Mathematics Quizzes Number Series Completion

Directions:
In following question, a number series is given with one term missing. Choose the correct alternative that will same pattern and fill in the blank spaces.

Question:
12, 32, 72, 152,

Option A):
613
Option B):
325
Option C):
312
Option D):
515

Correct Answer is Option C):
312

Explanation:
The pattern is + 20, + 40, + 80,...
.'. Missing number = 152 + 160 = 312.