Data Sufficiency

In a sequence of terms in which each term is three times the previous term, what is the fourth term?

(1) The first term is 3.

(2) The second-to-last term is 3^10.

In a sequence of terms in which each term is three times the previous term, what is the fourth term? The series is of the form x, 3x, 3^2 * x ........3^(n-1) * x. The question can be rephrased to.
If x, 3x, 3^2 * x ........3^(n-1) * x is a series, what is the value of 27*x

(1) The first term is 3.

First term in the series = x = 3. Then 27x = 27*3 = 81> Statement 1 is sufficient to answer the question.

(2) The second-to-last term is 3^10.

3^(n-2) * x = 3^10. There are 2 variable n and x but just one equation. So, Statement 2 is Insufficient to answer the question.

IMO A