In each of the following number series, the wrong number is given, find out that number.
8.5, 9.5, 21, 66, 268, 1325
1
268
2
9.5
3
1325
4
66
5
21
In each of the following number series, the wrong number is given, find out that number.
8.5, 9.5, 21, 66, 268, 1325