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03 Jul 2018, 11:06
Kudos
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C
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Difficulty:
85%
(hard)
Question Stats:
28% (01:38) correct
72%
(01:18)
wrong
based on 68
sessions
History
Date
Time
Result
Not Attempted Yet
Do the two circles with centers X and Y touch each other externally?
(1) The distance between X and Y is equal to the diameter of the circle with center X.
(2) One circle is bigger than the other.
(1) The distance between X and Y is equal to the diameter of the circle with center X.
(2) One circle is bigger than the other.
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
04 Jul 2018, 00:43
Kudos
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Bunuel
(1) The distance between X and Y is equal to the diameter of the circle with center X.
so radius of X is half of the distance between x and y..
if radius of y = radius of x, the two circles will touch each other as shown by blue circles in att figure
otherwise ans is NO
We do not know about x
insuff
(2) One circle is bigger than the other
they could still meet if distance between centers = sum of radius
insuff
combined
they will not meet
sufficient
C
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