My Math Forum Fractions 64(2/3)

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 May 3rd, 2017, 12:36 PM #1 Senior Member   Joined: Aug 2014 From: Mars Posts: 101 Thanks: 9 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.
 May 3rd, 2017, 12:37 PM #2 Senior Member   Joined: Aug 2012 Posts: 1,921 Thanks: 534 If you read that as $64^{\frac{2}{3}}$ the answer is $16$. Thanks from Opposite
 May 3rd, 2017, 12:38 PM #3 Senior Member   Joined: Aug 2014 From: Mars Posts: 101 Thanks: 9 Why? And yes that is the equation. $64^{\frac{2}{3}}$ Last edited by Opposite; May 3rd, 2017 at 12:43 PM.
 May 3rd, 2017, 12:51 PM #4 Senior Member   Joined: Aug 2014 From: Mars Posts: 101 Thanks: 9 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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