A mirror is placed and which of the Answer Figures is

4       6         12      30        90         310

In each of the following number series, one term is wrong. Find the wrong term.

7, 14, 30, 63, 131, 266, 538

A-5,   A,   35,   52,  78,  115

Find the wrong number in the given number series.

4, 11, 25, 53, 109, 223, 445

12, 23, 35, 47, 59, 73

3    4    18     72     360      2160     

Find the wrong number in the given number series.

8.6, 11.3, 16.7, 24.2, 35.6, 49.1

Find the wrong number in the given number series.

21, 11, 12, 19, 41, 105

1, 4, 20, 126, 1026, 10170