A G.P. consists of an even number of terms. If the sum of all the terms is 5 times the sum of the terms occupying odd places, then the common ratio will be equal to
4
Let there be 2n terms in the given G.P. with first term a and the common ratio r.
Then, a(r2n−1)(r−1)=5a(r2n−1)(r2−1)⇒r+1=5⇒r=4.