Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 844 · 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.A girl is 9 years old and her brother is 6 years older. How old will her brother be in 4 years?
2. 2.If today is Sunday, what day will it be after 62 days? (a) Tuesday (b) Saturday (c) Sunday (d) Friday
3. 3.Do the 1089 trick with 991: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.3 × 9 =
5. 5.23 × 4 =
6. 6.39 × 4 =
7. 7.12345679 × 18 =
8. 8.If today is Tuesday, what day was it 12 days ago? (a) Friday (b) Sunday (c) Wednesday (d) Thursday
9. 9.9 × 9 =
10. 10.Magic square (every row, column and diagonal has the same total): 11 ? 15 | 18 14 10 | 13 12 17. What is the missing number?
11. 11.7 × 9 =
12. 12.17 × 4 =
13. 13.65 × 100 =
14. 14.52 × ? = 5200
15. 15.75 × 100 =
16. 16.Magic square (every row, column and diagonal has the same total): 9 16 11 | ? 12 10 | 13 8 15. What is the missing number?
17. 17.111111 × 111111 =
18. 18.9 × 3 = 2? — what is the missing digit?
19. 19.42 × 4 =
20. 20.I thought of a number, multiplied it by 2 and added 2. I got 22. What was my number?
21. 21.25 × 1000 =
22. 22.What comes next? 5, 14, 23, 32, ? (a) 50 (b) 42 (c) 32 (d) 41
23. 23.54 × 4 =
24. 24.9 × 4 = 3? — what is the missing digit?
25. 25.?382 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
26. 26.72 × ? = 7200
27. 27.If today is Tuesday, what day will it be after 18 days? (a) Friday (b) Tuesday (c) Saturday (d) Sunday
28. 28.A piggy bank has 10 coins of ₹5 and 10 coins of ₹2. How many rupees are in it?
29. 29.A girl is 5 years old and her brother is 3 years older. How old will her brother be in 8 years?
30. 30.1 + 2 + 3 + … + 58 =
31. 31.32 × 1000 =
32. 32.Half of 148 =
33. 33.22 × 1000 =
34. 34.1 + 3 + 5 + … + 41 =
35. 35.33 × 1000 =
36. 36.1 + 2 + 3 + … + 52 =
37. 37.Do the 1089 trick with 710: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.26 × 4 =
39. 39.What comes next? 25, 36, 49, 64, ? (a) 81 (b) 83 (c) 82 (d) 79
40. 40.1 + 2 + 3 + … + 95 =

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