← Mixed trick challenge lesson New set →

Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 614 · 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 31 =
  2. 2.I thought of a number, multiplied it by 5 and added 6. I got 36. What was my number?
  3. 3.Magic trick! Think of 8. Double it, add 18, halve it, then take away 8. What number do you get?
  4. 4.14 × 4 =
  5. 5.Odd one out: which number is NOT in the 3 times table? (a) 18 (b) 15 (c) 9 (d) 25
  6. 6.Double 21 =
  7. 7.9 × 8 = ?2 — what is the missing digit?
  8. 8.Magic square (every row, column and diagonal has the same total): 17 10 15 | 12 14 16 | 13 18 ?. What is the missing number?
  9. 9.1 + 3 + 5 + … + 15 =
  10. 10.1234567 × 8 + 7 =
  11. 11.A girl is 6 years old and her brother is 2 years older. How old will her brother be in 6 years?
  12. 12.34 × 4 =
  13. 13.10 × 9 =
  14. 14.9 × 5 = 4? — what is the missing digit?
  15. 15.31 × ? = 3100
  16. 16.Magic square (every row, column and diagonal has the same total): 8 9 4 | 3 7 ? | 10 5 6. What is the missing number?
  17. 17.Magic square (every row, column and diagonal has the same total): 6 20 10 | 16 12 8 | ? 4 18. What is the missing number?
  18. 18.Magic square (every row, column and diagonal has the same total): 19 4 25 | 22 ? 10 | 7 28 13. What is the missing number?
  19. 19.I thought of a number, multiplied it by 2 and added 1. I got 13. What was my number?
  20. 20.9 × 5 =
  21. 21.5?7 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  22. 22.Magic trick! Think of 16. Double it, add 6, halve it, then take away 16. What number do you get?
  23. 23.53 × 4 =
  24. 24.40 × 4 =
  25. 25.1 + 2 + 3 + … + 44 =
  26. 26.Half of 158 =
  27. 27.24 × 4 =
  28. 28.If today is Friday, what day will it be after 13 days? (a) Friday (b) Thursday (c) Sunday (d) Wednesday
  29. 29.9 × 4 = 3? — what is the missing digit?
  30. 30.54 × 100 =
  31. 31.12 × 4 =
  32. 32.The ages of two twins add up to 10. How old is each twin?
  33. 33.43 × 4 =
  34. 34.Magic square (every row, column and diagonal has the same total): ? 34 19 | 28 22 16 | 25 10 31. What is the missing number?
  35. 35.I thought of a number, added 9 and then doubled it. I got 30. What was my number?
  36. 36.1 + 2 + 3 + … + 86 =
  37. 37.27 × 100 =
  38. 38.Magic trick! Think of 16. Double it, add 4, halve it, then take away 16. What number do you get?
  39. 39.Magic square (every row, column and diagonal has the same total): 16 14 24 | 26 18 10 | 12 ? 20. What is the missing number?
  40. 40.1 + 3 + 5 + … + 33 =

Answer key

  1. 62
  2. 6
  3. 9
  4. 56
  5. 25
  6. 42
  7. 7
  8. 11
  9. 64
  10. 9876543
  11. 14
  12. 136
  13. 90
  14. 5
  15. 100
  16. 11
  17. 14
  18. 16
  19. 6
  20. 45
  21. 6
  22. 3
  23. 212
  24. 160
  25. 990
  26. 79
  27. 96
  28. Thursday
  29. 6
  30. 5400
  31. 48
  32. 5
  33. 172
  34. 13
  35. 6
  36. 3741
  37. 2700
  38. 2
  39. 22
  40. 289

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