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

It is currently 29 Jul 2014, 03:00

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 the positive integer n an odd integer? (1) n+4 is a prime

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
VP
VP
avatar
Joined: 22 Nov 2007
Posts: 1101
Followers: 6

Kudos [?]: 109 [0], given: 0

GMAT Tests User
Is the positive integer n an odd integer? (1) n+4 is a prime [#permalink] New post 10 Mar 2008, 22:15
Is the positive integer n an odd integer?
(1) n+4 is a prime number.
(2) n+3 is not a prime number.
SVP
SVP
avatar
Joined: 04 May 2006
Posts: 1942
Schools: CBS, Kellogg
Followers: 15

Kudos [?]: 255 [0], given: 1

Premium Member CAT Tests
Re: gmatprep integers and prime n [#permalink] New post 11 Mar 2008, 00:55
marcodonzelli wrote:
Is the positive integer n an odd integer?
(1) n+4 is a prime number.
(2) n+3 is not a prime number.


A

1. n + 4 >4 and n + 4 is a prime number -> n+4 is odd --> n odd: sufficient

2. n+3 > 3 and n + 3 is NOT a prime, n+ 3 = 4 --> n odd; n+3 =5 --> n even: not sufficient
_________________

Get the best GMAT Prep Resources with GMAT Club Premium Membership

Manager
Manager
avatar
Joined: 10 Mar 2008
Posts: 67
Followers: 2

Kudos [?]: 24 [0], given: 0

Re: gmatprep integers and prime n [#permalink] New post 11 Mar 2008, 04:52
hi sondenso u are right but the correct solution here is
Even + Even=Even
Even + Odd=Odd
So if we have n+4 is prime then n should be odd because 4 is even.
n+3 can be odd or even depending on the value of n
so ans is A
Re: gmatprep integers and prime n   [#permalink] 11 Mar 2008, 04:52
    Similar topics Author Replies Last post
Similar
Topics:
2 Experts publish their posts in the topic If n is an integer, is n + 4 a prime number? metallicafan 6 18 Nov 2011, 09:15
1 Is the postive integer n an odd number (1) n + 4 is a prime siddhans 2 23 Jul 2011, 21:07
Is the positive integer n an odd integer? 1) n+4 is a prime DTM 2 19 Oct 2007, 20:28
What is the value of the positive integer n? (1) n4 < 25 crazy123 2 11 Aug 2007, 21:07
What is the value of the positive integer n? 1) n^ 4 < Seyi 5 10 Dec 2004, 08:10
Display posts from previous: Sort by

Is the positive integer n an odd integer? (1) n+4 is a prime

  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®.