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22 Oct 2017, 06:41
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A
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:
74% (01:31) correct
26%
(01:32)
wrong
based on 70
sessions
History
Date
Time
Result
Not Attempted Yet
Is the line PQ parallel to the line SR?
(1) w = q
(2) y = z
Attachment:
2017-10-22_1739.png [ 13.3 KiB | Viewed 4304 times ]
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
23 Oct 2017, 04:45
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Bunuel
Is line PQ parallel to line SR? That is, is x = z?
Statement 1:
w = q
From the triangle PQR, x + q + y = 180 => x = 180 - q - y
z + w + y = 180 => z = 180 - w - y = 180 - q - y
Therefore, z = x
Lines PQ and SR are parallel.
Statement 1 is sufficient.
Statement 2:
y = z
x = 180 - q - y = 180 - q - z
But, this statement is not sufficient to know whether x = z
Therefore, answer is A.
23 Oct 2017, 04:50
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IMO Option A
Using first statement w=q alternate interior angles are equal. So lines are parallel.
Second statement does not give us a condition for satisfying parallel lines So B not sufficient.
Please give me kudos. I need them to unlock gmatclubtests
Using first statement w=q alternate interior angles are equal. So lines are parallel.
Second statement does not give us a condition for satisfying parallel lines So B not sufficient.
Please give me kudos. I need them to unlock gmatclubtests
