what is the greatest common divisor of positive integers m : DS Archive
Check GMAT Club Decision Tracker for the Latest School Decision Releases http://gmatclub.com/AppTrack

 It is currently 24 Jan 2017, 01:42

### 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

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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# what is the greatest common divisor of positive integers m

Author Message
Current Student
Joined: 31 Aug 2007
Posts: 369
Followers: 1

Kudos [?]: 127 [0], given: 1

what is the greatest common divisor of positive integers m [#permalink]

### Show Tags

06 Nov 2007, 12:49
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

### HideShow timer Statistics

This topic is locked. If you want to discuss this question please re-post it in the respective forum.

what is the greatest common divisor of positive integers m and n?

1-m is prime
2-2n=7m
VP
Joined: 09 Jul 2007
Posts: 1104
Location: London
Followers: 6

Kudos [?]: 103 [0], given: 0

### Show Tags

06 Nov 2007, 17:13
young_gun wrote:
what is the greatest common divisor of positive integers m and n?

1-m is prime
2-2n=7m

c or E. confused
1. m=2,3,5,7,11,.... what is n? insuff.
2. 2n=7m can be anything. n=14 and m=4 here 2, n=21 and m=6 here 3 so insuff.

together.

m is prime. 2n=7m, we need 7*2 and 2 is an integer. so 2n=7*2. or m=2 and n=7
m and n do not have a common divisor
Intern
Joined: 10 Feb 2007
Posts: 45
Followers: 0

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

### Show Tags

06 Nov 2007, 21:20
I get C because in DS questions, if you are able to get a definitive yes, then the answer is yes, thus C.

2 and 7 does not have a common divisor.
SVP
Joined: 05 Jul 2006
Posts: 1743
Followers: 6

Kudos [?]: 318 [0], given: 49

### Show Tags

08 Nov 2007, 13:54
both together,

m= 2/7n, m is prime thus m=2 and n=7

CEO
Joined: 29 Mar 2007
Posts: 2583
Followers: 19

Kudos [?]: 422 [0], given: 0

### Show Tags

08 Nov 2007, 21:37
young_gun wrote:
what is the greatest common divisor of positive integers m and n?

1-m is prime
2-2n=7m

was 2-2n=7m I was like how the heck can n be + then???

S1: Insuff, nothin bout N

S2: 2n=7m just plug in for either. m=2 n=7 m=4 n=14

GCF for first =1 GCF for second = 2. Insuff

if M=prime then---> n=7m/2 M must be divisible by 2 b/c n= integer.

So M=2 since its the only prime divisible by 2. thus n=7.

GCF =1.

C
Re: DS   [#permalink] 08 Nov 2007, 21:37
Display posts from previous: Sort by