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

It is currently 22 Oct 2014, 22:50

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 n is a positive integer and r is the remainder when

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Manager
Manager
avatar
Joined: 10 Jul 2009
Posts: 172
Followers: 1

Kudos [?]: 35 [0], given: 8

If n is a positive integer and r is the remainder when [#permalink] New post 28 Jul 2009, 21:08
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
If n is a positive integer and r is the remainder when (n-1)(n+1) is divided by 24. What is the value of r?
1. n is not divisible by 2
2. n is not divisible by 3
Manager
Manager
avatar
Joined: 19 Jun 2009
Posts: 141
Location: India
Concentration: Strategy, General Management
GMAT 1: 650 Q51 V27
GMAT 2: 710 Q48 V39
GPA: 3.2
WE: Engineering (Computer Hardware)
Followers: 5

Kudos [?]: 17 [0], given: 21

Re: DS - Value of r [#permalink] New post 28 Jul 2009, 22:53
Aleehsgonji wrote:
If n is a positive integer and r is the remainder when (n-1)(n+1) is divided by 24. What is the value of r?
1. n is not divisible by 2
2. n is not divisible by 3


1. We know n is not divisible. So, n-1 & n+1 is definitely divisible by 2. But, it's not sufficient to determine 'r'.

2. Even this option does not lead anywhere.

1+2.

If 'n' is not divisible by 2 & 3, it has to be a prime number or a product of prime numbers.

Now, take some examples of such numbers (5,7,35,95 etc.). And you will find that remainder is always '0'.
_________________

I am ready to fall, but not before I fly.

Intern
Intern
avatar
Status: Applying
Joined: 30 Jul 2009
Posts: 39
Followers: 0

Kudos [?]: 4 [0], given: 3

Re: DS - Value of r [#permalink] New post 31 Jul 2009, 11:30
I[EDIT - REMOVED BY USER]
Re: DS - Value of r   [#permalink] 31 Jul 2009, 11:30
    Similar topics Author Replies Last post
Similar
Topics:
1 Experts publish their posts in the topic If n is a positive integer and r is the remainder when (n - ksharma12 5 26 Apr 2010, 13:39
If n is a positive integer and r is the remainder when (n neelesh 1 17 Feb 2008, 08:14
If n is a positive integer and r is the remainder when (n aurobindo 2 23 Jan 2007, 06:47
If n and r are positive integers and r is the remainder when apollo168 8 30 Aug 2006, 10:08
If n is a positive integer and r is the remainder when quangviet512 6 20 Jun 2006, 19:59
Display posts from previous: Sort by

If n is a positive integer and r is the remainder when

  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®.