Register    Login    Search    Rss Feeds

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


 Page 1 of 1 [ 4 posts ] 



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

integer n squares

Author Message
larhea
 Post subject: integer n squares
 Post Posted: Mon Nov 17, 2008 8:57 pm 
The sum of an integer and its square (that integer multiplied times itself) is 132. What could that integer be?
Top 
Guest
 Post subject:
 Post Posted: Mon Nov 17, 2008 10:09 pm 
Just try different numbers. 11 is the answer: 11+121=132
Top 
RR
 Post subject:
 Post Posted: Tue Nov 18, 2008 2:18 pm 
Let the integer be x
Therefore square of the integer is x^2

x^2 + x = 132
x^2 + x - 132 = 0
Solve for x
(x + 12)(x - 11) = 0
x = -12 or x = 11
Top 
RonPurewal
 Post subject:
 Post Posted: Sat Nov 29, 2008 8:12 am 
Offline
ManhattanGMAT Staff


Posts: 7146
"just try different numbers" is the more efficient way to go here, especially since it's not at all difficult to guess the size of the required number.

this is not a GMATPREP problem, so i've moved it to the general math folder.
Top 
Display posts from previous:  Sort by  
 
 Page 1 of 1 [ 4 posts ] 





Who is online

Users browsing this forum: No registered users and 0 guests

 
 

 
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: