2, 1, 2, 4, 4, 5, 6, 7, 8, 8, 10, 11, - Number Series - Series Completion - Verbal Reasoning ques

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. - 2, 1, 2, 4, 4, 5, 6, 7, 8, 8, 10, 11,

A. 9

B. 10

C. 11

D. 12

E. None of the above

Answer: B. 10

The given sequence is a combination of three series :
I. 1st, 4th, 7th, 10th, 13th term i.e. 2, 4, 6, 8, (....)
II. 2nd, 5th, 8th, 11th term i.e., 1, 4, 7, 10
III. 3rd, 6th, 9th, 12th terms i.e. 2, 5, 8, 11.
Clearly, I consists of consecutive even numbers.
So, the missing number is 10.

Posted in: Number Series - Series Completion - Verbal Reasoning