|
|
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.
27 May 2016, 09:09
Kudos
Bookmarks
A
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
78% (00:45) correct
22%
(00:39)
wrong
based on 76
sessions
History
Date
Time
Result
Not Attempted Yet
In an isosceles triangle PQR, how many degrees is ∠ P
(1) The measurement of angle R is 100 degree.
(2) The measurement of angle Q is 40 degree.
(1) The measurement of angle R is 100 degree.
(2) The measurement of angle Q is 40 degree.
Pure algebraic questions like this one are no longer part of the GMAT Data Sufficiency syllabus.
For relevant Data Sufficiency questions, please check the Data Sufficiency forum:
Data Sufficiency Forum
Data Sufficiency Forum
27 May 2016, 09:30
Kudos
Bookmarks
Bunuel
Statement 1
This has to be the solitary angle. There cannot be 2 angles of 100 degree in a triangle.
So the two equal angles each will be 40 degrees.
Sufficient.
Statement 2
Now 40 can be one of the two equal base angles. Then angle P = 40 degrees
Or 40 can be the vertex angle. Other two angles being 70 degree each. Then angle P will be 70 degrees
Not Sufficient
Answer: Option A
28 May 2016, 20:27
Kudos
Bookmarks
In the original condition, we need to know what angles have the same degree. There is one variable, and there is high chance that D is the correct answer.
In terms of the condition 1), if R=100, p= some degree and Q=40. The answer is unique and the condition is sufficient.
In terms of the condition 2), if Q=40, both P=40 and P=50 are possible. The answer is not unique and the condition is not sufficient. Hence, the correct answer is A.
In terms of the condition 1), if R=100, p= some degree and Q=40. The answer is unique and the condition is sufficient.
In terms of the condition 2), if Q=40, both P=40 and P=50 are possible. The answer is not unique and the condition is not sufficient. Hence, the correct answer is A.
Attachments
variable approach's answer probability.jpg [ 219.74 KiB | Viewed 2766 times ]
