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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 132 · 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. 1.154? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  2. 2.10 × 4 =
  3. 3.If today is Monday, what day was it 14 days ago? (a) Thursday (b) Sunday (c) Monday (d) Tuesday
  4. 4.What comes next? 4, 8, 16, 32, ? (a) 56 (b) 65 (c) 64 (d) 48
  5. 5.The ages of two twins add up to 10. How old is each twin?
  6. 6.9 × 8 = 7? — what is the missing digit?
  7. 7.37 × 27 =
  8. 8.9 × 2 =
  9. 9.What comes next? 16, 24, 32, 40, ? (a) 56 (b) 48 (c) 40 (d) 49
  10. 10.50 × 1000 =
  11. 11.Magic square (every row, column and diagonal has the same total): 24 27 12 | ? 21 33 | 30 15 18. What is the missing number?
  12. 12.9 × 2 = ?8 — what is the missing digit?
  13. 13.48 × 4 =
  14. 14.14 × 4 =
  15. 15.Take 410. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  16. 16.Odd one out: which number is NOT in the 8 times table? (a) 78 (b) 56 (c) 40 (d) 16
  17. 17.Half of 126 =
  18. 18.12345679 × 72 =
  19. 19.36 × 4 =
  20. 20.I thought of a number, added 5 and then doubled it. I got 36. What was my number?
  21. 21.A girl is 5 years old and her brother is 6 years older. How old will her brother be in 6 years?
  22. 22.What comes next? 6, 11, 16, 21, ? (a) 26 (b) 27 (c) 31 (d) 21
  23. 23.The ages of two twins add up to 14. How old is each twin?
  24. 24.8 × 9 =
  25. 25.Half of 96 =
  26. 26.9 × 4 = 3? — what is the missing digit?
  27. 27.693 + 396 =
  28. 28.I thought of a number, multiplied it by 2 and added 1. I got 19. What was my number?
  29. 29.9 × 9 =
  30. 30.1234 × 9 + 5 =
  31. 31.33?7 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  32. 32.9 × 10 =
  33. 33.Double 19 =
  34. 34.If today is Thursday, what day was it 41 days ago? (a) Monday (b) Thursday (c) Friday (d) Saturday
  35. 35.1 + 2 + 3 + … + 93 =
  36. 36.111 × 111 =
  37. 37.If today is Wednesday, what day was it 44 days ago? (a) Sunday (b) Tuesday (c) Thursday (d) Monday
  38. 38.37 × 3 =
  39. 39.Magic square (every row, column and diagonal has the same total): 2 7 6 | 9 5 1 | ? 3 8. What is the missing number?
  40. 40.9 × 3 =

Answer key

  1. 8
  2. 40
  3. Monday
  4. 64
  5. 5
  6. 2
  7. 999
  8. 18
  9. 48
  10. 50000
  11. 9
  12. 1
  13. 192
  14. 56
  15. 396
  16. 78
  17. 63
  18. 888888888
  19. 144
  20. 13
  21. 17
  22. 26
  23. 7
  24. 72
  25. 48
  26. 6
  27. 1089
  28. 9
  29. 81
  30. 11111
  31. 5
  32. 90
  33. 38
  34. Friday
  35. 4371
  36. 12321
  37. Monday
  38. 111
  39. 4
  40. 27

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