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

It is currently 31 Aug 2015, 22:17
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.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

Is n an integer? 1) n2 is an integer 2) sqrt n is an integer

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
Manager
Manager
avatar
Joined: 12 Feb 2008
Posts: 180
Followers: 1

Kudos [?]: 34 [0], given: 0

Is n an integer? 1) n2 is an integer 2) sqrt n is an integer [#permalink] New post 24 Jun 2008, 06:54
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Is n an integer?

1) n2 is an integer
2) sqrt n is an integer

is someone can show me an example of n2 not beeing an integer will be very much appreciated.

thanks!
Director
Director
avatar
Joined: 13 Nov 2003
Posts: 790
Location: BULGARIA
Followers: 1

Kudos [?]: 31 [0], given: 0

Re: DS: Integer or not [#permalink] New post 24 Jun 2008, 06:58
Hi,
As far as i understand your question you want to see if A is incorrect.
If n=sqrt2 then n^2=2 and n is NOT an integer . If n=2 then n^2=4 and n IS an integer
hope it helps
Director
Director
avatar
Joined: 01 Jan 2008
Posts: 629
Followers: 3

Kudos [?]: 142 [0], given: 1

Re: DS: Integer or not [#permalink] New post 24 Jun 2008, 06:59
elmagnifico wrote:
Is n an integer?

1) n2 is an integer
2) sqrt n is an integer

is someone can show me an example of n2 not beeing an integer will be very much appreciated.

thanks!


1) if n^2 is an integer: for example n^2 = 3 -> n = sqrt(3) - not an integer; n^2 = 4 -> n = 2 - integer -> insufficient
2) sqrt(n) is an integer -> n = sqrt(n)*sqrt(n) = integer -> sufficient -> B
SVP
SVP
User avatar
Joined: 30 Apr 2008
Posts: 1889
Location: Oklahoma City
Schools: Hard Knocks
Followers: 36

Kudos [?]: 485 [0], given: 32

Re: DS: Integer or not [#permalink] New post 24 Jun 2008, 07:33
People gotta start using the math functions on here so the problems make sense.

n2 = n * 2....totally different than \(n^2\)

http://gmatclub.com/wiki/Help:Formulas
_________________

------------------------------------
J Allen Morris
**I'm pretty sure I'm right, but then again, I'm just a guy with his head up his a$$.

GMAT Club Premium Membership - big benefits and savings

Re: DS: Integer or not   [#permalink] 24 Jun 2008, 07:33
Display posts from previous: Sort by

Is n an integer? 1) n2 is an integer 2) sqrt n is an integer

  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®.