 It is currently 17 Jun 2019, 22:39 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

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here. GRE Math Challenge #20- Geometry Triangle a + b or c + d  Question banks Downloads My Bookmarks Reviews Important topics
Author Message
TAGS:
GRE Prep Club Legend  Joined: 07 Jun 2014
Posts: 4810
GRE 1: Q167 V156 WE: Business Development (Energy and Utilities)
Followers: 117

Kudos [?]: 1895 , given: 397

GRE Math Challenge #20- Geometry Triangle a + b or c + d [#permalink]
Expert's post 00:00

Question Stats: 66% (01:14) correct 33% (01:38) wrong based on 15 sessions Quantity A: a + b
Quantity B: c + d

A)The quantity in Column A is greater
B)The quantity in Column B is greater
C)Both are Equal.
D)The relationship cannot be determined from the information given
[Reveal] Spoiler: OA

Attachments figure 16.jpg [ 13.88 KiB | Viewed 2414 times ]

_________________

Sandy
If you found this post useful, please let me know by pressing the Kudos Button

Try our free Online GRE Test

GRE Instructor Joined: 10 Apr 2015
Posts: 1968
Followers: 60

Kudos [?]: 1797 , given: 9

Re: GRE Math Challenge #20- Geometry Triangle a + b or c + d [#permalink]
Expert's post
sandy wrote: Quantity A: a + b
Quantity B: c + d

A)The quantity in Column A is greater
B)The quantity in Column B is greater
C)Both are Equal.
D)The relationship cannot be determined from the information given

Let's let x = the 3rd angle in the left-side triangle (with angles a and b)

Since angles in a triangle must add to 180 degrees, we can write: a + b + x = 180
Also, notice that angles x and d are on the same line. As such, they must add to 180 degrees. So, we can write: d + x = 180

Since, both equations are set equal to 180, we can write: a + b + x = d + x
Subtract x from both sides to get: a + b = d

Given:
Quantity A: a + b
Quantity B: c + d

Replace a + b with d to get:
Quantity A: d
Quantity B: c + d

Subtract d from both quantities to get:
Quantity A: 0
Quantity B: c

On the GRE, we can assume that all angles in a diagram are greater than 0 degrees.

So, it must be the case that quantity B is greater.

Cheers,
Brent
_________________

Brent Hanneson – Creator of greenlighttestprep.com  Re: GRE Math Challenge #20- Geometry Triangle a + b or c + d   [#permalink] 16 Dec 2017, 06:53
Display posts from previous: Sort by

GRE Math Challenge #20- Geometry Triangle a + b or c + d  Question banks Downloads My Bookmarks Reviews Important topics  Powered by phpBB © phpBB Group Kindly note that the GRE® test is a registered trademark of the Educational Testing Service®, and this site has neither been reviewed nor endorsed by ETS®.