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17 Aug 2016, 01:54
Kudos
Bookmarks
E
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:
56% (00:40) correct
44%
(00:38)
wrong
based on 266
sessions
History
Date
Time
Result
Not Attempted Yet
In the figure above, what is the length of RT?
(1) RU = 5
(2) RS = 12
Attachment:
2016-08-17_1252.png [ 2.66 KiB | Viewed 9139 times ]
06 Sep 2016, 15:39
Kudos
Bookmarks
Bunuel
For geometry Data Sufficiency questions, we are typically checking to see whether the statements "lock" a particular angle, length, or shape into having just one possible measurement. This concept is discussed in much greater detail in the following video: https://www.gmatprepnow.com/module/gmat-geometry/video/884
This technique can save a lot of time.
Target question: What is the length of RT?
So, we want to find the length of the blue line (below)
It's probably apparent to you that statements 1 and 2 ALONE are not sufficient, so let's jump straight to....
Statements 1 and 2 combined
Statement 1 tells us that RU = 5
Statement 2 tells us that RS = 12
So, we have the following....
Does this LOCK IN the length of the blue line?
No.
We can MENTALLY GRAB vertex T and move it here....
or here....
...etc.
Notice, although these diagrams satisfy both statements, the length of the blue line is not locked into a certain value.
As such, the combined statements are NOT SUFFICIENT
Answer =
RELATED VIDEO
Cheers,
Brent
General Discussion
17 Aug 2016, 02:23
Kudos
Bookmarks
Bunuel
Stat 1: we can't infer any value
Stat 2: we can't get relation using this.
Stat 1 + Stat 2: we have 5 and 12 . Then we can remember the triplets i.e. 5,12 and 13 and it is right angle triangle then hyp is 13...this is only sufficient if the given figure is rectangle..but such information is not given..
IMO option E is correct answer..
OA please...will correct if I missed anything..
