When the number 16 is doubled and the answer is then halved, the result is
(A) $2^{1}$
(B) $2^{2}$
(C) $2^{3}$
(D) $2^{4}$
(E) $2^{8}$
When the number 16 is doubled and the answer is then halved, the result is
(A) $2^{1}$
(B) $2^{2}$
(C) $2^{3}$
(D) $2^{4}$
(E) $2^{8}$

## Solution

When the number 16 is doubled the result is 32 .

When this answer is halved we get back to 16 , our starting point. Since $16=2^{4}$, the correct answer is $2^{4}$.

Answer: (D)