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Updated on: 01 Feb 2016, 09:34
Originally posted by dlimanto on 01 Feb 2016, 09:28.
Last edited by ENGRTOMBA2018 on 01 Feb 2016, 09:34, edited 1 time in total.
Last edited by ENGRTOMBA2018 on 01 Feb 2016, 09:34, edited 1 time in total.
Formatted the question, added the OA and updated the title.
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D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
35%
(medium)
Question Stats:
65% (00:52) correct
35%
(01:31)
wrong
based on 20
sessions
History
Date
Time
Result
Not Attempted Yet
What is the length of RT in triangle RST with RS=12 and ST=4?
(1) Perimeter of RST = 44
(2) RT is multiple of 7
(1) Perimeter of RST = 44
(2) RT is multiple of 7
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This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
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ENGRTOMBA2018
Joined: 20 Mar 2014
Last visit: 01 Dec 2021
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Concentration: Finance, Strategy
Schools: Kellogg '18 (M)
GMAT 1: 750 Q49 V44
GPA: 3.7
WE:Engineering (Aerospace and Defense)
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01 Feb 2016, 09:41
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dlimanto
Follow posting guidelines (link in my signatures). Make sure to post the official answer (OA) everytime you post a new question.
As for the question, you are given that in triangle RST, RS=12, ST=4, RT=x=?
Per statement 1, perimeter = 44 . RT+RS+ST=44 ---> x+16=44 ---> x = 28. Sufficient. But this does not make sense. As per the property of triangles, 3rd side in a triangle must always lie between the positive difference of the other 2 sides and the sum of the other 2 sides --> |a-b|<c<a+b ---> 12-4 <x < 12+4 --> 8<x<16. Thus 28 can not be an allowed value.
Per statement 2, x=7p.
Using the concept mentioned in statement 1, |a-b|<c<a+b ---> 8< 7p < 16 , the only multiple of 7 between 8 and 16 is 14. Thus x=14. Sufficient.
D is thus the correct answer.
Another issue here: in GMAT DS, if both the statements are sufficient on their own, then both of them MUST give the same unique value. In this case, you are getting 2 different values for 2 individually sufficient statements. This is not allowed.
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!
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