GMATD11 wrote:

From B and E whts wrong with E

Just follow the rules of exponents. Answer will follow.

Cube root is the power of 1/3. Square root is the power of 1/2

\(n^{\frac{1}{3}}*n^{\frac{1}{2}} = \frac{n}{2}\)

You need to find n. So bring all n's together on one side of the equation and everything else on the other side.

Adding the exponents, \(n^{\frac{5}{6}} = \frac{n}{2}\)

Clubbing n's together, \(2 = n^{1-\frac{5}{6}}\)

\(n = 2^6 = 64\)

Hence it cannot be 729. If in the question, rather than half, we had a third, answer would have been 729.

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Karishma

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