The expression $2^{3}+2^{2}+2^{1}$ is equal to
(A) 6
(B) 10
(C) 14
(D) 18
(E) 22
Since $2^{1}=2$ and $2^{2}=2 \times 2=4$ and $2^{3}=2 \times 2 \times 2=8$, then $2^{3}+2^{2}+2^{1}=8+4+2=14$.

ANSWER: (C)