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20 Jul 2019, 02:19
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C
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:
68% (00:26) correct
32%
(00:27)
wrong
based on 91
sessions
History
Date
Time
Result
Not Attempted Yet
Is quadrilateral ABCD a square?
(1) ABCD is a rhombus.
(2) ABCD is a rectangle.
(1) ABCD is a rhombus.
(2) ABCD is a rectangle.
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
firas92
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Last visit: 24 Jul 2026
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23 Jul 2019, 00:14
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(1) ABCD is a rhombus.
Tells us that all sides are equal but we do not know the same about angles
Insufficient
(2) ABCD is a rectangle.
Tells us that all angles are 90 degrees but nothing about side lengths
Insufficient
(1)+(2)
All sides are equal and all angles are 90 degrees. ABCD is a square
Sufficient
Answer is (C)
Tells us that all sides are equal but we do not know the same about angles
Insufficient
(2) ABCD is a rectangle.
Tells us that all angles are 90 degrees but nothing about side lengths
Insufficient
(1)+(2)
All sides are equal and all angles are 90 degrees. ABCD is a square
Sufficient
Answer is (C)
saurabh9gupta
Joined: 10 Jan 2013
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23 Jul 2019, 00:54
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So the best way to do this question is to understand the below concept
All squares are rhombus but not vice versa.
All squares are rectangles but not vice versa.
If a quadrilateral is both a rhombus and a rectangle, then it is a square.
Posted from my mobile device
All squares are rhombus but not vice versa.
All squares are rectangles but not vice versa.
If a quadrilateral is both a rhombus and a rectangle, then it is a square.
Posted from my mobile device
