One term in the number series is wrong. Find out the wrong term. 6, 15, 35, 77, 165, 221

35
77
165
15

The correct answer is $\boxed{\text{C}}$.

The sequence is a simple addition series, with each term being the sum of the previous two terms. Therefore, the sequence should be $6, 15, 35, 77, 122, 221$.

The term $165$ is incorrect because it is not the sum of the two previous terms. The sum of the previous two terms is $77 + 122 = 199$. Therefore, the term $165$ is out of place.

Exit mobile version