Qs : GMAT Quantitative Section

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Qs [#permalink]

20 Oct 2008, 09:05

Last edited by study on 20 Oct 2008, 09:42, edited 1 time in total.

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Re: Qs [#permalink]

20 Oct 2008, 09:14

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]

20 Oct 2008, 09:46

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]

20 Oct 2008, 10:40

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

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Re: Qs [#permalink]

20 Oct 2008, 10:43

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]

20 Oct 2008, 14:27

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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Its Now Or Never

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Re: Qs [#permalink]

20 Oct 2008, 21:54

OA is C - thanks all for the explanation

Re: Qs [#permalink] 20 Oct 2008, 21:54

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