Competition problem — Algebra — Maths Olympiad Prep

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Algebra Difficulty 1.8 Junior Find the answer

What is the expression $2^{3}+2^{2}+2^{1}$ equal to?

Your answer

A number or a short expression. Spacing and $ signs are ignored.

Solution

Since $2^{1}=2$ and $2^{2}=2 imes 2=4$ and $2^{3}=2 imes 2 imes 2=8$ , then $2^{3}+2^{2}+2^{1}=8+4+2=14$ .

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