Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 962 · 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. 1.9 × 2 =
2. 2.Double 52 =
3. 3.1 + 3 + 5 + … + 11 =
4. 4.9 × 5 = 4? — what is the missing digit?
5. 5.4 × 9 =
6. 6.1111 × 1111 =
7. 7.You have 7 coins. Each coin is ₹1 or ₹2, and together they make ₹13. How many ₹2 coins do you have?
8. 8.Half of 172 =
9. 9.9 × 2 = ?8 — what is the missing digit?
10. 10.899 × 10 =
11. 11.Half of 52 =
12. 12.1 + 3 + 5 + … + 39 =
13. 13.594 + 495 =
14. 14.Magic square (every row, column and diagonal has the same total): ? 9 8 | 11 7 3 | 6 5 10. What is the missing number?
15. 15.1 + 3 + 5 + … + 17 =
16. 16.9 × 3 = 2? — what is the missing digit?
17. 17.11 × 11 =
18. 18.What comes next? 36, 49, 64, 81, ? (a) 101 (b) 98 (c) 102 (d) 100
19. 19.If today is Monday, what day was it 9 days ago? (a) Tuesday (b) Sunday (c) Friday (d) Saturday
20. 20.1 + 3 + 5 + … + 33 =
21. 21.9 × 5 =
22. 22.19 × 1000 =
23. 23.8 × 9 =
24. 24.Double 58 =
25. 25.Do the 1089 trick with 772: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Half of 32 =
27. 27.If today is Thursday, what day will it be after 56 days? (a) Thursday (b) Wednesday (c) Friday (d) Sunday
28. 28.9 × 10 =
29. 29.I thought of a number, multiplied it by 2 and added 5. I got 15. What was my number?
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
31. 31.I thought of a number, added 9 and then doubled it. I got 46. What was my number?
32. 32.9 × 8 = ?2 — what is the missing digit?
33. 33.Magic square (every row, column and diagonal has the same total): ? 7 22 | 13 19 25 | 16 31 10. What is the missing number?
34. 34.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
35. 35.Do the 1089 trick with 109: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 870: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.I thought of a number, added 5 and then doubled it. I got 48. What was my number?
39. 39.40 × 4 =
40. 40.What comes next? 2, 11, 20, 29, ? (a) 39 (b) 47 (c) 38 (d) 29

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