Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 314 · 40 questions

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.

1. 1.Magic square (every row, column and diagonal has the same total): 13 23 21 | 27 ? 11 | 17 15 25. What is the missing number?
2. 2.If today is Monday, what day was it 27 days ago? (a) Friday (b) Monday (c) Tuesday (d) Wednesday
3. 3.6 × 4 =
4. 4.Half of 82 =
5. 5.A father is 41 years old and his son is 7. How old was the father when the son was born?
6. 6.7 × 9 =
7. 7.57 × 4 =
8. 8.17 × 100 =
9. 9.Think of 14. Multiply it by 4, then add 8. What number do you end with?
10. 10.1 + 2 + 3 + … + 44 =
11. 11.Think of 14. Multiply it by 5, then add 4. What number do you end with?
12. 12.Double 51 =
13. 13.Half of 166 =
14. 14.Magic square (every row, column and diagonal has the same total): 15 25 11 | 13 17 21 | 23 ? 19. What is the missing number?
15. 15.The 9th of a month is a Monday. What day is the 21st of the same month? (a) Tuesday (b) Friday (c) Saturday (d) Sunday
16. 16.A father is 31 years old and his son is 10. How old was the father when the son was born?
17. 17.Double 31 =
18. 18.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 52 and take away the sum of its digits. What do you get?
20. 20.9 × 3 = ?7 — what is the missing digit?
21. 21.Take 22 and take away the sum of its digits. What do you get?
22. 22.7 × 4 =
23. 23.693 + 396 =
24. 24.Half of 68 =
25. 25.34 × 1000 =
26. 26.The ages of two twins add up to 24. How old is each twin?
27. 27.Magic square (every row, column and diagonal has the same total): 13 12 17 | 18 ? 10 | 11 16 15. What is the missing number?
28. 28.Magic square (every row, column and diagonal has the same total): 13 ? 11 | 8 10 12 | 9 14 7. What is the missing number?
29. 29.Magic square (every row, column and diagonal has the same total): ? 10 11 | 8 12 16 | 13 14 9. What is the missing number?
30. 30.1 + 2 + 3 + … + 67 =
31. 31.Double 95 =
32. 32.1 + 2 + 3 + … + 75 =
33. 33.1 + 3 + 5 + … + 17 =
34. 34.If today is Friday, what day will it be after 61 days? (a) Saturday (b) Thursday (c) Tuesday (d) Wednesday
35. 35.What comes next? 3, 6, 12, 24, ? (a) 48 (b) 36 (c) 49 (d) 42
36. 36.37 × 9 =
37. 37.What comes next? 5, 10, 20, 40, ? (a) 70 (b) 60 (c) 81 (d) 80
38. 38.12345679 × 54 =
39. 39.1 + 2 + 3 + … + 9 =
40. 40.9 × 2 = ?8 — what is the missing digit?

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