Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 219 · 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): 17 3 13 | 7 11 15 | ? 19 5. What is the missing number?
2. 2.The 3rd of a month is a Saturday. What day is the 28th of the same month? (a) Saturday (b) Thursday (c) Tuesday (d) Wednesday
3. 3.27 × 10 =
4. 4.Magic square (every row, column and diagonal has the same total): 31 16 19 | 10 22 34 | ? 28 13. What is the missing number?
5. 5.10 × 9 =
6. 6.9 × 6 =
7. 7.12345 × 8 + 5 =
8. 8.9 × 10 = 9? — what is the missing digit?
9. 9.1 + 3 + 5 + … + 19 =
10. 10.1 + 2 + 3 + … + 49 =
11. 11.690 × 10 =
12. 12.53 × 4 =
13. 13.If today is Saturday, what day will it be after 32 days? (a) Saturday (b) Thursday (c) Tuesday (d) Wednesday
14. 14.A girl is 5 years old and her brother is 2 years older. How old will her brother be in 3 years?
15. 15.33 × 100 =
16. 16.Double 22 =
17. 17.Take 68 and take away the sum of its digits. What do you get?
18. 18.20 × 100 =
19. 19.41 × 4 =
20. 20.10 × 4 =
21. 21.The 8th of a month is a Saturday. What day is the 20th of the same month? (a) Wednesday (b) Thursday (c) Sunday (d) Friday
22. 22.Half of 182 =
23. 23.A father is 33 years old and his son is 8. How old was the father when the son was born?
24. 24.Magic square (every row, column and diagonal has the same total): 9 ? 13 | 19 15 11 | 17 7 21. What is the missing number?
25. 25.9 × 9 = 8? — what is the missing digit?
26. 26.9 × 9 =
27. 27.20 × ? = 2000
28. 28.1 + 2 + 3 + … + 13 =
29. 29.202 × 10 =
30. 30.A girl is 10 years old and her brother is 3 years older. How old will her brother be in 2 years?
31. 31.Magic square (every row, column and diagonal has the same total): 7 6 11 | ? 8 4 | 5 10 9. What is the missing number?
32. 32.1234567 × 9 + 8 =
33. 33.9 × 8 = 7? — what is the missing digit?
34. 34.What comes next? 4, 9, 16, 25, ? (a) 34 (b) 37 (c) 38 (d) 36
35. 35.9 × 6 = ?4 — what is the missing digit?
36. 36.56 × 4 =
37. 37.Do the 1089 trick with 367: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Double 15 =
39. 39.If today is Sunday, what day will it be after 60 days? (a) Sunday (b) Friday (c) Thursday (d) Wednesday
40. 40.1 + 2 + 3 + … + 20 =

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