Look at this series: 1.25, 7.5, ____, 270, 1620, ... What number should fill the blank?
Options:
(A) 50
(B) 65
(C) 45
(D) 55
(E) 40 Stream of consciousness:
This is a simple multiplication series. Each number is 6 times greater than the previous number.
Thus, the answer is (C).