Need help with gmat quant prep question!

BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

This topic has expert replies

Post new topic Post Reply

Previous Topic Next Topic

mbahereicome: Newbie | Next Rank: 10 Posts; Posts: 4; Joined: Thu Jul 22, 2010 12:15 pm

Need help with gmat quant prep question!

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!

Quote

Source: Beat The GMAT — Problem Solving | Thu Jul 22, 2010 1:14 pm

Stuart@KaplanGMAT: GMAT Instructor; Posts: 3225; Joined: Tue Jan 08, 2008 2:40 pm; Location: Toronto; Thanked: 1710 times; Followed by:614 members; GMAT Score:800

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