Events & Promotions
|
|
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
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Apr 3001:30 AM EDT
-02:30 AM EDT
At one point, she believed GMAT wasn’t for her. After scoring 595, self-doubt crept in and she questioned her potential. But instead of quitting, she made the right strategic changes. The result? A remarkable comeback to 695. Check out how Saakshi did it.
Apr 2912:30 AM EDT
-01:30 AM EDT
Learn how Kamakshi achieved a GMAT 675 with an impressive 96th %ile in Data Insights. Discover the unique methods and exam strategies that helped her excel in DI along with other sections for a balanced and high score.
May 0111:00 AM PDT
-12:00 PM PDT
Free- full-length test + 15 concept videos + 150+ short videos + study plan!
May 0306:30 AM PDT
-08:30 AM PDT
Verbal trouble on GMAT? Fix it NOW! Join Sunita Singhvi for a focused webinar on actionable strategies to boost your Verbal score and take your performance to the next level.
19 Oct 2018, 07:17
Kudos
Bookmarks
C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
95%
(hard)
Question Stats:
33% (01:56) correct
67%
(01:09)
wrong
based on 89
sessions
History
Date
Time
Result
Not Attempted Yet
Updated on: 19 Oct 2018, 07:56
Originally posted by DavidTutorexamPAL on 19 Oct 2018, 07:26.
Last edited by DavidTutorexamPAL on 19 Oct 2018, 07:56, edited 2 times in total.
Last edited by DavidTutorexamPAL on 19 Oct 2018, 07:56, edited 2 times in total.
Kudos
Bookmarks
GMATinsight
EDIT: corrected explanation.
Questions dealing with number properties can almost always be solved logically, with very little calculation.
We'll look for such an answer, a Logical approach.
(1) If we were told that n were an integer, than this would be sufficient, as 3 and 14 are mutually prime. Since it is not, we can manipulate things however we like. For example, choosing 3n/14 = 1, would give n/14 = 1/3, which is not an integer while choosing 3n/14 = 3 would give n/14 = 1, which is
Insufficient.
(2) this implies that n/7 is an integer which in turn implies that n is an integer divisible by 7. If n has 2 in its prime factors, then n/14 is an integer and if it does not, it is not.
Insufficient.
Combined.
From (2) we learn that n is an integer. Therefore, based on the observation that 3 and 14 are mutually prime, (1) implies that n/14 must be an integer.
Sufficient.
(C) is our answer
19 Oct 2018, 07:32
Kudos
Bookmarks
Hi David,
Here n is not given to be an integer.
Pls assume n can take the value 14/3 which makes 3 x n/14 an integer but n/14 is not an integer.
Hence statement 1 is not sufficient.
Statement 2 states that 2n/14 is an integer and hence n/7 is an integer.
n has 7 for sure but may or may not have 2. Not sufficient.
Combining, statement 1 says n has a 2 and statement 2 says n/7 is an integer and hence n/14 is an integer.
Ans: Option C.
Posted from my mobile device
Here n is not given to be an integer.
Pls assume n can take the value 14/3 which makes 3 x n/14 an integer but n/14 is not an integer.
Hence statement 1 is not sufficient.
Statement 2 states that 2n/14 is an integer and hence n/7 is an integer.
n has 7 for sure but may or may not have 2. Not sufficient.
Combining, statement 1 says n has a 2 and statement 2 says n/7 is an integer and hence n/14 is an integer.
Ans: Option C.
Posted from my mobile device
