1) If $\sqrt{2^{n}}=64$ then the value of n is: A) 2 B) 4 C) 6 D) 12 Answer: Option DExplanation:$\sqrt{2^{n}}=64$ $\Leftrightarrow \left(2^{n}\right)^{\frac{1}{2}}$ $=2^{6}$ $\Leftrightarrow 2^{\frac{n}{2}}=2^{6}$ $\Leftrightarrow \frac{n}{2}=6$ $\Leftrightarrow n=12$
