Triangle DS Problem

Expert replies

mlaboda: Junior | Next Rank: 30 Posts; Posts: 25; Joined: Sun Jan 25, 2009 2:34 pm; Thanked: 1 times

by mlaboda » Sun Nov 22, 2009 6:29 pm

Thank you for helping me understand this problem!

In the attached figure, the measure of angle PRS is how many degrees greater than the measure of angle PQR?

1. The measure of angle QPR is 30 degrees.
2. 2. The sum of the measures of angles PQR and PRQ is 150 degrees.

Ans. D

Attachments

Triangle.pdf: (5.41 KiB) Downloaded 160 times

Like this post

Source: Beat The GMAT — Data Sufficiency | Sun Nov 22, 2009 6:29 pm

ershovici: Senior | Next Rank: 100 Posts; Posts: 91; Joined: Tue Aug 25, 2009 7:50 am; Location: Washington DC; Thanked: 2 times; GMAT Score:600

by ershovici » Mon Nov 23, 2009 1:33 am

let agnle PQR is Y, angle PRS is X, we need to find X-Y
ST 1. given taht QPR is 30 degrees, we can make equotion to calculate angle RPS
180 - Y - 30 - 90=180-X-90
-Y-30=-X
-X+Y=-30
X-Y=30

ST 2. given that PQR+PRQ=150 degrees, we find that QPR = 30, the same as for ST1.

So D is the answer.

Like this post

Post new topic Post Reply

• Page 1 of 1

GMAT Course Reviews

560 reviews

1168 reviews

431 reviews

359 reviews

147 reviews

5/5

5 Star (560 Reviews)

"Target Test Prep is the closest to the official version of the GMAT exam, about 99% accuracy in terms of the quality and quantity of information. The course has excellently created singular sets of focused lessons and tests for every possible topic that one could come across in the official GMAT exam."

"The TTP course maximizes the efficiency of the time you spend studying. It will take time and effort but I could almost guarantee that if you complete the course exactly as it is laid out you will get an amazing score. They also have a very responsive team willing to help with any questions you might have."

"TTP has two things that I think no other test prep company offers: A teaching approach that reinforces understanding and an attitude that will give you the mental preparedness needed to succeed on the test. TTP gives you a deep understanding of the concept you need to know while teaching you how to think."

Write a Review