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

It is currently 21 Oct 2014, 07:48

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

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

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
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] New post 20 Oct 2006, 16:21
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: 1

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

Re: Quant Question [#permalink] 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: 113
Followers: 2

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

 [#permalink] 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.)
Director
Director
avatar
Joined: 01 Oct 2006
Posts: 500
Followers: 1

Kudos [?]: 16 [0], given: 0

 [#permalink] New post 21 Oct 2006, 02:34
My answer is also A..
Director
Director
avatar
Joined: 01 Oct 2006
Posts: 500
Followers: 1

Kudos [?]: 16 [0], given: 0

 [#permalink] 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] 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: 1

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

[#permalink] 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
    Similar topics Author Replies Last post
Similar
Topics:
35 Experts publish their posts in the topic If x and y are positive, which of the following must be noboru 36 08 Aug 2009, 06:57
If x and y are positive, which of the following must be eagerbeaver 9 11 Oct 2006, 18:04
If x and y are positive, which of the following must be gmacvik 2 22 Sep 2006, 21:50
1 If x and y are positive, which of the following must be ns 5 17 Jun 2006, 14:15
If x and y are positive, which of the following must be M8 6 12 May 2006, 04:03
Display posts from previous: Sort by

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

  Question banks Downloads My Bookmarks Reviews Important topics  


cron

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®.