Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 476 · 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.I thought of a number, multiplied it by 5 and added 2. I got 52. What was my number?
2. 2.If today is Saturday, what day was it 38 days ago? (a) Tuesday (b) Wednesday (c) Saturday (d) Thursday
3. 3.1 + 2 + 3 + … + 8 =
4. 4.21 × 4 =
5. 5.I thought of a number, added 2 and then doubled it. I got 10. What was my number?
6. 6.Half of 162 =
7. 7.1 + 2 + 3 + … + 27 =
8. 8.13 × 4 =
9. 9.49 × 4 =
10. 10.If today is Sunday, what day will it be after 49 days? (a) Sunday (b) Monday (c) Saturday (d) Wednesday
11. 11.Magic trick! Think of 7. Double it, add 12, halve it, then take away 7. What number do you get?
12. 12.The 1st of a month is a Tuesday. What day is the 25th of the same month? (a) Thursday (b) Friday (c) Saturday (d) Monday
13. 13.9 × 10 = ?0 — what is the missing digit?
14. 14.If today is Tuesday, what day will it be after 37 days? (a) Thursday (b) Wednesday (c) Sunday (d) Friday
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
16. 16.58 × 4 =
17. 17.4 × 9 =
18. 18.Magic square (every row, column and diagonal has the same total): ? 15 8 | 9 11 13 | 14 7 12. What is the missing number?
19. 19.Odd one out: which number is NOT in the 8 times table? (a) 48 (b) 32 (c) 35 (d) 24
20. 20.Magic square (every row, column and diagonal has the same total): ? 2 9 | 8 6 4 | 3 10 5. What is the missing number?
21. 21.16 × 1000 =
22. 22.If today is Sunday, what day was it 9 days ago? (a) Friday (b) Saturday (c) Thursday (d) Monday
23. 23.Magic trick! Think of 18. Double it, add 4, halve it, then take away 18. What number do you get?
24. 24.Take 27 and take away the sum of its digits. What do you get?
25. 25.The 8th of a month is a Tuesday. What day is the 22nd of the same month? (a) Tuesday (b) Friday (c) Monday (d) Wednesday
26. 26.Take 125. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.A girl is 5 years old and her brother is 3 years older. How old will her brother be in 3 years?
28. 28.107 × 10 =
29. 29.9 × 5 =
30. 30.Take 36 and take away the sum of its digits. What do you get?
31. 31.2 × 9 =
32. 32.What comes next? 3, 6, 12, 24, ? (a) 49 (b) 48 (c) 42 (d) 36
33. 33.1 + 2 + 3 + … + 43 =
34. 34.198 × 10 =
35. 35.16 × 4 =
36. 36.Take 53 and take away the sum of its digits. What do you get?
37. 37.1 + 2 + 3 + … + 39 =
38. 38.What comes next? 11, 18, 25, 32, ? (a) 39 (b) 32 (c) 46 (d) 40
39. 39.Magic square (every row, column and diagonal has the same total): 11 4 9 | 6 8 10 | ? 12 5. What is the missing number?
40. 40.37 × 12 =

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