Check GMAT Club Decision Tracker for the Latest School Decision Releases https://gmatclub.com/AppTrack

 It is currently 22 May 2017, 15:28

### 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

# If x and y are integers and x>0, is y>0? 1) 7x-2y>0

Author Message
Senior Manager
Joined: 17 Aug 2005
Posts: 391
Location: Boston, MA
Followers: 2

Kudos [?]: 105 [0], given: 0

If x and y are integers and x>0, is y>0? 1) 7x-2y>0 [#permalink]

### Show Tags

05 Feb 2007, 18:43
1
This post was
BOOKMARKED
00:00

Difficulty:

(N/A)

Question Stats:

100% (00:00) correct 0% (00:00) wrong based on 1 sessions

### HideShow timer Statistics

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

If x and y are integers and x>0, is y>0?

1) 7x-2y>0

2) -y<x

Last edited by buckkitty on 06 Feb 2007, 09:38, edited 1 time in total.
Senior Manager
Joined: 04 Jan 2006
Posts: 279
Followers: 1

Kudos [?]: 38 [0], given: 0

Re: DS - Is y>0? [#permalink]

### Show Tags

05 Feb 2007, 18:55
buckkitty wrote:
If x and y are integers and x>0, is y>0?

1) 7x-2y>0

2) -y>x

Question: x and y are integers. x>0, y>0 ?

Info(1): 7x-2y>0
-2y>-7x
y<7x>x

Last edited by devilmirror on 05 Feb 2007, 19:06, edited 1 time in total.
Senior Manager
Joined: 04 Jan 2006
Posts: 279
Followers: 1

Kudos [?]: 38 [0], given: 0

Re: DS - Is y>0? [#permalink]

### Show Tags

05 Feb 2007, 19:05
devilmirror wrote:
Question: x and y are integers. x > 0, y > 0 ?

Info(1): 7x-2y>0
-2y>-7x
y<7x>x
y<x>0 or -x<0
we can conclude that y<-x<0
or y<0>0? The answer is NO. SUFF

Could anyone fix the bugs about inequality signs?
I do not want to type the answer all over again.
SVP
Joined: 01 May 2006
Posts: 1796
Followers: 9

Kudos [?]: 154 [0], given: 0

### Show Tags

06 Feb 2007, 00:05
(B) as well

I prefer the approach of XY plan uses.

Stat1
7x-2y>0
<=> y <7>0 and y>0), in cadran III (x<0 and y<0>0 and y<0> 0, we can be either in cadran I or IV. Thus, y <0> 0 (Fig1).

INSUFF.

Stat2
-y> x
<=> y < -x

Thus, we are below the line y = -x in the XY plan. We can be either in cadran II (x<0>0), in cadran III (x<0 and y<0>0 and y<0> 0, we are necesserary in the cadran IV with y < 0 (Fig2).

SUFF.
Attachments

Fig1_Below 3.5 x X and X positive.GIF [ 3.07 KiB | Viewed 1345 times ]

Fig2_Below X and X positive.GIF [ 2.53 KiB | Viewed 1341 times ]

Last edited by Fig on 06 Feb 2007, 00:13, edited 1 time in total.
SVP
Joined: 01 May 2006
Posts: 1796
Followers: 9

Kudos [?]: 154 [0], given: 0

Re: DS - Is y>0? [#permalink]

### Show Tags

06 Feb 2007, 00:08
devilmirror wrote:
devilmirror wrote:
Question: x and y are integers. x > 0, y > 0 ?

Info(1): 7x-2y>0
-2y>-7x
y<7x>x
y<x>0 or -x<0
we can conclude that y<-x<0
or y<0>0? The answer is NO. SUFF

Could anyone fix the bugs about inequality signs?
I do not want to type the answer all over again.

In your post, click the option "Disable HTML in this post". U should not have any problem after that
SVP
Joined: 05 Jul 2006
Posts: 1747
Followers: 6

Kudos [?]: 357 [0], given: 49

### Show Tags

06 Feb 2007, 04:06
If x and y are integers and x>0, is y>0?

1) 7x-2y>0

2) -y>x

7x>2y..........insuff

from two

-y>x ...........suff ( x is +ve thus sure -y is too , and y is -ve

the answer is NO Y IS NOT +VE
Senior Manager
Joined: 17 Aug 2005
Posts: 391
Location: Boston, MA
Followers: 2

Kudos [?]: 105 [0], given: 0

### Show Tags

06 Feb 2007, 07:44
Sorry folks, typo in the question.

stmt (2) should be: -y<x>0, is y>0?

1) 7x-2y>0

2) -y<x

Current Student
Joined: 28 Dec 2004
Posts: 3364
Location: New York City
Schools: Wharton'11 HBS'12
Followers: 15

Kudos [?]: 297 [0], given: 2

### Show Tags

06 Feb 2007, 09:36
B it is...

statment 1) easy...Insuff

statement 2) -y>x, we know x >0

therefore y has to be less than zero, has to be negative...suff
Intern
Joined: 13 Feb 2007
Posts: 7
Followers: 0

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

### Show Tags

13 Feb 2007, 19:57
buckkitty wrote:
Sorry folks, typo in the question.

stmt (2) should be: -y<x>0, is y>0?

1) 7x-2y>0

2) -y<x

then the answer i guess is E.

y (<) 3.5*x ; insuff

-y< x ; y can also be negative where |y|<x or simply be positive

and from both 1 & 2 does not constrain y hence E. Simply draw the lines y = 3.5 x and y= -x and the area between them is the solution and in both cases Y is not bounded to the first quadrant. hence E.

hence both are inSuff
Senior Manager
Joined: 12 Mar 2006
Posts: 365
Schools: Kellogg School of Management
Followers: 3

Kudos [?]: 71 [0], given: 3

### Show Tags

13 Feb 2007, 22:40
stat1: 7x-2y>0

=> y < 7*x/2 so even if x is 100, y can be -1 or 1 so insuff

stat2: -y<x> y > x so if x>0 y is certainly > 0 so suff

B
13 Feb 2007, 22:40
Display posts from previous: Sort by

# If x and y are integers and x>0, is y>0? 1) 7x-2y>0

 Powered by phpBB © phpBB Group and phpBB SEO Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.