In each of the following number series, the wrong number is given, find out that number.
6, 4, 5, 8.5, 18, 55, 139
1
4
2
5
3
8.5
4
55
5
18
In each of the following number series, the wrong number is given, find out that number.
6, 4, 5, 8.5, 18, 55, 139