  22. 22.10 × 9 =
  23. 23.12345679 × 45 =
  24. 24.The ages of two twins add up to 10. How old is each twin?
  25. 25.If today is Friday, what day will it be after 62 days? (a) Sunday (b) Wednesday (c) Thursday (d) Friday
  26. 26.26?5 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  27. 27.1 + 2 + 3 + … + 97 =
  28. 28.23 × 4 =
  29. 29.Double 18 =
  30. 30.The 9th of a month is a Wednesday. What day is the 20th of the same month? (a) Monday (b) Saturday (c) Sunday (d) Wednesday
  31. 31.In 2 years a boy will be 16 years old. How old was he 2 years ago?
  32. 32.13 × ? = 13000
  33. 33.Magic square (every row, column and diagonal has the same total): 19 9 23 | 21 17 13 | ? 25 15. What is the missing number?
  34. 34.Do the 1089 trick with 985: reverse and subtract, then reverse that answer and add. What do you get?
  35. 35.Magic trick! Think of 7. Double it, add 14, halve it, then take away 7. What number do you get?
  36. 36.Double 92 =
  37. 37.9 × 3 = ?7 — what is the missing digit?
  38. 38.I thought of a number, added 5 and then doubled it. I got 46. What was my number?
  39. 39.1111 × 1111 =
  40. 40.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?

Answer key

  1. 9
  2. 22
  3. 8
  4. 45
  5. 861
  6. 90
  7. 3
  8. 8
  9. 7
  10. 152
  11. 54
  12. 80
  13. 64
  14. 36
  15. Monday
  16. 6
  17. 6
  18. Wednesday
  19. 56
  20. 98
  21. 26
  22. 90
  23. 555555555
  24. 5
  25. Thursday
  26. 5
  27. 4753
  28. 92
  29. 36
  30. Sunday
  31. 12
  32. 1000
  33. 11
  34. 1089
  35. 7
  36. 184
  37. 2
  38. 18
  39. 1234321
  40. 396

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