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Need help with gmat quant prep question!

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by mbahereicome » Thu Jul 22, 2010 1:14 pm
if 5 to the power of 21 * 4 to the power of 11 = 2 * 10 to the power of n, what is the value of n.

I am interested in not only the answer but an explanation of how you solve this.

Thanks for the help!
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by Stuart@KaplanGMAT » Thu Jul 22, 2010 1:35 pm
mbahereicome wrote:if 5 to the power of 21 * 4 to the power of 11 = 2 * 10 to the power of n, what is the value of n.

I am interested in not only the answer but an explanation of how you solve this.

Thanks for the help!
Hi!

This question has been discussed quite a few times on BTG. I did a search on "5^21" and found a number of threads.

Here's one in which I comment:

https://www.beatthegmat.com/gmatprep-problem-t9491.html
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