Last visit was: 03 May 2026, 13:44 It is currently 03 May 2026, 13:44
Home
Messages
Tests
Schools
Events
Close
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
Your Progress

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.
Go to My Error Log Learn more
Close
Request Expert Reply
Confirm Cancel
Back to Forum
Create Topic
505-555 (Easy)|   Geometry|      
User avatar
Bunuel
User avatar
Math Expert
Joined: 02 Sep 2009
Last visit: 03 May 2026
Posts: 110,029
Own Kudos:
812,717
 [8]
Given Kudos: 105,994
Products:
GMAT Club Tests Forum Quiz
Expert
Expert reply
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
Posts: 110,029
Kudos: 812,717
 [8]
If l || l2 in the figure to the right, what is the value of x? 17 Jun 2017, 06:41
1
Kudos
Add Kudos
7
Bookmarks
Bookmark this Post
00:00
Start Timer
Pause Timer
Resume Timer
Show Answer
Hide
Show
History
C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!

Difficulty:

15% (low)

Question Stats:

75% (00:45) correct 25% (01:00) wrong based on 198 sessions

History

Date
Time
Result
Not Attempted Yet
If l || l2 in the figure to the right, what is the value of x?



(A) 30
(B) 45
(C) 60
(D) 72
(E) 90


Show Spoiler
Attachment:
2017-06-17_1738.png
2017-06-17_1738.png [ 7.21 KiB | Viewed 7852 times ]
ShowHide Answer
Official Answer
C
avatar
pulkitaggi
avatar
Joined: 02 Mar 2017
Last visit: 14 Aug 2017
Posts: 61
Own Kudos:
163
 [1]
Given Kudos: 35
GMAT 1: 700 Q51 V34
GMAT 1: 700 Q51 V34
Posts: 61
Kudos: 163
 [1]
If l || l2 in the figure to the right, what is the value of x? 17 Jun 2017, 06:47
1
Kudos
Add Kudos
Bookmarks
Bookmark this Post
IMO answer is C.

6x =360, hence x=60
User avatar
pushpitkc
User avatar
Joined: 26 Feb 2016
Last visit: 19 Feb 2025
Posts: 2,800
Own Kudos:
6,241
 [1]
Given Kudos: 47
Location: India
GPA: 3.12
Posts: 2,800
Kudos: 6,241
 [1]
If l || l2 in the figure to the right, what is the value of x? 17 Jun 2017, 06:53
1
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Since l1 is parallel to l2, angles x=c(corresponding angles)
Also, 5x + c = 360 (angle around any point totals 360)

Since x=c,
6x = 360 => x = 60 degree(Option C)
User avatar
BrentGMATPrepNow
User avatar
Major Poster
Joined: 12 Sep 2015
Last visit: 31 Oct 2025
Posts: 6,733
Own Kudos:
36,511
 [4]
Given Kudos: 799
Location: Canada
Expert
Expert reply
Posts: 6,733
Kudos: 36,511
 [4]
If l || l2 in the figure to the right, what is the value of x? Updated on: 29 Apr 2021, 13:46
Originally posted by BrentGMATPrepNow on 17 Jun 2017, 08:26.
Last edited by BrentGMATPrepNow on 29 Apr 2021, 13:46, edited 1 time in total.
2
Kudos
Add Kudos
2
Bookmarks
Bookmark this Post
Bunuel
If l1 || l2 in the figure to the right, what is the value of x?



(A) 30
(B) 45
(C) 60
(D) 72
(E) 90


Show Spoiler
Attachment:
2017-06-17_1738.png
Show more

We know that 5x + s = 360 degrees (angles around a point add to 360)

If l1 and l2 are parallel, then angle s = angle x

So, we can take 5x + s = 360 and replace s with x to get: 5x + x = 360
Simplify: 6x = 360
Solve: x = 60

Answer: C

RELATED VIDEO
User avatar
Abhishek009
User avatar
Board of Directors
Joined: 11 Jun 2011
Last visit: 17 Dec 2025
Posts: 5,902
Own Kudos:
5,460
Given Kudos: 463
Status:QA & VA Forum Moderator
Location: India
GPA: 3.5
WE:Business Development (Commercial Banking)
Posts: 5,902
Kudos: 5,460
If l || l2 in the figure to the right, what is the value of x? 17 Jun 2017, 08:32
Kudos
Add Kudos
Bookmarks
Bookmark this Post
5x + x = 360

So, 6x = 360

Or, x = 60

Thus, answer must be (C)
User avatar
longhaul123
User avatar
Joined: 03 Jul 2017
Last visit: 11 Nov 2018
Posts: 138
Own Kudos:
37
Given Kudos: 27
Status:IF YOU CAN DREAM IT, YOU CAN DO IT
Location: India
Concentration: Finance, International Business
Posts: 138
Kudos: 37
If l || l2 in the figure to the right, what is the value of x? 17 Jul 2017, 11:25
Kudos
Add Kudos
Bookmarks
Bookmark this Post
I thought 5x=x because they are alternate exterior angles. Aren't they??
User avatar
generis
User avatar
Senior SC Moderator
Joined: 22 May 2016
Last visit: 18 Jun 2022
Posts: 5,258
Own Kudos:
37,752
Given Kudos: 9,464
Expert
Expert reply
Posts: 5,258
Kudos: 37,752
If l || l2 in the figure to the right, what is the value of x? 17 Jul 2017, 12:23
Kudos
Add Kudos
Bookmarks
Bookmark this Post
longhaul123
I thought 5x=x because they are alternate exterior angles. Aren't they??
Show more
5x refers to the circle with arrows at both ends. That circle indicates an angle that is NOT acute like x.

5x means "this much of the 360° around this point (that also contains angle S) has a measure of 5x."

s and x are corresponding angles. Not sure how you're getting 5x as an alternate exterior angle.
User avatar
bumpbot
User avatar
Non-Human User
Joined: 09 Sep 2013
Last visit: 04 Jan 2021
Posts: 39,017
Own Kudos:
1,122
Posts: 39,017
Kudos: 1,122
If l || l2 in the figure to the right, what is the value of x? 31 Mar 2024, 06:10
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Automated notice from GMAT Club BumpBot:

A member just gave Kudos to this thread, showing it’s still useful. I’ve bumped it to the top so more people can benefit. Feel free to add your own questions or solutions.

This post was generated automatically.
Moderators:
Bunuel
Math Expert
110029 posts
Krunaal
Tuck School Moderator
852 posts