Find all School-related info fast with the new School-Specific MBA Forum
Learn more about the recent changes... close

It is currently 23 May 2013, 12:11
Customize  |  Hide

Search
Register
New posts
Unanswered

GMAT Prep : DS

  Question banks Downloads My Bookmarks Reviews  
  Oldest Best Reply
Search for:
 
Print view
First unread post
Author Message
TAGS:
Manager
Manager
Joined: 10 Oct 2005
Posts: 56
Followers: 1

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

GMAT Tests User
GMAT Prep : DS [#permalink] New post 04 Jul 2006, 13:57
00:00

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
Please see the attachment for the question
Attachments

File comment: GmatPrep DS
GprepReal.JPG
GprepReal.JPG [ 11.55 KiB | Viewed 197 times ]

Manager
Manager
User avatar
Joined: 25 May 2006
Posts: 231
Followers: 1

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

GMAT Tests User
 [#permalink] New post 04 Jul 2006, 14:25
Only 5

sqrt(5) is aprox 2.2...

so 2-2.2 will give you a negative number, and sqrt(neg numb) is an imaginary number.
_________________

Who is John Galt?

CEO
CEO
User avatar
Joined: 20 Nov 2005
Posts: 2934
Schools: Completed at SAID BUSINESS SCHOOL, OXFORD - Class of 2008
Followers: 7

Kudos [?]: 37 [0], given: 0

GMAT Tests User
 [#permalink] New post 04 Jul 2006, 14:58
When 2-SQRT(x) is -ve then the expression become undefined.

This happens when x = 5
_________________

SAID BUSINESS SCHOOL, OXFORD - MBA CLASS OF 2008

Manager
Manager
User avatar
Joined: 19 Apr 2006
Posts: 231
Followers: 1

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

GMAT Tests User
 [#permalink] New post 04 Jul 2006, 16:33
5
sqrt(5) > 2
can not take a sqrt of a negative...
SVP
SVP
User avatar
Joined: 30 Mar 2006
Posts: 1744
Followers: 1

Kudos [?]: 12 [0], given: 0

GMAT Tests User
 [#permalink] New post 05 Jul 2006, 02:18
Clear winner 5

To make the equation an nreal number the value under the roots should be negative.

This can be done only with 5

Hence E
Manager
Manager
Joined: 10 Oct 2005
Posts: 56
Followers: 1

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

GMAT Tests User
 [#permalink] New post 05 Jul 2006, 10:08
Thanks Guys. My funda on Imaginary number is crystal clear :)
VP
VP
User avatar
Joined: 02 Jun 2006
Posts: 1278
Followers: 2

Kudos [?]: 15 [0], given: 0

GMAT Tests User
 [#permalink] New post 05 Jul 2006, 15:25
Easy one... E. 5.

SQRT(5) = 2.xx

SQRT(2-2.xx) = SQRT(-ve number) = imaginary.
  [#permalink] 05 Jul 2006, 15:25
    Similar topics Author Replies Last post
Similar
Topics:
 New posts DS-Gmat Prep cool_jonny009 1 19 Feb 2006, 19:59
New posts ds - gmat prep qn rabbithole 2 25 Apr 2006, 20:17
New posts DS - Gmat Prep Median gmat_crack 4 13 Jun 2006, 21:14
New posts DS- GMAT Prep brcinsf 4 21 Jun 2006, 22:42
New posts DS: GMAT Prep haas_mba07 2 16 Jul 2006, 18:49
Display posts from previous: Sort by

GMAT Prep : DS

  Question banks Downloads My Bookmarks Reviews  
Print view
First unread post

Moderators: Bunuel, VeritasPrepKarishma, IanStewart

Search for:


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®.

Main navigation

GMAT Resources

Partners

MBA Resources

www.gmac.com|www.mba.com