Register    Login    Search    Rss Feeds

Forums Home » Ask An Instructor » GMAT Math » General Math Questions


 Page 1 of 1 [ 3 posts ] 



  Print view Print view Previous topic Previous topic | Next topic Next topic
 

Question from GMAT Prep

Author Message
jay.obaze
 Post subject: Question from GMAT Prep
 Post Posted: Tue Jan 03, 2012 9:45 pm 
Offline
Course Students


Posts: 1
Please can I get assistance with this question?

What's the greatest prime factor of 2^100 - 2^96?
Top 
ameya
 Post subject: Re: Question from GMAT Prep
 Post Posted: Wed Jan 04, 2012 6:42 am 
Offline
Students


Posts: 5
Take 2^96 common from 2^100 - 2^96
=> 2^96(2^4 - 1)
=> 2^96 x 16-1
It is clear that we have following primes 2, 3, 5 as 15 is part of the equation so 5 should be the answer.

Ameya
Top 
jnelson0612
 Post subject: Re: Question from GMAT Prep
 Post Posted: Wed Jan 11, 2012 10:02 pm 
Offline
ManhattanGMAT Staff


Posts: 1857
ameya wrote:
Take 2^96 common from 2^100 - 2^96
=> 2^96(2^4 - 1)
=> 2^96 x 16-1
It is clear that we have following primes 2, 3, 5 as 15 is part of the equation so 5 should be the answer.

Ameya


Very nice Ameya! Jay, let us know if you have further questions.

_________________
Jamie Nelson
ManhattanGMAT Instructor
Top 
Display posts from previous:  Sort by  
 
 Page 1 of 1 [ 3 posts ] 





Who is online

Users browsing this forum: No registered users and 1 guest

 
 

 
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
cron