1. Find the sum of the first 10 terms of the A.P. 2, 5, 8, ...
2. Find the sum of the first 15 terms of the A.P. 3, 7, 11, ...
3. Find the sum of the first 20 terms of the A.P. 10, 7, 4, ...
4. Find the sum of the first 12 terms of the A.P. 5, 10, 15, ...
5. Find the sum of the first 18 terms of the A.P. 2, 9, 16, ...
6. Find the sum of the first 25 terms of the A.P. 1, 3, 5, ...
7. Find the sum of the first 30 terms of the A.P. 4, 9, 14, ...
8. Find the sum of the first 40 terms of the A.P. 2, 6, 10, ...
9. Find the sum of the first 50 terms of the A.P. 3, 8, 13, ...
10. Find the sum of the first 60 terms of the A.P. 10, 15, 20, ...
11. Find the sum of the first 70 terms of the A.P. 1, 4, 7, ...
12. Find the sum of the first 80 terms of the A.P. 2, 5, 8, ...
13. Find the sum of the first 90 terms of the A.P. 3, 6, 9, ...
14. Find the sum of the first 100 terms of the A.P. 5, 12, 19, ...
15. Find the sum of the first 110 terms of the A.P. 2, 7, 12, ...
16. Find the sum of the first 120 terms of the A.P. 1, 3, 5, ...
17. Find the sum of the first 130 terms of the A.P. 4, 9, 14, ...
18. Find the sum of the first 140 terms of the A.P. 2, 6, 10, ...
19. Find the sum of the first 150 terms of the A.P. 3, 8, 13, ...
20. Find the sum of the first 160 terms of the A.P. 10, 15, 20, ...
ANSWER KEY.
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