24, 60, 120, 210, - Number Series - Series Completion - Verbal Reasoning question

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. - 24, 60, 120, 210,

A. 300

B. 336

C. 420

D. 525

E. None of the above

Answer: B. 336

The pattern is+ 36, + 60, + 90, ....
i.e., + [ 6 * (6 + 0) ], + [ 6 * (6 + 4) ], + [ 6 * (6 + 9) ],.....
.'. Missng number = 210 + [ 6 * (6 + 15)] = 210 + 126 = 336.

Posted in: Number Series - Series Completion - Verbal Reasoning