8, 5, 6, 15, 52.5

Direction: Find out the wrong number in the following number series.                                    

Q. 8, 5, 6, 15, 52.5                                                         

A.15                                                      

B.52.5                                                   

C.5                                                         

D.8                                                        

E. None of these

Sol:

8 * 0.5 = 4

4 * 1.5 = 6

6 * 2.5 = 15

15 * 3.5 = 52.5