Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 1 · 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. 1.797 × 10 =
2. 2.Magic square (every row, column and diagonal has the same total): ? 29 8 | 11 17 23 | 26 5 20. What is the missing number?
3. 3.37 × 12 =
4. 4.If today is Wednesday, what day will it be after 32 days? (a) Wednesday (b) Monday (c) Saturday (d) Sunday
5. 5.12345679 × 27 =
6. 6.What comes next? 20, 29, 38, 47, ? (a) 47 (b) 57 (c) 65 (d) 56
7. 7.Odd one out: which number is NOT in the 9 times table? (a) 18 (b) 54 (c) 27 (d) 52
8. 8.1 + 2 + 3 + … + 43 =
9. 9.7 × 9 =
10. 10.If today is Sunday, what day was it 54 days ago? (a) Friday (b) Wednesday (c) Tuesday (d) Monday
11. 11.Half of 32 =
12. 12.9 × 2 = 1? — what is the missing digit?
13. 13.9 × 9 =
14. 14.17 × 4 =
15. 15.30 × 4 =
16. 16.A father is 32 years old and his son is 11. How old was the father when the son was born?
17. 17.Do the 1089 trick with 874: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.What comes next? 7, 14, 21, 28, ? (a) 42 (b) 28 (c) 35 (d) 36
19. 19.If today is Friday, what day will it be after 30 days? (a) Sunday (b) Wednesday (c) Monday (d) Saturday
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
21. 21.Do the 1089 trick with 670: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.I thought of a number, multiplied it by 5 and added 6. I got 71. What was my number?
23. 23.111111 × 111111 =
24. 24.37 × 9 =
25. 25.Magic trick! Think of 2. Double it, add 10, halve it, then take away 2. What number do you get?
26. 26.41 × 4 =
27. 27.9 × 8 = ?2 — what is the missing digit?
28. 28.12345 × 9 + 6 =
29. 29.1 + 2 + 3 + … + 49 =
30. 30.58 × 4 =
31. 31.9 × 5 = 4? — what is the missing digit?
32. 32.58?7 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
33. 33.22 × 4 =
34. 34.If today is Thursday, what day will it be after 37 days? (a) Tuesday (b) Friday (c) Saturday (d) Sunday
35. 35.9 × 2 =
36. 36.9 × 9 = ?1 — what is the missing digit?
37. 37.Magic square (every row, column and diagonal has the same total): 2 ? 4 | 7 5 3 | 6 1 8. What is the missing number?
38. 38.15? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
39. 39.Do the 1089 trick with 914: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.297 + 792 =

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