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 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 positive, which of the following must be

 post reply Question banks Downloads My Bookmarks Reviews Important topics
Author Message
Intern
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

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
Joined: 04 Oct 2006
Posts: 122
Location: Florida, Argentina, UK
Followers: 2

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

Re: Quant Question [#permalink]

### Show Tags

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
Joined: 07 Jun 2006
Posts: 111
Followers: 2

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

### Show Tags

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
Joined: 01 Oct 2006
Posts: 497
Followers: 1

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

### Show Tags

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

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

### Show Tags

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

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

### Show Tags

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

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

### Show Tags

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

 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®.