It is currently 21 Nov 2017, 07:04

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.

Close

Request Expert Reply

Confirm Cancel

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

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

  post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
Senior Manager
Senior Manager
avatar
Joined: 08 Aug 2005
Posts: 251

Kudos [?]: 67 [0], given: 0

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

Show Tags

New post 06 May 2006, 03:43
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

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

Kudos [?]: 67 [0], given: 0

Director
Director
avatar
Joined: 13 Nov 2003
Posts: 788

Kudos [?]: 64 [0], given: 0

Location: BULGARIA
 [#permalink]

Show Tags

New post 06 May 2006, 04:08
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 :?

Kudos [?]: 64 [0], given: 0

Intern
Intern
avatar
Joined: 18 Jan 2006
Posts: 27

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

 [#permalink]

Show Tags

New post 07 May 2006, 13:57
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.

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

VP
VP
User avatar
Joined: 29 Apr 2003
Posts: 1402

Kudos [?]: 30 [0], given: 0

 [#permalink]

Show Tags

New post 07 May 2006, 15:18
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!

Kudos [?]: 30 [0], given: 0

Manager
Manager
avatar
Joined: 27 Mar 2006
Posts: 136

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

 [#permalink]

Show Tags

New post 07 May 2006, 16:15
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?

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

Manager
Manager
avatar
Joined: 11 Oct 2005
Posts: 94

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

 [#permalink]

Show Tags

New post 09 May 2006, 09:17
trick question. I agree with B

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

VP
VP
User avatar
Joined: 29 Dec 2005
Posts: 1337

Kudos [?]: 69 [0], given: 0

 [#permalink]

Show Tags

New post 09 May 2006, 10:49
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.

Kudos [?]: 69 [0], given: 0

Manager
Manager
avatar
Joined: 10 May 2006
Posts: 186

Kudos [?]: 5 [0], given: 0

Location: USA
 [#permalink]

Show Tags

New post 11 May 2006, 13:04
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!

Kudos [?]: 5 [0], given: 0

Senior Manager
Senior Manager
User avatar
Joined: 08 Jun 2004
Posts: 494

Kudos [?]: 95 [0], given: 0

Location: Europe
 [#permalink]

Show Tags

New post 12 May 2006, 00:55
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.

Kudos [?]: 95 [0], given: 0

  [#permalink] 12 May 2006, 00:55
Display posts from previous: Sort by

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

  post reply Question banks Downloads My Bookmarks Reviews Important topics  

Moderator: chetan2u



GMAT Club MBA Forum Home| About| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

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®.