1. Find the nth term of an A.P.
2. Find the sum of the first n terms of an A.P.
3. Find the sum of the first n odd numbers.
4. Find the sum of the first n even numbers.
5. If the nth term of an A.P. is given, find the sum of the first n terms.
6. If the sum of the first n terms of an A.P. is given, find the nth term.
7. Find the sum of the squares of the first n natural numbers.
8. Find the sum of the cubes of the first n natural numbers.
9. Find the sum of the first n terms of an A.P. whose common difference is d.
10. Find the sum of the first n terms of an A.P. whose first term is a and common difference is d.
11. If the sum of the first n terms of an A.P. is given, find the common difference.
12. If the nth term of an A.P. is given, find the common difference.
13. Find the sum of the first n terms of a decreasing A.P.
14. Find the sum of the first n terms of an A.P. whose first term is a and nth term is bn.
15. If the sum of the first n terms of an A.P. is given, find the first term.
16. Find the sum of the first n terms of an A.P. whose common difference is -d.
17. Find the sum of the first n terms of an A.P. whose first term is -a and common difference is d.
18. If the nth term of an A.P. is given, find the sum of the first n terms in terms of a and d.
19. Find the sum of the first n terms of an A.P. whose common difference is 2d.
20. Find the sum of the first n terms of an A.P. whose first term is 2a and common difference is d.
ANSWER KEY.
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