If $4^{n}=64^{2}$, then $n$ equals
(A) 3
(B) 5
(C) 6
(D) 8
(E) 12
We note that $64=4 \times 4 \times 4$.

Thus, $64^{2}=64 \times 64=4 \times 4 \times 4 \times 4 \times 4 \times 4$.

Since $4^{n}=64^{2}$, then $4^{n}=4 \times 4 \times 4 \times 4 \times 4 \times 4$ and so $n=6$.

ANswer: (C)