90, 180, 12, 50, 100, 200, , 3, 50, 4, 25, 2, 6, 30, 3 - Number Series - Series Completion - Verba

A. 150

B. 175

C. 225

D. 250

E. None of the above

Answer: A. 150

Clearly, 90 = 30 * 3, 180 = 6 * 30, 12 = 2 * 6, 50 = 25 * 2, 100 = 4 * 25, 200 = 50 * 4.
.'. Missing number = 3 * 50 = 150.

Posted in: Number Series - Series Completion - Verbal Reasoning