The ratio of sum of first three terms of G.P. to the sum of first six terms is `64:91` ,the common ratio of G.

The ratio of the sum of first three terms to the sum of first six terms is 125 : 152. Find the common ratio of G.P.

If the ratio fo the sum of first three terms of a GP to the sum of first six terms is 448 : 455 , then find the common ratio.

The ratio of the sum of first three terms is to that of first 6 terms of a G.P.is 1:12. Find the common ratio.

The sum of first three terms of a G.P. is (1)/(8) of the sum of the next three terms. Find the common ratio of G.P.

The sum of first 6 terms of a G.P. is nine times the sum of the first 3 terms. Find the common ratio.

The sum of first 12 terms of a G.P. is five times the sum of the first 6 terms. Find the common ratio.

If the sum of first 10 terms is 33 times the sum of first 5 terms of G.P. find the common ratio.

The sum of first three terms of a G.P. is 21 and sum of their squares is 189. Find the common ratio :

The sum of the first four terms of a geometric series is 520. The sum of the first five terms is 844. The sum of the first six terms is 1330. (a) Find the common ratio of the geometric progression.(b) Find the sum of the first two terms.