Find all School-related info fast with the new School-Specific MBA Forum

It is currently 24 Oct 2014, 05:43

Close

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

OK, first post but (as all say) I have been reading for a

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
VP
VP
avatar
Joined: 11 Dec 2006
Posts: 1430
Location: New York, NY
Schools: NYU Stern 2009
Followers: 38

Kudos [?]: 219 [0], given: 6

OK, first post but (as all say) I have been reading for a [#permalink] New post 07 Jan 2007, 14:01
OK, first post but (as all say) I have been reading for a while and it has been a valuable resource. Well, also slightly intimidating, as everyone seems to have committed a lot more prep time to the GMAT than I could manage.

Anyway, I have the test tomorrow, and on the practice test only got one question that I cannot resolve. It was the first one, I got it wrong, and I can't work out the underlying process to get the answer (all the others made fair sense).

Anyway

5^21 * 4^11 = 2 * 10^n

Find n. The answers available don't really matter, I would just really appreciate a full solution so I can see what rules I am missing.
Kaplan GMAT Prep Discount CodesKnewton GMAT Discount CodesManhattan GMAT Discount Codes
Senior Manager
Senior Manager
User avatar
Joined: 08 Aug 2006
Posts: 346
Location: San Francisco
Schools: Berkeley Haas
Followers: 3

Kudos [?]: 12 [0], given: 0

 [#permalink] New post 07 Jan 2007, 14:13
4^11 = (2^2)^11 = 2^22 = 2 * 2^21

5^21 * 2 * 2^21 = 2 * (5 * 2)^21 = 2 * 10^21

n = 21

peanuts ;)
VP
VP
avatar
Joined: 11 Dec 2006
Posts: 1430
Location: New York, NY
Schools: NYU Stern 2009
Followers: 38

Kudos [?]: 219 [0], given: 6

 [#permalink] New post 07 Jan 2007, 14:34
Thank you very much. I remember being poor at deconstructing exponentials about 12 years ago as well!

Makes good sense now - I will go back to swotting on my exponential rules.
Director
Director
User avatar
Joined: 26 Feb 2006
Posts: 907
Followers: 4

Kudos [?]: 44 [0], given: 0

 [#permalink] New post 07 Jan 2007, 16:51
braindancer wrote:
Never argue with an idiot. They drag you down to their level, then beat you with experience.


Very touchy. I like it.

But should not it be like this "Never argue with idiots. They drag you down to their level, then beat you with their experience."?
Senior Manager
Senior Manager
User avatar
Joined: 08 Aug 2006
Posts: 346
Location: San Francisco
Schools: Berkeley Haas
Followers: 3

Kudos [?]: 12 [0], given: 0

 [#permalink] New post 08 Jan 2007, 01:53
Well yes, I think you're right, but it's a quote so I left it that way :)

Don't overGMAT on everything - sometimes sentence correction is not really necessary :lol:
Manager
Manager
User avatar
Joined: 01 Dec 2006
Posts: 61
Followers: 1

Kudos [?]: 0 [0], given: 0

 [#permalink] New post 10 Jan 2007, 08:10
5^21*2^22=2*2^n*5^n
5^21*2^22=2^(n+1)5^n
n+1=22 n=21
  [#permalink] 10 Jan 2007, 08:10
    Similar topics Author Replies Last post
Similar
Topics:
I have generally read and heard people saying something zuperman 1 07 Mar 2011, 13:20
1 Experts publish their posts in the topic I need expert comments - If I say "having been" nusmavrik 4 07 Jun 2010, 21:32
Just saying hello (first post) gmatprep09 1 28 Apr 2009, 14:22
This is my first post. I have been around for some time Gmate 0 12 Mar 2006, 14:02
I guess the subject says it all, I have gotten used to not rianah100 1 10 Dec 2005, 06:48
Display posts from previous: Sort by

OK, first post but (as all say) I have been reading for a

  Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Privacy Policy| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group and phpBB SEO

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.