What is the value of x ?

Ian Stewart: GMAT Instructor; Posts: 2621; Joined: Mon Jun 02, 2008 3:17 am; Location: Montreal; Thanked: 1090 times; Followed by:355 members; GMAT Score:780

Re: What is the value of x ?

by Ian Stewart » Tue Sep 08, 2009 7:13 am

netcaesar wrote:What is the value of x?
(1) x^2 + y^2 = 25
(2) xy = 12

OA is C

Even using both statements we could have that x = 3 and y = 4, x = 4 and y = 3, x = -4 and y = -3 or x = -3 and y = -4. The answer is E.

For online GMAT math tutoring, or to buy my higher-level Quant books and problem sets, contact me at ianstewartgmat at gmail.com

ianstewartgmat.com

Quote

g1988enator: Newbie | Next Rank: 10 Posts; Posts: 9; Joined: Fri Sep 11, 2009 10:56 am; Location: delhi

by g1988enator » Fri Sep 11, 2009 11:03 am

just put the value of y in x and solve it
it's ans will be -3 and -4

Quote

Post new topic Post Reply

• Page 1 of 1

5/5

5 Star (486 Reviews)

"Target Test Prep is the closest to the official version of the GMAT exam, about 99% accuracy in terms of the quality and quantity of information. The course has excellently created singular sets of focused lessons and tests for every possible topic that one could come across in the official GMAT exam."

"The TTP course maximizes the efficiency of the time you spend studying. It will take time and effort but I could almost guarantee that if you complete the course exactly as it is laid out you will get an amazing score. They also have a very responsive team willing to help with any questions you might have."

"TTP has two things that I think no other test prep company offers: A teaching approach that reinforces understanding and an attitude that will give you the mental preparedness needed to succeed on the test. TTP gives you a deep understanding of the concept you need to know while teaching you how to think."

Write a Review