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

It is currently 29 Aug 2014, 02:19

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

G, M, and N are integers, M=X+6; G is the greatest common

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Senior Manager
Senior Manager
avatar
Joined: 08 Aug 2005
Posts: 253
Followers: 1

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

GMAT Tests User
G, M, and N are integers, M=X+6; G is the greatest common [#permalink] New post 06 May 2006, 02:43
G, M, and N are integers, M=X+6; G is the greatest common factor of M and N. G=?

1) N=2531
2) N=X+7
Director
Director
avatar
Joined: 13 Nov 2003
Posts: 801
Location: BULGARIA
Followers: 1

Kudos [?]: 19 [0], given: 0

GMAT Tests User
 [#permalink] New post 06 May 2006, 03:08
From A) 2531 is a prime so M=q* 2531. Since 2531 is the GREATEST common factor, or G, then G-2531 so A SUF

From B) seems that M and N are consecutive integers and their GCF is 1 so B is SUFF

Tough Q :?
Intern
Intern
avatar
Joined: 18 Jan 2006
Posts: 27
Followers: 0

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

 [#permalink] New post 07 May 2006, 12:57
It is C.

1 Not suff - We donot know what is X. X can be 2525 in which case G will be 2531 or X can be other than 2525 in which case G will be 1.

2 Not suff - We donot know what is M and N.

Combine together. we have M = X + 6 and N = X + 7. 2 consecutive numbers and hence G is 1.
VP
VP
User avatar
Joined: 29 Apr 2003
Posts: 1408
Followers: 2

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

GMAT Tests User
 [#permalink] New post 07 May 2006, 14:18
narsi wrote:
It is C.

1 Not suff - We donot know what is X. X can be 2525 in which case G will be 2531 or X can be other than 2525 in which case G will be 1.

2 Not suff - We donot know what is M and N.

Combine together. we have M = X + 6 and N = X + 7. 2 consecutive numbers and hence G is 1.


Why do u think B is not sufficient? I think B is! It shows that they are consecutive, hence relatively prime!
Manager
Manager
avatar
Joined: 27 Mar 2006
Posts: 136
Followers: 1

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

GMAT Tests User
 [#permalink] New post 07 May 2006, 15:15
BG wrote:
From A) 2531 is a prime so M=q* 2531. Since 2531 is the GREATEST common factor, or G, then G-2531 so A SUF



How do you quickly determine if a number is prime?
Manager
Manager
avatar
Joined: 11 Oct 2005
Posts: 94
Followers: 1

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

GMAT Tests User
 [#permalink] New post 09 May 2006, 08:17
trick question. I agree with B
VP
VP
User avatar
Joined: 29 Dec 2005
Posts: 1351
Followers: 6

Kudos [?]: 28 [0], given: 0

GMAT Tests User
 [#permalink] New post 09 May 2006, 09:49
BG wrote:
From A) 2531 is a prime so M=q* 2531. Since 2531 is the GREATEST common factor, or G, then G-2531 so A SUF

From B) seems that M and N are consecutive integers and their GCF is 1 so B is SUFF

Tough Q :?


beautiful work. but how do you know that, in a, gcf is 2531? m could also be 2531. so gcf could be 1 or 2531.

agree with B.
Manager
Manager
avatar
Joined: 10 May 2006
Posts: 186
Location: USA
Followers: 1

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

GMAT Tests User
 [#permalink] New post 11 May 2006, 12:04
shevy wrote:
BG wrote:
From A) 2531 is a prime so M=q* 2531. Since 2531 is the GREATEST common factor, or G, then G-2531 so A SUF



How do you quickly determine if a number is prime?


Does anyone have any answer to this? I wouldn't be able to tell just by looking at the problem that 2531 is a prime number. Any shortcuts to calculate this?

Thanks!
Director
Director
User avatar
Joined: 08 Jun 2004
Posts: 502
Location: Europe
Followers: 1

Kudos [?]: 10 [0], given: 0

GMAT Tests User
 [#permalink] New post 11 May 2006, 23:55
Definitely 'B'.

M=X+6; from 2) N=X+7.
M=N-1, so we have 1 as GCF.

Guys please remember me the rule when the digit is divided by 3, when by 4, by 6, by 7, by 8, by 9.
I forgot it. Just remember something like when the sum of the last 2 digits of any number is divided by 4 the number is divided by 4.

Thank you.
  [#permalink] 11 May 2006, 23:55
    Similar topics Author Replies Last post
Similar
Topics:
4 Experts publish their posts in the topic In the sequence g_n defined for all positive integer daviesj 3 22 Dec 2012, 06:28
2 If the greatest common factor of two integers, m and n, is rxs0005 7 20 Mar 2011, 08:52
G cmugeria 3 04 May 2010, 11:03
G freshbd 0 23 Dec 2007, 00:18
G is the common factor of K+7 and n, n and k are positive WinWinMBA 6 28 May 2005, 14:32
Display posts from previous: Sort by

G, M, and N are integers, M=X+6; G is the greatest common

  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®.