Find the sum of the A.P.
`8,12,16`......up to `25` terms.

(i) Find the number of terms in the A.P. 8, 12, 16, ........124 (ii) Find the number of terms in the A.P. 75, 70, 65, .....15

Find the 24th term of the A.P. 12,16,20,24,….

Find the 60^(th) term of the A.P. 8, 10, 12, ....., if it has a total of 60 terms and hence find the sum of its last 10 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 to 25 terms of the A.P. 5, 7, 9, 11, …

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

Let S_(1) be the sum of the first n terms of the A.P 8,12,16,... and let S_(2) be the sum of the first n terms of the A.P 17,19,21,... assume n!=0 then S_(1)=S_(2) for

Find the number of terms of the A.P.9,17,25,... whose sum is 636

If the sum of a certain number of terms of the A.P.25,22,19... is 116. Find the last term.

The n th term of a series in A.P. is an +b . Find the sum of the series up to nterms.