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May 3rd, 2017, 12:36 PM   #1
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Fractions 64(2/3)`

I had to do an accuplacer recently and a few questions stood out that I didn't understand. This was one of them.

64 $\displaystyle \frac{2}{3}$ and the options were 2,4, 8, 16, 32.

What math is this? It's not a standard fraction.

Last edited by skipjack; May 3rd, 2017 at 02:25 PM.
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May 3rd, 2017, 12:37 PM   #2
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If you read that as $64^{\frac{2}{3}}$ the answer is $16$.
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May 3rd, 2017, 12:38 PM   #3
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Why? And yes that is the equation. $64^{\frac{2}{3}}$

Last edited by Opposite; May 3rd, 2017 at 12:43 PM.
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May 3rd, 2017, 12:51 PM   #4
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Actually, I got it. The 3 is the index, like finding the square root, but with a 3. Then the two squares that number. Thank you.
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