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12 Sep 2018, 00:45
Kudos
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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:
67% (01:27) correct
33%
(00:53)
wrong
based on 57
sessions
History
Date
Time
Result
Not Attempted Yet
If P and Q are circular regions, what is the radius of the smaller of these regions?
(1) The sum of the radii of the two regions is 20.
(2) The circumference of the larger circle is equal to 40π minus the circumference of the smaller circle.
(1) The sum of the radii of the two regions is 20.
(2) The circumference of the larger circle is equal to 40π minus the circumference of the smaller circle.
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
12 Sep 2018, 04:52
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Bunuel
Question: If P and Q are circular regions, what is the radius of the smaller of these regions?
To answer this question we only need the radius of the smaller circle of these two .
Statement 1: The sum of the radii of the two regions is 20
Smaller radius can be anything less than 10 hence no specific value for the smaller radius hence
NOT SUFFICIENT
Statement 2: The circumference of the larger circle is equal to 40π minus the circumference of the smaller circle.
2πR = 40π - 2πr
i.e. R+r = 20
NOT SUFFICIENT
Combining the two statements
Both statements are giving us the same information hence no further deduction after combining them hence
NOT SUFFICIENT
Answer: option E
03 Oct 2019, 08:29
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