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# if x and y are +ve nos. is x>y? 1) x+y<1 2) y>x^2/2

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Current Student
Joined: 11 May 2008
Posts: 552
if x and y are +ve nos. is x>y? 1) x+y<1 2) y>x^2/2 [#permalink]

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06 Sep 2008, 21:11
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if x and y are +ve nos. is x>y?
1) x+yx^2/2.

--== Message from GMAT Club Team ==--

This is not a quality discussion. It has been retired.

If you would like to discuss this question please re-post 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.
SVP
Joined: 07 Nov 2007
Posts: 1756
Location: New York
Re: DS x and y [#permalink]

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06 Sep 2008, 22:12
1
KUDOS
arjtryarjtry wrote:
if x and y are +ve nos. is x>y?
1) x+y<1
2) y>x^2/2.

1)
x=1/4 and y=1/2
or
x=1/2 and y=1/4
not sufficient
2)2y>x^2
x=1/2 y=1/4 (x>y) satisfies the above equation
x=1/8 y=1/4 (x<y) satisfies the above equation.
not suffcient
combined

same as 2
not suffcient

E
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Manager
Joined: 03 Jun 2008
Posts: 131
Schools: ISB, Tuck, Michigan (Ross), Darden, MBS
Re: DS x and y [#permalink]

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07 Sep 2008, 00:12
x2suresh wrote:
arjtryarjtry wrote:
if x and y are +ve nos. is x>y?
1) x+y<1
2) y>x^2/2.

1)
x=1/4 and y=1/2
or
x=1/2 and y=1/4
not sufficient
2)2y>x^2
x=1/2 y=1/4 (x>y) satisfies the above equation
x=1/8 y=1/4 (x<y) satisfies the above equation.
not suffcient
combined

same as 2
not suffcient

E

I concur.
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Intern
Joined: 07 Sep 2008
Posts: 2
Re: DS x and y [#permalink]

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07 Sep 2008, 21:37
GMBA85 wrote:
x2suresh wrote:
arjtryarjtry wrote:
if x and y are +ve nos. is x>y?
1) x+y<1
2) y>x^2/2.

1)
x=1/4 and y=1/2
or
x=1/2 and y=1/4
not sufficient
2)2y>x^2
x=1/2 y=1/4 (x>y) satisfies the above equation
x=1/8 y=1/4 (x<y) satisfies the above equation.
not suffcient
combined

same as 2
not suffcient

E

I concur.

I believe the correct answer is C...

Here is Why. This is an YES or NO question basically.
The questions asks which of these following statements will answer no to the question.
is x>y

so x and y are any +ve #'s so lets say we choose x= 1000 and y=2
both of the answer will come up NO. the Same thing that the question is asking for. is X>Y the answer is NO... so its C
SVP
Joined: 17 Jun 2008
Posts: 1502
Re: DS x and y [#permalink]

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07 Sep 2008, 23:07
Quote:
I believe the correct answer is C...

Here is Why. This is an YES or NO question basically.
The questions asks which of these following statements will answer no to the question.
is x>y

so x and y are any +ve #'s so lets say we choose x= 1000 and y=2
both of the answer will come up NO. the Same thing that the question is asking for. is X>Y the answer is NO... so its C

With this logic, if you take stmt 1, it says x + y y. But, if x = 1/3 and y = 1/2, then x (x^2)/2 . The same is true for x = 1/3 and y = 1/2. Hence, insufficient.

Combining the two also will give the same result. Hence, E.

--== Message from GMAT Club Team ==--

This is not a quality discussion. It has been retired.

If you would like to discuss this question please re-post 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.
Re: DS x and y   [#permalink] 07 Sep 2008, 23:07
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