Last visit was: 19 Nov 2025, 11:01 It is currently 19 Nov 2025, 11:01
Home
GMAT
Messages
Tests
Schools
Events
Rewards
Chat
My Profile
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.
Go to My Error Log Learn more
Close
Request Expert Reply
Confirm Cancel
User avatar
Juaz
User avatar
Joined: 18 Jul 2006
Last visit: 06 Oct 2008
Posts: 241
Own Kudos:
307
Posts: 241
Kudos: 307
Is n/18 an integer? (1) 5n/18 is an integer. (2) 3n/18 is an 19 May 2007, 17:56
Kudos
Add Kudos
Bookmarks
Bookmark this Post
00:00
Start Timer
Pause Timer
Resume Timer
Show Answer
Hide
Show
History
N
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!

Difficulty:

(N/A)

Question Stats:

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

History

Date
Time
Result
Not Attempted Yet
Is n/18 an integer?

(1) 5n/18 is an integer.

(2) 3n/18 is an integer.



Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Data Sufficiency (DS) Forum
Still interested in this question? Check out the "Best Topics" block below for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
User avatar
mNeo
User avatar
Current Student
Joined: 22 Apr 2007
Last visit: 04 Sep 2009
Posts: 1,034
Own Kudos:
30
Posts: 1,034
Kudos: 30
Is n/18 an integer? (1) 5n/18 is an integer. (2) 3n/18 is an 19 May 2007, 18:05
Kudos
Add Kudos
Bookmarks
Bookmark this Post
1
Insufficient. Imagine if n is 18/5. Sufficient for (1), but n is still not an integer

2
Clearly Insufficient
User avatar
kirakira
User avatar
Joined: 02 May 2007
Last visit: 25 Jun 2007
Posts: 54
Own Kudos:
8
Posts: 54
Kudos: 8
Is n/18 an integer? (1) 5n/18 is an integer. (2) 3n/18 is an 19 May 2007, 18:52
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Himalayan
Juaz
Is n/18 an integer?

(1) 5n/18 is an integer.

(2) 3n/18 is an integer.


i. is sufficient. if 5n/18 is an integer, n should be a multiple of 18. therefore, n/18 sould be an integer.
ii is nsf.

A.
Show more


(1) Not sure about that, Himalayan. Because the question does not state clearly n is an interger, n can be a fraction => n/18 can be a fraction as well.

(E) it is
User avatar
Sergey_is_cool
User avatar
Joined: 03 May 2007
Last visit: 04 Jan 2011
Posts: 141
Own Kudos:
20
Posts: 141
Kudos: 20
Is n/18 an integer? (1) 5n/18 is an integer. (2) 3n/18 is an 19 May 2007, 19:17
Kudos
Add Kudos
Bookmarks
Bookmark this Post
they don't specify if n is an integer or not and it's a good sign that it's not. So I E is the answer
User avatar
Himalayan
User avatar
Joined: 26 Feb 2006
Last visit: 09 Aug 2011
Posts: 384
Own Kudos:
627
Posts: 384
Kudos: 627
Is n/18 an integer? (1) 5n/18 is an integer. (2) 3n/18 is an 19 May 2007, 19:41
Kudos
Add Kudos
Bookmarks
Bookmark this Post
kirakira
Himalayan
Juaz
Is n/18 an integer?

(1) 5n/18 is an integer.

(2) 3n/18 is an integer.


i. is sufficient. if 5n/18 is an integer, n should be a multiple of 18. therefore, n/18 sould be an integer.
ii is nsf.

A.

(1) Not sure about that, Himalayan. Because the question does not state clearly n is an interger, n can be a fraction => n/18 can be a fraction as well.

(E) it is
Show more


you are absolutly correct.

previously i thought n is an integer but when i realized the fact that n is not an integer, i deleted my post but you caught it..
User avatar
vshaunak@gmail.com
User avatar
Joined: 14 Jan 2007
Last visit: 04 Feb 2009
Posts: 312
Own Kudos:
948
Posts: 312
Kudos: 948
Is n/18 an integer? (1) 5n/18 is an integer. (2) 3n/18 is an 20 May 2007, 04:22
Kudos
Add Kudos
Bookmarks
Bookmark this Post
I think the answer is 'C'.

stmt1: INSUFF as it n/18 can be integer or fraction like 1/5
stmt2: same way as stmt1 INSUFF

Taking them together:
for stmt1 and stmt2 to be together true, the n/18 should be an integer.
hence SUFF
User avatar
abhinava
User avatar
Joined: 23 Mar 2007
Last visit: 09 Apr 2010
Posts: 74
Own Kudos:
12
Posts: 74
Kudos: 12
Is n/18 an integer? (1) 5n/18 is an integer. (2) 3n/18 is an 20 May 2007, 13:05
Kudos
Add Kudos
Bookmarks
Bookmark this Post
vshaunak@gmail.com
I think the answer is 'C'.

stmt1: INSUFF as it n/18 can be integer or fraction like 1/5
stmt2: same way as stmt1 INSUFF

Taking them together:
for stmt1 and stmt2 to be together true, the n/18 should be an integer.
hence SUFF
Show more


PLease explain how both the statements taken together make sure that n/18 is an integer.
User avatar
KillerSquirrel
User avatar
Joined: 08 Jun 2005
Last visit: 28 Mar 2009
Posts: 520
Own Kudos:
634
Posts: 520
Kudos: 634
Is n/18 an integer? (1) 5n/18 is an integer. (2) 3n/18 is an 20 May 2007, 14:46
Kudos
Add Kudos
Bookmarks
Bookmark this Post
abhinava
vshaunak@gmail.com
I think the answer is 'C'.

stmt1: INSUFF as it n/18 can be integer or fraction like 1/5
stmt2: same way as stmt1 INSUFF

Taking them together:
for stmt1 and stmt2 to be together true, the n/18 should be an integer.
hence SUFF

PLease explain how both the statements taken together make sure that n/18 is an integer.
Show more


is n/18 = integer ?

in order for n/18 to be an integer n has to be greater then or equal to 18.

n>= 18

Statement 1

5*n/18 = integer

n can be 18/5 or 18

less or equal to 18.

insufficient

Statement 2

3*n/18 = integer

n can be 6 or 18

less or equal to 18.

insufficent

Statements 1&2

3*n/18 , 5*n/18

the only way n can be an integer is when n >= 18

sufficient

the answer is then (C)

:-D
User avatar
mavery
User avatar
Joined: 11 Mar 2007
Last visit: 22 Aug 2009
Posts: 30
Own Kudos:
3
Posts: 30
Kudos: 3
Is n/18 an integer? (1) 5n/18 is an integer. (2) 3n/18 is an 20 May 2007, 14:59
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Prime factors of 5n/18 = 5, 3, 2, 2
Prime factors of 3n/18 = 3, 3, 2, 2

So for n/18 to be an integer, it would need to be divisible by 18...using the prime factors of both statements, 3*3*2=18...sufficient...

C it is...



Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Data Sufficiency (DS) Forum
Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
Moderators:
Bunuel
Math Expert
105390 posts
GMATBusters
GMAT Tutor
1924 posts