Find all School-related info fast with the new School-Specific MBA Forum

It is currently 28 Aug 2014, 21:41

Close

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
Your Progress

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

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

is XY positive?

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
SVP
SVP
avatar
Joined: 21 Jul 2006
Posts: 1550
Followers: 8

Kudos [?]: 197 [0], given: 1

GMAT Tests User
is XY positive? [#permalink] New post 22 Nov 2007, 02:52
Is XY > 0?

(1) X-Y > -2

(2) X-2Y < -6




Please provide an algebraic way of approaching this when choosing your answer because I believe using algebraic will save a lot more time than think of different numbers.
enjoy it.
Expert Post
CEO
CEO
User avatar
Joined: 17 Nov 2007
Posts: 3571
Concentration: Entrepreneurship, Other
Schools: Chicago (Booth) - Class of 2011
GMAT 1: 750 Q50 V40
Followers: 357

Kudos [?]: 1753 [0], given: 358

GMAT ToolKit User GMAT Tests User Premium Member
 [#permalink] New post 22 Nov 2007, 03:42
Expert's post
I think C. (corrected)
I used drawing.
It seems drawing to be faster way to find solution than algebraic one for me.

Last edited by walker on 22 Nov 2007, 03:46, edited 1 time in total.
SVP
SVP
avatar
Joined: 21 Jul 2006
Posts: 1550
Followers: 8

Kudos [?]: 197 [0], given: 1

GMAT Tests User
 [#permalink] New post 22 Nov 2007, 03:46
how do you do the drawing? is there anyway that you can show me how?
Expert Post
CEO
CEO
User avatar
Joined: 17 Nov 2007
Posts: 3571
Concentration: Entrepreneurship, Other
Schools: Chicago (Booth) - Class of 2011
GMAT 1: 750 Q50 V40
Followers: 357

Kudos [?]: 1753 [0], given: 358

GMAT ToolKit User GMAT Tests User Premium Member
 [#permalink] New post 22 Nov 2007, 03:47
Expert's post
wait a minutes....
Expert Post
CEO
CEO
User avatar
Joined: 17 Nov 2007
Posts: 3571
Concentration: Entrepreneurship, Other
Schools: Chicago (Booth) - Class of 2011
GMAT 1: 750 Q50 V40
Followers: 357

Kudos [?]: 1753 [0], given: 358

GMAT ToolKit User GMAT Tests User Premium Member
 [#permalink] New post 22 Nov 2007, 04:16
Expert's post
xy>0 means that point (x,y) lie in I or III quadrants
xy<0 means that point (x,y) lie in II or IV quadrants

1. X-Y = -2 (red) passes through I,II,III quadrants - insuff

2. X-2Y < -6 (green) passes through I,II,III quadrants - insuff

1&2 (blue area) lies in I quadrant only - suff
Attachments

GC56003.gif
GC56003.gif [ 12.99 KiB | Viewed 458 times ]

SVP
SVP
avatar
Joined: 21 Jul 2006
Posts: 1550
Followers: 8

Kudos [?]: 197 [0], given: 1

GMAT Tests User
 [#permalink] New post 22 Nov 2007, 05:56
wow walker! you're the man. how on earth did you do that? which program are you using? is that just excel or how?
Expert Post
CEO
CEO
User avatar
Joined: 17 Nov 2007
Posts: 3571
Concentration: Entrepreneurship, Other
Schools: Chicago (Booth) - Class of 2011
GMAT 1: 750 Q50 V40
Followers: 357

Kudos [?]: 1753 [0], given: 358

GMAT ToolKit User GMAT Tests User Premium Member
 [#permalink] New post 22 Nov 2007, 07:34
Expert's post
:-D I use PhotoShop
SVP
SVP
User avatar
Joined: 05 Jul 2006
Posts: 1542
Followers: 5

Kudos [?]: 70 [0], given: 39

 [#permalink] New post 22 Nov 2007, 10:47
Is XY > 0?

(1) X-Y > -2

(2) X-2Y < -6


ADD

Y-X<2
X-2Y<-6

-Y<-4

Y>4 , SUBSTITUTE IN 1 , WORST CASE SCNARIO IS THAT X = 4 THUS X>2

THERFORE XY>0
  [#permalink] 22 Nov 2007, 10:47
    Similar topics Author Replies Last post
Similar
Topics:
Experts publish their posts in the topic Is x+y positive? rrsnathan 2 11 Sep 2013, 23:59
If xy not= 0, is /x/*y^2 positive?? i have a fundmental yezz 2 14 Sep 2006, 08:32
x,y are positive intergers, 80=22*x+y what is the value of vivek123 6 30 Jan 2006, 17:49
x,y are positive intergers, 80=22*x+y what is the value of gamjatang 2 11 Dec 2005, 05:38
If x and y are positive integers, is xy evenly divisible by batliwala 2 01 Nov 2004, 03:55
Display posts from previous: Sort by

is XY positive?

  Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Privacy Policy| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

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®.