If x and y are positive, which of the following must be : Quant Question Archive [LOCKED]
Check GMAT Club App Tracker for the Latest School Decision Releases http://gmatclub.com/AppTrack

It is currently 07 Dec 2016, 16:53
GMAT Club Tests

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.

Close

Request Expert Reply

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

If x and y are positive, which of the following must be

  post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
Intern
Intern
avatar
Joined: 05 Mar 2006
Posts: 20
Followers: 0

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

If x and y are positive, which of the following must be [#permalink]

Show Tags

New post 20 Oct 2006, 16:21
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

If x and y are positive, which of the following must be greater than 1/sqrt(x+y)
I.) sqrt(x+y)/2x
II.) (sqrt(x) + sqrt(y))/x+y
III.) (sqrt(x)-sqrt(y))/x+y
a.) None
b.) I only
c.) II only
d.) I and III only
e.) II and III
Manager
Manager
User avatar
Joined: 04 Oct 2006
Posts: 122
Location: Florida, Argentina, UK
Followers: 2

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

Re: Quant Question [#permalink]

Show Tags

New post 20 Oct 2006, 19:59
C) II only

Plug in 2=x 2=y; or 1=x 3=y and you will come to this answer in less than 40 secs.
Manager
Manager
User avatar
Joined: 07 Jun 2006
Posts: 111
Followers: 2

Kudos [?]: 26 [0], given: 0

 [#permalink]

Show Tags

New post 20 Oct 2006, 22:23
What if x and y are fractions???????


My ans is A. NONE..........
(.tho I am very much inclined towards C.)
Senior Manager
Senior Manager
avatar
Joined: 01 Oct 2006
Posts: 497
Followers: 1

Kudos [?]: 30 [0], given: 0

 [#permalink]

Show Tags

New post 21 Oct 2006, 02:34
My answer is also A..
Senior Manager
Senior Manager
avatar
Joined: 01 Oct 2006
Posts: 497
Followers: 1

Kudos [?]: 30 [0], given: 0

 [#permalink]

Show Tags

New post 21 Oct 2006, 02:35
My answer is also A..
Intern
Intern
avatar
Joined: 05 Mar 2006
Posts: 20
Followers: 0

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

 [#permalink]

Show Tags

New post 21 Oct 2006, 05:57
The OA is c as pointed out by brufarber.
Manager
Manager
User avatar
Joined: 04 Oct 2006
Posts: 122
Location: Florida, Argentina, UK
Followers: 2

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

[#permalink]

Show Tags

New post 21 Oct 2006, 06:01
girikorat wrote:
What if x and y are fractions???????


My ans is A. NONE..........
(.tho I am very much inclined towards C.)


Try with fractions (1/2 - .5 ) and you will come to the same conclusion, II holds.
)   [#permalink] 21 Oct 2006, 06:01
Display posts from previous: Sort by

If x and y are positive, which of the following must be

  post reply Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| 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®.