Author 
Message 
Senior Manager
Joined: 29 Jan 2011
Posts: 315

Is x > y? [#permalink]
Show Tags
Updated on: 04 Dec 2017, 01:00
Question Stats:
71% (00:54) correct 29% (00:52) wrong based on 141 sessions
HideShow timer Statistics
Is x > y? (1) x^2 > y (2) x – y > 0 OPEN DISCUSSION OF THIS QUESTION IS HERE: isxy1x2y2xy215485.html== Message from GMAT Club Team == This is not a quality discussion. It has been retired. If you would like to discuss this question please repost it in the respective forum. Thank you! To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative  Verbal Please note  we may remove posts that do not follow our posting guidelines. Thank you.
Official Answer and Stats are available only to registered users. Register/ Login.
Originally posted by siddhans on 19 Jun 2011, 04:51.
Last edited by Bunuel on 04 Dec 2017, 01:00, edited 3 times in total.
Edited the question.



Current Student
Joined: 26 May 2005
Posts: 529

Re: Is x > y? [#permalink]
Show Tags
19 Jun 2011, 07:13
siddhans wrote: Is x > y?
(1) x2 > y
(2) x – y > 0 st1: x^2>y x can be positive or negative ex: (5)^2 > 6 but 5 is not > 6................. in sufficient st 2: x> y when Y is postive x> y example X = 6 y = 5 6>5 when y is negative x>y 6>(5) 6>5 ( we cant assume Y to be 7 ...) hence B



Senior Manager
Joined: 29 Jan 2011
Posts: 315

Re: Is x > y? [#permalink]
Show Tags
19 Jun 2011, 13:59
sudhir18n wrote: siddhans wrote: Is x > y?
(1) x2 > y
(2) x – y > 0 st1: x^2>y x can be positive or negative ex: (5)^2 > 6 but 5 is not > 6................. in sufficient st 2: x> y when Y is postive x> y example X = 6 y = 5 6>5 when y is negative x>y 6>(5) 6>5 ( we cant assume Y to be 7 ...) hence B I did not get it... St 2 : when Y is positive x >y ex. x=6 and you are taking y =5???? Also, when y is ve why are you writing x > y??? how does mod work in this case? if its given x > y???



Senior Manager
Joined: 29 Jan 2011
Posts: 315

Re: Is x > y? [#permalink]
Show Tags
20 Jun 2011, 22:34
Can someone please reply? Also, how can we assume x is positive in statement 2?



Retired Moderator
Joined: 16 Nov 2010
Posts: 1468
Location: United States (IN)
Concentration: Strategy, Technology

Re: Is x > y? [#permalink]
Show Tags
20 Jun 2011, 22:40
y is always positive, but y may or may not be positive. If y < 0, then y = y. Also, x > y means x is > a positive number, so x is always positive. Read this : mathabsolutevaluemodulus86462.html
_________________
Formula of Life > Achievement/Potential = k * Happiness (where k is a constant)
GMAT Club Premium Membership  big benefits and savings



Senior Manager
Joined: 29 Jan 2011
Posts: 315

Re: Is x > y? [#permalink]
Show Tags
20 Jun 2011, 23:21
subhashghosh wrote: y is always positive, but y may or may not be positive. If y < 0, then y = y. Also, x > y means x is > a positive number, so x is always positive. Read this : mathabsolutevaluemodulus86462.htmlOk got it ...but in sudhir's ex st 2: x> y when Y is postive x> y example X = 6 y = 5 6>5 when y is negative x>y 6>(5) 6>5 ( we cant assume Y to be 7 ...) How come he says Y is +ve and takes y =5??? Is there some error?



Current Student
Joined: 26 May 2005
Posts: 529

Re: Is x > y? [#permalink]
Show Tags
20 Jun 2011, 23:23
siddhans wrote: subhashghosh wrote: y is always positive, but y may or may not be positive. If y < 0, then y = y. Also, x > y means x is > a positive number, so x is always positive. Read this : mathabsolutevaluemodulus86462.htmlOk got it ...but in sudhir's ex st 2: x> y when Y is postive x> y example X = 6 y = 5 6>5 when y is negative x>y 6>(5) 6>5 ( we cant assume Y to be 7 ...) How come he says Y is +ve and takes y =5??? Is there some error?Yes there is an error Y has to be 5 and not 5



Manager
Joined: 07 Feb 2011
Posts: 99

Re: Is x > y? [#permalink]
Show Tags
Updated on: 13 Feb 2013, 09:50
Is x > y? (1) x^2 > y (2) x – y > 0 My understtanding: All statement 1 tells us for sure is x is not 0 Statement 2 we can break into two staments
x>y OR x>y
What I dont get is only one of those statements being true makes B the correct choice...so how is B the correct choice when there are two possibilities for a solution?
_________________
We appreciate your kudos'
Originally posted by manimgoindowndown on 13 Feb 2013, 09:42.
Last edited by Bunuel on 13 Feb 2013, 09:50, edited 1 time in total.
RENAMED THE TOPIC.



Manager
Joined: 04 Oct 2011
Posts: 200
Location: India
Concentration: Entrepreneurship, International Business
GPA: 3

Re: Is x > y? [#permalink]
Show Tags
13 Feb 2013, 09:58
manimgoindowndown wrote: Is x > y? (1) x^2 > y (2) x – y > 0 My understtanding: All statement 1 tells us for sure is x is not 0 Statement 2 we can break into two staments
x>y OR x>y
What I dont get is only one of those statements being true makes B the correct choice...so how is B the correct choice when there are two possibilities for a solution? Yes u got it right way! but u gotta complete it buddy ya definitely S1 is not sufficent But S2 is a trap. x>y OR x>y assume numbers for x and y in this case let x=4 and y=3 so 4>3 like wise x=4 and y=3 this also 4>3 So x>y always will be x>y Hope i helped u
_________________
GMAT  Practice, Patience, Persistence Kudos if u like



Verbal Forum Moderator
Joined: 10 Oct 2012
Posts: 619

Re: Is x > y? [#permalink]
Show Tags
15 Feb 2013, 02:35
From F.S 1, we can have x=5,y=3. Thus , x^2>y, but x<y. Hence the answer is NO. Now, for x=5,y=3, x^2>y and x>y. Here the answer is a YES. Thus not sufficient. Fro F.S 2, xmod(y)>0. Thus, x>mod(y). Whatever be the sign of y, x>y(always). Sufficient. B.
_________________
All that is equal and notDeep Dive Inequality
Hit and Trial for Integral Solutions



VP
Joined: 02 Jul 2012
Posts: 1193
Location: India
Concentration: Strategy
GPA: 3.8
WE: Engineering (Energy and Utilities)

Re: Is x > y? [#permalink]
Show Tags
15 Feb 2013, 03:16
manimgoindowndown wrote: Is x > y? (1) x^2 > y (2) x – y > 0 My understtanding: All statement 1 tells us for sure is x is not 0 Statement 2 we can break into two staments
x>y OR x>y
What I dont get is only one of those statements being true makes B the correct choice...so how is B the correct choice when there are two possibilities for a solution? From 2, we get that x  y is positive. Since y is postive, this means that x is also positive. So, if "y" is negative, it automatically means that x is greater than y. If "y" is positive, x  y still gives a postive number. Hence x is again greater than y. Answer is hence B.
_________________
Did you find this post helpful?... Please let me know through the Kudos button.
Thanks To The Almighty  My GMAT Debrief
GMAT Reading Comprehension: 7 Most Common Passage Types



Math Expert
Joined: 02 Sep 2009
Posts: 47019

Re: Is x > y? [#permalink]
Show Tags
04 Dec 2017, 00:59










