question_answer

In the following number series questions a series a given

First you have to find out the pattern given in the series then followed by this pattern you make new series whose first term is given.

The number series 1, 3, 9, 31, 129 follow a certain pattern then 5, ____, 17, -------1131. If 1131 is nth term then the value of n is-

A) 5

B) 4

C) 8

D) 10

E) None of these