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02 Aug 2018, 01:33
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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:
25%
(medium)
Question Stats:
63% (00:53) correct
37%
(00:58)
wrong
based on 155
sessions
History
Date
Time
Result
Not Attempted Yet
Is ABCD a rectangle?
(1) ∠ADC = 90°
(2) AD = BC
Attachment:
GMAT_DS_Magoosh_157.png [ 1009 Bytes | Viewed 5144 times ]
02 Aug 2018, 02:29
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(1) ∠ADC = 90°
No information about sides, and other angle
Insufficient
(2) AD = BC
No information about other sides, and angles
Insufficient
Combining both :
Not much information to conclude that it is a rectangle
Insufficient
Hence, E.
No information about sides, and other angle
Insufficient
(2) AD = BC
No information about other sides, and angles
Insufficient
Combining both :
Not much information to conclude that it is a rectangle
Insufficient
Hence, E.
02 Aug 2018, 02:30
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Insufficient. Even if angle ADC=90º and AD=BC, angle DCB can take any value.
Attachments
not_square.PNG [ 4.13 KiB | Viewed 4753 times ]
