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 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.
D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
65%
(hard)
Question Stats:
38% (01:47) correct
62%
(01:49)
wrong
based on 26
sessions
History
Date
Time
Result
Not Attempted Yet
Attachment:
quant_ds_00000022.jpg
In the figure above, ST=3. What is the length of RS?(1) \(PS = 3\sqrt{3}\)
(2) PT = 6
This Question is Locked Due to Poor Quality
Hi there,
The question you've reached has been archived due to not meeting our community quality standards. No more replies are possible here.
Looking for better-quality questions? Check out the 'Similar Questions' block below
for a list of similar but high-quality questions.
Want to join other relevant Problem Solving discussions? Visit our Data Sufficiency (DS) Forum
for the most recent and top-quality discussions.
Thank you for understanding, and happy exploring!
26 Feb 2015, 11:55
Kudos
Bookmarks
Awli
Dear Awli,
My friend, something seems amiss with this problem.
In its current form, we are given no information about angle RPT. You see, a very typical trick on the real GMAT is for the test maker to draw an angle in a DS diagram that appears right, and tempts us into believing that it is in fact a right angle, despite any evidence.
If we were explicitly guaranteed that angle RPT = 90 degrees, then we would have a diagram with three similar triangles and a host of interrelationship:
(triangle RPT) ~ (triangle RSP) ~ (triangle PST)
That would give us a ton of ratios, and having any two lengths in the diagram would be enough to find every other length. That would lead to the answer of (D), which you cite here.
By contrast, the version you give here, we know zilch about the angle at P, so even with both statements, we can find everything about the triangle on the right, right triangle PST, but we could slide point R in and out, adjusting the lengths of RS & RP to whatever we like --- there would be nothing at all determining that side of the triangle. Technically, in the form you have stated the problem here, the answer would be (E).
Now, it may be in copying the diagram, that you left out the "perpendicular square" at the top of the triangle. That's an absolute crucial piece of information, and without it, the problem is very different. I would suggest looking again at the source. BTW, please let us know the source of this question.
Does all this make sense?
Mike
26 Feb 2015, 12:51
Kudos
Bookmarks
Hi Awli,
Mike is correct. For the given answer to be correct, we would need to KNOW that Angle P is a 90-degree angle (and by extension, that triangle RPT is a right triangle). We cannot deduce that it's a 90-degree angle from the drawing, so we need some type of "proof" that it's a 90 (a text description or the 90-degree "box" symbol drawn into the picture).
GMAT assassins aren't born, they're made,
Rich
Mike is correct. For the given answer to be correct, we would need to KNOW that Angle P is a 90-degree angle (and by extension, that triangle RPT is a right triangle). We cannot deduce that it's a 90-degree angle from the drawing, so we need some type of "proof" that it's a 90 (a text description or the 90-degree "box" symbol drawn into the picture).
GMAT assassins aren't born, they're made,
Rich
