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# Is n/18 an integer?

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Intern
Joined: 29 Aug 2013
Posts: 40
GPA: 3.76
WE: Supply Chain Management (Transportation)

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12 Mar 2016, 09:04
3
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Difficulty:

35% (medium)

Question Stats:

65% (00:54) correct 35% (01:23) wrong based on 44 sessions

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If n is a positive integer, is n/18 an integer?

(1) 5n/18 is an integer.

(2) 3n/18 is an integer.

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Joined: 02 Aug 2009
Posts: 7038
Re: Is n/18 an integer?  [#permalink]

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12 Mar 2016, 09:35
shapla wrote:
If n is a positive integer, is n/18 an integer?

(1) 5n/18 is an integer.

(2) 3n/18 is an integer.

Hi,
If n is the multiple of 18 ,ans is yes..

Let's see the statements
1) 5n/18 is integer
Since 5 and 18 are coprimes, n must be a multiple of 18..
Suff

2) 3n/18 is an integer.
Since 3 and18 are not coprimes, n may or may not be multiple of 18..
Insuff.

Ans A
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1) Absolute modulus : http://gmatclub.com/forum/absolute-modulus-a-better-understanding-210849.html#p1622372
2)Combination of similar and dissimilar things : http://gmatclub.com/forum/topic215915.html
3) effects of arithmetic operations : https://gmatclub.com/forum/effects-of-arithmetic-operations-on-fractions-269413.html

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Joined: 03 Mar 2016
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Re: Is n/18 an integer?  [#permalink]

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12 Mar 2016, 09:45
Option 1 is not alone enough and the answer is C.Please refer to similar questions for explanation
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Joined: 20 Mar 2014
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Schools: Kellogg '18 (M)
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Re: Is n/18 an integer?  [#permalink]

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12 Mar 2016, 09:50
vardhanindaram wrote:
Option 1 is not alone enough and the answer is C.Please refer to similar questions for explanation

Please participate in the discussion completely by providing your solution and thereby helping others. Just mentioning to refer to similar questions for explanation does not help anyone.
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Joined: 02 Aug 2009
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Re: Is n/18 an integer?  [#permalink]

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12 Mar 2016, 09:55
1
vardhanindaram wrote:
Option 1 is not alone enough and the answer is C.Please refer to similar questions for explanation

Hi,
You have to be sure if the q are same.
This q tells us that n is a positive integer, so you don't have to look for fraction and answer is yes for A.
It is always important to gather all the information from Q.
Ans will be A only
_________________

1) Absolute modulus : http://gmatclub.com/forum/absolute-modulus-a-better-understanding-210849.html#p1622372
2)Combination of similar and dissimilar things : http://gmatclub.com/forum/topic215915.html
3) effects of arithmetic operations : https://gmatclub.com/forum/effects-of-arithmetic-operations-on-fractions-269413.html

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CEO
Joined: 20 Mar 2014
Posts: 2635
Concentration: Finance, Strategy
Schools: Kellogg '18 (M)
GMAT 1: 750 Q49 V44
GPA: 3.7
WE: Engineering (Aerospace and Defense)
Re: Is n/18 an integer?  [#permalink]

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12 Mar 2016, 10:13
1
shapla wrote:
Engr2012 wrote:
shapla wrote:
If n is a positive integer, is n/18 an integer?

(1) 5n/18 is an integer.

(2) 3n/18 is an integer.

Search for a question before you post and follow posting guidelines (link in my signatures). topics merged.

Hi Engr2012,

I did search the question in the forum before posting, but didn't find any. There might be similar question in the forum, but exact match is not there.

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Re: Is n/18 an integer?  [#permalink]

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12 Mar 2016, 11:11
chetan2u wrote:
vardhanindaram wrote:
Option 1 is not alone enough and the answer is C.Please refer to similar questions for explanation

Hi,
You have to be sure if the q are same.
This q tells us that n is a positive integer, so you don't have to look for fraction and answer is yes for A.
It is always important to gather all the information from Q.
Ans will be A only

Thanks for the correction.
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Re: Is n/18 an integer?  [#permalink]

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10 Jul 2018, 20:21
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Re: Is n/18 an integer? &nbs [#permalink] 10 Jul 2018, 20:21
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