Events & Promotions
|
|
GMAT Club Daily Prep
Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.
Customized
for You
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Apr 2512:30 AM EDT
-01:30 AM EDT
At one point, she believed GMAT wasn’t for her. After scoring 595, self-doubt crept in and she questioned her potential. But instead of quitting, she made the right strategic changes. The result? A remarkable comeback to 695. Check out how Saakshi did it.
Apr 2601:30 AM EDT
-02:30 AM EDT
Learn how Keshav, a Chartered Accountant, scored an impressive 705 on GMAT in just 30 days with GMATWhiz's expert guidance. In this video, he shares preparation tips and strategies that worked for him, including the mock, time management, and more.
Apr 2610:00 AM EDT
-11:00 AM EDT
The Target Test Prep course represents a quantum leap forward in GMAT preparation, a radical reinterpretation of the way that students should study. Try before you buy with a 5-day, full-access trial of the course for FREE!
Apr 2711:00 AM EDT
-12:00 PM EDT
Prefer video-based learning? The Target Test Prep OnDemand course is a one-of-a-kind video masterclass featuring 400 hours of lecture-style teaching by Scott Woodbury-Stewart, founder of Target Test Prep and one of the most accomplished GMAT instructors
Apr 2808:00 AM PDT
-11:00 AM PDT
Whether you are just beginning your MBA journey or fine-tuning your path to a 700+ score, GMAT Day is designed to give you a competitive edge.
May 0111:00 AM PDT
-12:00 PM PDT
Free- full-length test + 15 concept videos + 150+ short videos + study plan!
14 Aug 2019, 01:30
Kudos
Bookmarks
C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
5%
(low)
Question Stats:
80% (00:33) correct
20%
(00:31)
wrong
based on 94
sessions
History
Date
Time
Result
Not Attempted Yet
In the xy-plane above, is angle QPR a right angle?
(1) Line segment PQ is perpendicular to the x-axis.
(2) Line segment PR is perpendicular to the y-axis.
Attachment:
image033.png [ 17.63 KiB | Viewed 2674 times ]
19 Aug 2019, 03:07
Kudos
Bookmarks
Bunuel
In the xy-plane above, is angle QPR a right angle?
(1) Line segment PQ is perpendicular to the x-axis.
=> PQ is parallel to y-axis
Since nothing is known about PR.
NOT SUFFICIENT
(2) Line segment PR is perpendicular to the y-axis.
=> PR is parallel to x-axis
Since nothing is known about PQ.
NOT SUFFICIENT
Combining (1) & (2)
(1) Line segment PQ is perpendicular to the x-axis.
=> PQ is parallel to y-axis
(2) Line segment PR is perpendicular to the y-axis.
=> PR is parallel to x-axis
Both line PQ and PR are perpendicular to each other
=> angle QPR a right angle
SUFFICIENT
IMO C
10 Sep 2019, 01:51
Kudos
Bookmarks
Bunuel
Official Explanation
We're asked whether angle QPR is a right angle, a 90-degree angle. It looks like one, but that doesn't matter. If there is not a little box symbol in the corner of the angle QPR, then it's a right angle only if we can infer as much from other information. Note, however, that we are told that the angle exists in an "xy plane." We can conclude from that statement that the x-axis and the y-axis are perpendicular--that the angle between them is a right angle. We immediately recall having ever seen a question in which the coordinate plane was not regular in that way; a question could present you with that, but it would be very careful to let you know that the coordinate plane was irregular. These conventions can seem a bit arbitrary, but there aren't too many of them, so with a little practice, you won't risk misunderstanding the testmaker's language.
On to the statements, which, you guessed it, we will evaluate separately first. Statement (1) gives a good piece of information--it's saying that the vertical line of the triangle is parallel to the y-axis, as it appears to be. But we still don't know whether the angle QPR is a right angle, because, for all we know, the horizontal line might be a degree or two tilted away from flat. So the first statement is insufficient. The second statement is insufficient by the same logic. If we combine the statements, we know that the two sides of the triangle are parallel to the coordinate axes, so they are perpendicular to each other, so they form a right angle.
The correct answer is (C).
