Complete the following series:
112.4, 100, 87.6, 75.2, ?

Correct option is C

Given:

112.4, 100, 87.6, 75.2, ?

Solution:

The common difference between each term:

112.4 – 100 = 12.4

100 – 87.6 = 12.4

87.6 – 75.2 = 12.4

Next number, 75.2 -x = 12.4

x = 75.2 – 12.4 = 62.8