GMAT Question of the Day - Daily to your Mailbox; hard ones only

 It is currently 14 Dec 2019, 03:47

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

What is the value of x?

Author Message
TAGS:

Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 59724
What is the value of x?  [#permalink]

Show Tags

28 Oct 2014, 08:23
2
12
00:00

Difficulty:

45% (medium)

Question Stats:

59% (01:05) correct 41% (00:56) wrong based on 408 sessions

HideShow timer Statistics

Tough and Tricky questions: Coordinate Geometry.

Attachment:

untitled.GIF [ 2.97 KiB | Viewed 4704 times ]
What is the value of x?

(1) l1 is parallel to l2
(2) y = 70

_________________
Current Student
Status: Chasing my MBB Dream!
Joined: 29 Aug 2012
Posts: 1097
Location: United States (DC)
WE: General Management (Aerospace and Defense)
Re: What is the value of x?  [#permalink]

Show Tags

28 Oct 2014, 08:51
Statement 1: It just says about the lines l1 and l2. Nothing about the other 2 lines L3 and L4. So insufficient.

Statement 2: Says only about the angle of y. Nothing about the lines. So insufficient.

Combining (1) & (2): Still no information on lines L3 and L4.

_________________
Become a GMAT Club Premium member to unlock discounts

MBA, Class of 2020,
Director
Joined: 12 Nov 2016
Posts: 694
Location: United States
Schools: Yale '18
GMAT 1: 650 Q43 V37
GRE 1: Q157 V158
GPA: 2.66
Re: What is the value of x?  [#permalink]

Show Tags

17 Jun 2017, 09:39
Bunuel wrote:

Tough and Tricky questions: Coordinate Geometry.

Attachment:
untitled.GIF
What is the value of x?

(1) l1 is parallel to l2
(2) y = 70

Statement 1

l1 parallel to l2 - clearly insufficient because no values given or implied

Statement 2

y=70 we cannot apply transversal properties unless we know that both l1 and l2 and l3 and l4 are all parallel

insuff

Statement 1 and Statement 2

Insuff- we can only find the answer if both vertical lines are also parallel
GMAT Club Legend
Joined: 12 Sep 2015
Posts: 4151
What is the value of x?  [#permalink]

Show Tags

19 Jun 2017, 06:52
Top Contributor
2
Bunuel wrote:

Tough and Tricky questions: Coordinate Geometry.

Attachment:
untitled.GIF
What is the value of x?

(1) l1 is parallel to l2
(2) y = 70

Target question: What is the value of x?

IMPORTANT: For geometry Data Sufficiency questions, we are typically checking to see whether the statements "lock" a particular angle, length, or shape into having just one possible measurement. This concept is discussed in much greater detail in the video below.

Notice that neither statement affects the placement of line3

So, let's jump straight to....
Statements 1 and 2 combined
Consider the following two diagrams that both satisfy the conditions in statements 1 AND 2.

Notice that, each time we move line3, the value of x changes.
So, there's no way to determine (i.e., lock in) the value of x
Since we cannot answer the target question with certainty, the combined statements are NOT SUFFICIENT

RELATED VIDEOS

_________________
Test confidently with gmatprepnow.com
Non-Human User
Joined: 09 Sep 2013
Posts: 13740
Re: What is the value of x?  [#permalink]

Show Tags

16 Oct 2018, 10:42
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________
Re: What is the value of x?   [#permalink] 16 Oct 2018, 10:42
Display posts from previous: Sort by