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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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Joined: 11 May 2008
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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+y<1
2) y>x^2/2.

Kudos [?]: 222 [0], given: 0

SVP
Joined: 07 Nov 2007
Posts: 1792

Kudos [?]: 1058 [1], given: 5

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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Kudos [?]: 1058 [1], given: 5

Manager
Joined: 03 Jun 2008
Posts: 133

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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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Kudos [?]: 45 [0], given: 0

Intern
Joined: 07 Sep 2008
Posts: 2

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

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

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

SVP
Joined: 17 Jun 2008
Posts: 1535

Kudos [?]: 279 [0], given: 0

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 < 1. Now, if x is 1/2 and y is 1/3 then x > y. But, if x = 1/3 and y = 1/2, then x < y. Thus, stmt 1 is insufficient.

Similarly, for stmt 2, if x = 1/2 and y = 1/3 then y > (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.

Kudos [?]: 279 [0], given: 0

Re: DS x and y   [#permalink] 07 Sep 2008, 23:07
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