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

 It is currently 26 Mar 2015, 15:47

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

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

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

What is the value of xy? 1. y = x + 1 2. y = x^2 + 1

Author Message
TAGS:
Intern
Joined: 12 Nov 2009
Posts: 11
Followers: 0

Kudos [?]: 2 [0], given: 2

What is the value of xy? 1. y = x + 1 2. y = x^2 + 1 [#permalink]  04 Jan 2010, 00:37
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
Hi,

I have a doubt in one data sufficiency question of mba.com test. Can anyone please explain? The question is as follows.

What is the value of xy?
1. y = x + 1
2. y = x^2 + 1
Senior Manager
Joined: 30 Aug 2009
Posts: 290
Location: India
Concentration: General Management
Followers: 3

Kudos [?]: 102 [1] , given: 5

Re: Data Sufficiency Question (mba.com test) [#permalink]  04 Jan 2010, 07:18
1
KUDOS
gouribhalerao wrote:
Hi,

I have a doubt in one data sufficiency question of mba.com test. Can anyone please explain? The question is as follows.

What is the value of xy?
1. y = x + 1
2. y = x^2 + 1

stmnt1 - y = x+1 will not help us to get value of xy as we do not know the value of x. hence insuff
stmnt2 - y = x^2 + 1 same as 1. hence insuff

taking together we get x+ 1 = x^2 + 1 . we get x^2 = x . here x can be both 1 or 0
so we will get 2 different values for xy and even together both are not sufficient.

will go with E
Intern
Joined: 12 Nov 2009
Posts: 11
Followers: 0

Kudos [?]: 2 [0], given: 2

Re: Data Sufficiency Question (mba.com test) [#permalink]  04 Jan 2010, 07:40
That's right. Thanks.
While solving the exam, I thought that if I consider both statements together, then x^2 = x. Then dividing both sides by x, I can get x=1. But yes, when here x can either be 0 or 1 and that changes the answer.
Re: Data Sufficiency Question (mba.com test)   [#permalink] 04 Jan 2010, 07:40
Similar topics Replies Last post
Similar
Topics:
What is the value of x^2 + y^2 ? (1) x^2+ y^2 = 2xy + 1 (2) 4 05 Jun 2011, 08:16
What is the value of x^2 + y^2? 1) x^2 + y^2 = 2xy + 1 2) 6 24 Jul 2010, 07:50
What is the value of x^2 + y^2? (1) x^2 + y^2 = 2xy +1 (2) 1 28 Jan 2009, 10:57
1 If x and y are positive, what is the value of x-y? 1) (X^2 - 3 29 Dec 2008, 10:26
What is the value of X^2 -Y^2? 1. x+y=2x 2. x+y=0 I 4 17 Jul 2006, 20:59
Display posts from previous: Sort by