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# Is x > y ?

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Intern
Joined: 16 Feb 2010
Posts: 28
Followers: 0

Kudos [?]: 8 [0], given: 0

Is x > y ? [#permalink]

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01 May 2010, 07:25
1
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Difficulty:

55% (hard)

Question Stats:

43% (02:17) correct 57% (00:51) wrong based on 20 sessions

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Is x > y ?

(1) x + y > 0
(2) x^2 – y^2 > 0
[Reveal] Spoiler: OA
Senior Manager
Joined: 30 Aug 2009
Posts: 286
Location: India
Concentration: General Management
Followers: 3

Kudos [?]: 154 [0], given: 5

Re: Is x > y ? [#permalink]

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01 May 2010, 09:02
poohv005 wrote:
Is x >y ?
(1) x + y > 0
(2) x^2–y^2> 0

stmnt1 - x= 2 y = 0 then x + y > 0 and x>y
x= 1 and y =2 then x + y > 0 and x<y hence insuff

stmnt2 - x= 2 and y = 0 then x^2–y^2> 0 and x>y
x= -5 and y = 4 then x^2–y^2> 0 but x<y hence insuff

taking both together we have x + y > 0 and x^2–y^2> 0
==> x^2–y^2> 0 = (x+y)(x-y) > 0
==> we have (x+y) is >0 so x-y>0 or x>y. hence C
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Re: Is x > y ? [#permalink]

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14 Sep 2016, 10:33
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Re: Is x > y ?   [#permalink] 14 Sep 2016, 10:33
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