In the following number series, a wrong number is given: 3, 5, 13, 49, 241, 1445, 10081The number is

The correct answer is (a) 1445.

The number series is 3, 5, 13, 49, 241, 1445, 10081. The numbers are generated by multiplying the previous number by 2 and adding 1. For example, 49 is 2 x 241 + 1.

1445 is not generated by this rule. It should be 2 x 241 = 482.

(b) 241 is generated by multiplying the previous number by 2 and adding 1.
(c) 49 is generated by multiplying the previous number by 2 and adding 1.
(d) 13 is generated by multiplying the previous number by 2 and adding 1.