Question

Identify the term that will replace the ?

2, 1, 2, 4, 4, 5, 6, 7, 8, 8, 10, 11, ?

• A. 9
• B. 10
• C. 11
• D. 12

Answer 1

Answer: (B)

10

The given sequence is a combination of three series :
I. $1^{st}$, $4^{th}$, $7^{th}$, ${10}^{th}$, ${13}^{th}$ terms i.e.
2, 4, 6, 8, ?
II. $2^{nd}$, $5^{th}$, $8^{th}$, ${11}^{th}$, terms i.e.
1, 4, 7, 10
III. $3^{rd}$, $6^{th}$, $9^{th}$, ${12}^{th}$ terms i.e.
2, 5, 8, 11
Clearly, I consists of consecutive even numbers.
So, the missing terms is 10.
Hence,option B is the correct answer.