Find the sum of A.P `2+4+6+8`

Find the sum of an A.P. of 17 terms, whose 3rd term is 8 and 8th term is 28.

Find the sum of the 4th term and 9th term of the A.P.. 3+8+13+18+.... .

Find the sum of 20 terms of the A.P.1,4,7,10..

The sum of 5 and 15 terms of an A.P. are equal. Find the sum of 20 terms of this A.P.

In an A.P., a=-6 and d = 2. Find the sum of its first 20 terms.

The first and last terms of an A.P. are - 7 and 233 and the sum of the A.P. is 9153. Find the number of terms in the A.P.:

Find the sum of the first 20 terms of the A.P .,5,8,11,14 ………..

Find the sum of the first 10 terms of the A.P. 6,4,2,…..

The sum of 4 th and 8 th terms of an A.P.is 24 and the sum of 6 th and 10 th terms is 44. Find the A.P.

The sum of first 8 terms and first 24 terms of an A.P. are equal. Find the sum of its 32 terms.