The denominator of the seventh term is

A.] 125

B.] 216

C.] 343

D.] 513

Answer: option C) 343

Justification:

The sequence of the denominators is:

term denominator

1 1 = 1^3

2 8 = 2^3

3 27 = 3^3

4 64 = 4^3

5 5^3 = 125

6 6^3 = 216

7 7^3 = 343

And that is the term searched. So, the answer is the option C) 343.