Check GMAT Club Decision Tracker for the Latest School Decision Releases https://gmatclub.com/AppTrack

 It is currently 25 May 2017, 05:58

### 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

# If D is the greatest common divisor of A+7 and N, where N an

Author Message
TAGS:

### Hide Tags

Intern
Joined: 02 Oct 2013
Posts: 12
Followers: 0

Kudos [?]: 4 [0], given: 1

If D is the greatest common divisor of A+7 and N, where N an [#permalink]

### Show Tags

22 Oct 2013, 02:01
4
This post was
BOOKMARKED
00:00

Difficulty:

55% (hard)

Question Stats:

54% (02:21) correct 46% (01:14) wrong based on 141 sessions

### HideShow timer Statistics

If D is the greatest common divisor of A+7 and N, where N and A are integers. What is the value of D

(1) N = 20891
(2) N = A + 6
[Reveal] Spoiler: OA

Last edited by Bunuel on 22 Oct 2013, 02:36, edited 2 times in total.
Edited the question.
MBA Section Director
Status: Back to work...
Affiliations: GMAT Club
Joined: 22 Feb 2012
Posts: 4316
Location: India
City: Pune
GMAT 1: 680 Q49 V34
GPA: 3.4
Followers: 440

Kudos [?]: 3175 [2] , given: 2300

### Show Tags

22 Oct 2013, 02:17
2
KUDOS
Expert's post
2
This post was
BOOKMARKED
DivyanshuRohatgi wrote:
If D is the greatest common divisor of A+7 and n , where n and A are integers . What is the value of D

1. N=20891
2. N=A+6

Can someone help me with this

IMO B

2nd statement tells us that second integer is A+6, and the question stem tells us that fist integer is A+7

So they are consecutive integers. Consecutive integers have only one factor in common which is 1. So their GCD is 1

NOTE :- Always name the topic properly.
_________________
Manager
Joined: 04 Oct 2013
Posts: 87
Location: Brazil
GMAT 1: 660 Q45 V35
GMAT 2: 710 Q49 V38
Followers: 3

Kudos [?]: 69 [0], given: 45

### Show Tags

16 Nov 2013, 14:50
Narenn wrote:
DivyanshuRohatgi wrote:
Consecutive integers have only one factor in common which is 1.

AKA, coprimes!
Intern
Status: preparing for the GMAT
Joined: 16 Jul 2013
Posts: 39
Concentration: Technology, Entrepreneurship
GMAT Date: 10-15-2013
GPA: 3.53
Followers: 0

Kudos [?]: 8 [0], given: 5

### Show Tags

20 Nov 2013, 03:51
Narenn wrote:

Consecutive integers have only one factor in common which is 1. So their GCD is 1

too many properties to remember.

thanks
_________________

لا الله الا الله, محمد رسول الله

You never fail until you stop trying ,,,

Current Student
Joined: 06 Sep 2013
Posts: 2005
Concentration: Finance
Followers: 68

Kudos [?]: 643 [0], given: 355

### Show Tags

06 Jan 2014, 10:20
Narenn wrote:
DivyanshuRohatgi wrote:
If D is the greatest common divisor of A+7 and n , where n and A are integers . What is the value of D

1. N=20891
2. N=A+6

Can someone help me with this

IMO B

2nd statement tells us that second integer is A+6, and the question stem tells us that fist integer is A+7

So they are consecutive integers. Consecutive integers have only one factor in common which is 1. So their GCD is 1

NOTE :- Always name the topic properly.

I though that number was prime

Cheers!
J
MBA Section Director
Status: Back to work...
Affiliations: GMAT Club
Joined: 22 Feb 2012
Posts: 4316
Location: India
City: Pune
GMAT 1: 680 Q49 V34
GPA: 3.4
Followers: 440

Kudos [?]: 3175 [1] , given: 2300

### Show Tags

06 Jan 2014, 12:02
1
KUDOS
Expert's post
jlgdr wrote:
Narenn wrote:
DivyanshuRohatgi wrote:
If D is the greatest common divisor of A+7 and n , where n and A are integers . What is the value of D

1. N=20891
2. N=A+6

Can someone help me with this

IMO B

2nd statement tells us that second integer is A+6, and the question stem tells us that fist integer is A+7

So they are consecutive integers. Consecutive integers have only one factor in common which is 1. So their GCD is 1

NOTE :- Always name the topic properly.

I though that number was prime

Cheers!
J

Still we have two possibilities
A) If 20891 is factor of A+7 then D is 20891
B) If 20891 is not factor of A+7 then D is 1

_________________
GMAT Club Legend
Joined: 09 Sep 2013
Posts: 15435
Followers: 649

Kudos [?]: 208 [0], given: 0

Re: If D is the greatest common divisor of A+7 and N, where N an [#permalink]

### Show Tags

09 Feb 2017, 18:04
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________
Senior Manager
Joined: 29 Oct 2016
Posts: 269
Concentration: Finance, Economics
GMAT 1: 620 Q50 V24
GRE 1: 314 Q167 V147
Followers: 1

Kudos [?]: 24 [0], given: 906

Re: If D is the greatest common divisor of A+7 and N, where N an [#permalink]

### Show Tags

10 Feb 2017, 00:32
jlgdr wrote:
Narenn wrote:
DivyanshuRohatgi wrote:
If D is the greatest common divisor of A+7 and n , where n and A are integers . What is the value of D

1. N=20891
2. N=A+6

Can someone help me with this

IMO B

2nd statement tells us that second integer is A+6, and the question stem tells us that fist integer is A+7

So they are consecutive integers. Consecutive integers have only one factor in common which is 1. So their GCD is 1

NOTE :- Always name the topic properly.

I though that number was prime

Cheers!
J

No,13 is its factor
Re: If D is the greatest common divisor of A+7 and N, where N an   [#permalink] 10 Feb 2017, 00:32
Similar topics Replies Last post
Similar
Topics:
3 When n and k are positive integers, what is the greatest common diviso 3 16 Apr 2017, 18:27
6 If the greatest common factor of two integers, m and n, is 56 and the 7 21 Jan 2017, 10:31
x and y are two positive integers. D is the greatest common divisor of 1 14 Sep 2016, 07:14
15 m = 4n + 9, where n is a positive integer. What is the greatest common 9 02 Dec 2016, 10:49
8 If the greatest common factor of two integers, m and n, is 13 19 Jan 2017, 02:55
Display posts from previous: Sort by