It is currently 23 Feb 2018, 02:47

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# DS: >?

Author Message
Senior Manager
Joined: 19 Mar 2008
Posts: 351

### Show Tags

30 Aug 2008, 00:32
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

### HideShow timer Statistics

This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Intern
Joined: 15 Aug 2008
Posts: 19

### Show Tags

30 Aug 2008, 01:31
from 1)
2x - 2y = 1, x-y = 1/2
x=1, y=1/2 both positive!
x=-1, y= - 1.5 both negative

from 2)
x/y > 1, both could be positive or negitive!
-2/-2
2/2

SVP
Joined: 28 Dec 2005
Posts: 1542

### Show Tags

30 Aug 2008, 05:52
i got C. Here's what I did :

from stat 1, you know x-y=1/2
from stat 2, you know that either both x and y are positive or both negative

now, plug in x=1/2 + y into stat 2 to get (1/2y + y) / y > 1 --> 1/2y +1 > 1 --> 1/2y >0

That means that 2y>0, and in turn y>0 ... if this is the case, for stat 2 to be true, x must be greater than 0 as well
Intern
Joined: 16 Feb 2006
Posts: 30
Location: ZURICH

### Show Tags

30 Aug 2008, 06:59
from 1)
2x - 2y = 1, x-y = 1/2
x=1, y=1/2 both positive!
x=-1, y= - 1.5 both negative

from 2)
x/y > 1, both could be positive or negitive!
-2/-2
2/2

Here we have according to 1)
x = 1 , y= 1/2
then x/y = 2 > 1
but if x= -1 , y= -1.5
then x/y = 2/3 < 1 not satisfied

hence x and y are both positive

ans is C
_________________

TRY N TRY UNTIL U SUCCEED

SVP
Joined: 07 Nov 2007
Posts: 1789
Location: New York

### Show Tags

30 Aug 2008, 07:07
I will go with C aswell

1) 2x-2y=1
2) x/y>1

x/y >1 --> means x and y have same sign and |x|>|y|

when both are +ve x>y
2x-2y=1 (true)

when both are -ve |x|>|y|
2x-2y=1 (always false)

So X and Y must be positive
_________________

Smiling wins more friends than frowning

Senior Manager
Joined: 19 Mar 2008
Posts: 351

### Show Tags

30 Aug 2008, 18:52
OA is C

U guys all always get 51 is GMATPrep? : )
Re: DS: >?   [#permalink] 30 Aug 2008, 18:52
Display posts from previous: Sort by