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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 440 · 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. 1.12 × 8 + 2 =
  2. 2.What comes next? 1, 2, 4, 8, ? (a) 17 (b) 14 (c) 12 (d) 16
  3. 3.1 + 2 + 3 + … + 27 =
  4. 4.Take 45 and take away the sum of its digits. What do you get?
  5. 5.111 × 111 =
  6. 6.What comes next? 4, 8, 16, 32, ? (a) 48 (b) 64 (c) 65 (d) 56
  7. 7.14 × 4 =
  8. 8.1 + 3 + 5 + … + 29 =
  9. 9.The 9th of a month is a Friday. What day is the 21st of the same month? (a) Thursday (b) Tuesday (c) Wednesday (d) Saturday
  10. 10.A father is 45 years old and his son is 7. How old was the father when the son was born?
  11. 11.13 × 4 =
  12. 12.I thought of a number, added 2 and then doubled it. I got 12. What was my number?
  13. 13.Double 67 =
  14. 14.Magic square (every row, column and diagonal has the same total): 12 11 16 | 17 13 9 | 10 ? 14. What is the missing number?
  15. 15.114 × 10 =
  16. 16.144? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  17. 17.9 × 2 = 1? — what is the missing digit?
  18. 18.What comes next? 3, 6, 12, 24, ? (a) 49 (b) 48 (c) 36 (d) 42
  19. 19.Magic square (every row, column and diagonal has the same total): 27 12 15 | 6 ? 30 | 21 24 9. What is the missing number?
  20. 20.I thought of a number, added 8 and then doubled it. I got 28. What was my number?
  21. 21.12 × 4 =
  22. 22.Magic square (every row, column and diagonal has the same total): 13 14 ? | 8 12 16 | 15 10 11. What is the missing number?
  23. 23.Double 82 =
  24. 24.39 × 100 =
  25. 25.43 × 4 =
  26. 26.Half of 164 =
  27. 27.37 × 3 =
  28. 28.Think of 15. Multiply it by 3, then add 4. What number do you end with?
  29. 29.Magic square (every row, column and diagonal has the same total): ? 16 11 | 10 14 18 | 17 12 13. What is the missing number?
  30. 30.A piggy bank has 12 coins of ₹5 and 9 coins of ₹2. How many rupees are in it?
  31. 31.Magic square (every row, column and diagonal has the same total): 15 16 11 | 10 14 18 | 17 12 ?. What is the missing number?
  32. 32.6 × 9 =
  33. 33.5?17 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  34. 34.A father is 31 years old and his son is 6. How old was the father when the son was born?
  35. 35.48 × ? = 48000
  36. 36.1 + 2 + 3 + … + 63 =
  37. 37.Magic square (every row, column and diagonal has the same total): 11 16 9 | 10 12 14 | 15 8 ?. What is the missing number?
  38. 38.1?10 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  39. 39.Magic square (every row, column and diagonal has the same total): 15 5 19 | 17 13 ? | 7 21 11. What is the missing number?
  40. 40.A father is 40 years old and his son is 12. How old was the father when the son was born?

Answer key

  1. 98
  2. 16
  3. 378
  4. 36
  5. 12321
  6. 64
  7. 56
  8. 225
  9. Wednesday
  10. 38
  11. 52
  12. 4
  13. 134
  14. 15
  15. 1140
  16. 9
  17. 8
  18. 48
  19. 18
  20. 6
  21. 48
  22. 9
  23. 164
  24. 3900
  25. 172
  26. 82
  27. 111
  28. 49
  29. 15
  30. 78
  31. 13
  32. 54
  33. 5
  34. 25
  35. 1000
  36. 2016
  37. 13
  38. 7
  39. 9
  40. 28

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