6) What is the value of the square of the square of the square of 8?
(A) $2^{8}$
$\begin{array}{ll}\text { (B) } 8^{4} & \text { (C) } 8^{6}\end{array}$
(D) $8^{8}$
(E) $2^{64}$.
6) The answer is $(\mathbf{D})$.

Indeed, $\left(\left(8^{2}\right)^{2}\right)^{2}=\left(8^{4}\right)^{2}=8^{8}$.