Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 618 · 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.Take 274. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.1 + 2 + 3 + … + 21 =
3. 3.792 + 297 =
4. 4.12 × 9 + 3 =
5. 5.9 × 10 =
6. 6.9 × 3 = 2? — what is the missing digit?
7. 7.Odd one out: which number is NOT in the 8 times table? (a) 27 (b) 56 (c) 24 (d) 48
8. 8.8 × ? = 8000
9. 9.9 × 4 = ?6 — what is the missing digit?
10. 10.Do the 1089 trick with 907: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.If today is Sunday, what day will it be after 55 days? (a) Saturday (b) Sunday (c) Friday (d) Tuesday
12. 12.What comes next? 3, 6, 12, 24, ? (a) 48 (b) 36 (c) 42 (d) 49
13. 13.Odd one out: which number is NOT in the 5 times table? (a) 25 (b) 20 (c) 26 (d) 40
14. 14.Magic trick! Think of 18. Double it, add 16, halve it, then take away 18. What number do you get?
15. 15.Take 214. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.The 5th of a month is a Wednesday. What day is the 13th of the same month? (a) Friday (b) Wednesday (c) Sunday (d) Thursday
17. 17.12345 × 9 + 6 =
18. 18.Half of 162 =
19. 19.The 3rd of a month is a Wednesday. What day is the 11th of the same month? (a) Sunday (b) Friday (c) Wednesday (d) Thursday
20. 20.9 × 2 =
21. 21.29 × 4 =
22. 22.Magic square (every row, column and diagonal has the same total): 12 ? 20 | 22 14 6 | 8 18 16. What is the missing number?
23. 23.Take 672. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Magic square (every row, column and diagonal has the same total): 10 24 14 | 20 16 12 | 18 ? 22. What is the missing number?
25. 25.4 × 9 =
26. 26.What comes next? 2, 4, 8, 16, ? (a) 33 (b) 28 (c) 32 (d) 24
27. 27.46 × 100 =
28. 28.Magic square (every row, column and diagonal has the same total): 13 12 17 | 18 ? 10 | 11 16 15. What is the missing number?
29. 29.43 × 4 =
30. 30.9 × 3 =
31. 31.In 2 years a boy will be 11 years old. How old was he 3 years ago?
32. 32.Do the 1089 trick with 269: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.The ages of two twins add up to 28. How old is each twin?
34. 34.21 × ? = 21000
35. 35.6 × 9 =
36. 36.111111 × 111111 =
37. 37.9 × 8 = ?2 — what is the missing digit?
38. 38.900 × 10 =
39. 39.9 × 7 =
40. 40.15 × 4 =

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