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Senior Manager
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Qs [#permalink] New post 20 Oct 2008, 08:05
..

Last edited by study on 20 Oct 2008, 08:42, edited 1 time in total.
SVP
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Re: Qs [#permalink] New post 20 Oct 2008, 08:14
study wrote:
Is x > y ?

(1) x2 > y2

(2) 3 x – 7 > – 3


from 1

x^2>y^2 , y can be a fraction > x that is a fraction too....insuff

from 2

3x>4

x>4/3.....insuff

from both

as long as x is not a fraction or -ve then suff

C
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Re: Qs [#permalink] New post 20 Oct 2008, 08:46
yezz wrote:
study wrote:
Is x > y ?

(1) x2 > y2

(2) 3 x – 7 > – 3


from 1

x^2>y^2 , y can be a fraction > x that is a fraction too....insuff

from 2

3x>4

x>4/3.....insuff

from both

as long as x is not a fraction or -ve then suff

C


have you done this question before,
the question gives statement 1: as x2>y2
why are you assuming it is x^2>y^2
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Re: Qs [#permalink] New post 20 Oct 2008, 09:40
ALD wrote:
yezz wrote:
study wrote:
Is x > y ?

(1) x2 > y2

(2) 3 x – 7 > – 3


from 1

x^2>y^2 , y can be a fraction > x that is a fraction too....insuff

from 2

3x>4

x>4/3.....insuff

from both

as long as x is not a fraction or -ve then suff

C


have you done this question before,
the question gives statement 1: as x2>y2
why are you assuming it is x^2>y^2


i just thought so :)
SVP
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Re: Qs [#permalink] New post 20 Oct 2008, 09:43
ALD wrote:
yezz wrote:
study wrote:
Is x > y ?

(1) x2 > y2

(2) 3 x – 7 > – 3


from 1

x^2>y^2 , y can be a fraction > x that is a fraction too....insuff

from 2

3x>4

x>4/3.....insuff

from both

as long as x is not a fraction or -ve then suff

C


have you done this question before,
the question gives statement 1: as x2>y2
why are you assuming it is x^2>y^2


Somehow, I feel there is typo in the question as x2>y2 does not make any sense.

Also, the statement in yezz's explanation of fraction is not true. So long x and y are positive (whether fraction or not), x^2 > y^2 will always imply x > y.
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Re: Qs [#permalink] New post 20 Oct 2008, 13:27
yezz wrote:
study wrote:
Is x > y ?

(1) x2 > y2

(2) 3 x – 7 > – 3


from 1

x^2>y^2 , y can be a fraction > x that is a fraction too....insuff

from 2

3x>4

x>4/3.....insuff

from both

as long as x is not a fraction or -ve then suff

C


x>y?
1)(x^2 - y^2) >0 => when x and y have differnt signs then inequality changes ,INSUFFI
2) x>4/3 does not help

Combine both :

since from 2 we know x>0 ,i.e,x>4/3 , x >y from 1)
being fraction or not does not matter since 1) has 21 possibilities y >0 or y<0 but whatever may be the case y<x .

IMO C
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Senior Manager
Senior Manager
Joined: 05 Oct 2008
Posts: 275
Followers: 3

Kudos [?]: 24 [0], given: 22

GMAT Tests User
Re: Qs [#permalink] New post 20 Oct 2008, 20:54
OA is C - thanks all for the explanation
Re: Qs   [#permalink] 20 Oct 2008, 20:54
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