Number Series - Verbal and Reasoning

Directions to SolveLook carefully for the pattern, and then choose which pair of numbers comes next.
Q1:

Look at this series: (1/9), (1/3), 1, ____ , 9, ... What number should fill the blank?

A (2/3)

B 3

C 6

D 27

ANS:B - 3

This is a multiplication series; each number is 3 times the previous number.