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

 It is currently 15 Jun 2019, 21:55 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.  If each of the two lines p and q are parallel to line r , which of the

Author Message
TAGS:

Hide Tags

Math Expert V
Joined: 02 Sep 2009
Posts: 55609
If each of the two lines p and q are parallel to line r , which of the  [#permalink]

Show Tags 00:00

Difficulty:   35% (medium)

Question Stats: 55% (00:45) correct 45% (00:41) wrong based on 146 sessions

HideShow timer Statistics

If each of the two lines p and q are parallel to line r , which of the following MUST be correct?

I. Lines p, q and r lie in the same plane.
II. Lines p and q are parallel to one another.
III. Line p is the same as line q.

(A) Only I
(B) Only II
(C) Only III
(D) Only I and II
(E) Only II and III

_________________
CEO  D
Status: GMATINSIGHT Tutor
Joined: 08 Jul 2010
Posts: 2940
Location: India
GMAT: INSIGHT
Schools: Darden '21
WE: Education (Education)
Re: If each of the two lines p and q are parallel to line r , which of the  [#permalink]

Show Tags

Bunuel wrote:
If each of the two lines p and q are parallel to line r , which of the following MUST be correct?

I. Lines p, q and r lie in the same plane.
II. Lines p and q are parallel to one another.
III. Line p is the same as line q.

(A) Only I
(B) Only II
(C) Only III
(D) Only I and II
(E) Only II and III

each of the two lines p and q are parallel to line r

I. Lines p, q and r lie in the same plane. NOT NECESSARILY TRUE because p and r may be in one plane and q and r may be in other plane
II. Lines p and q are parallel to one another. MUST BE TRUE because p and r may be in one plane and q and r may be in other plane but a plane that concsists of p and q will make two lines parallel to each other
III. Line p is the same as line q. NOT NECESSARILY TRUE because p and r may be in one plane and q and r may be in other plane and p and q may not be overlapping lines

_________________
Prosper!!!
GMATinsight
Bhoopendra Singh and Dr.Sushma Jha
e-mail: info@GMATinsight.com I Call us : +91-9999687183 / 9891333772
Online One-on-One Skype based classes and Classroom Coaching in South and West Delhi
http://www.GMATinsight.com/testimonials.html

ACCESS FREE GMAT TESTS HERE:22 ONLINE FREE (FULL LENGTH) GMAT CAT (PRACTICE TESTS) LINK COLLECTION
Manager  G
Joined: 21 Jun 2017
Posts: 234
Concentration: Finance, Economics
WE: Corporate Finance (Commercial Banking)
Re: If each of the two lines p and q are parallel to line r , which of the  [#permalink]

Show Tags

Hi

chetan2u

I have a problem with st1.

Let's take plane of x and y axis. Let p and q fall in this plane and be parallel to r.

Let r fall in other plane y and z.

In order to know that r is parallel it must lie in x - y otherwise, how can we determine if that the lines are parallel ?

Posted from my mobile device
_________________
Even if it takes me 30 attempts, I am determined enough to score 740+ in my 31st attempt. This is it, this is what I have been waiting for, now is the time to get up and fight, for my life is 100% my responsibility.

Dil ye Ziddi hai !!!
Intern  B
Joined: 30 May 2018
Posts: 7
Re: If each of the two lines p and q are parallel to line r , which of the  [#permalink]

Show Tags

Hi Bunuel,

Can you please explain why 'I' is correct? I am little confused. Even I agree that the lines should be in the same plane in order to be parallel.
Intern  B
Joined: 04 Nov 2017
Posts: 11
Re: If each of the two lines p and q are parallel to line r , which of the  [#permalink]

Show Tags

Hi,

I am confused by the wording of this question. Does "I. Lines p, q and r lie in the same plane." mean same quadrant here?

/Usman
Manager  B
Joined: 15 Aug 2018
Posts: 51
GMAT 1: 740 Q47 V45 GPA: 3.5
Re: If each of the two lines p and q are parallel to line r , which of the  [#permalink]

Show Tags

GMATinsight wrote:
Bunuel wrote:
If each of the two lines p and q are parallel to line r , which of the following MUST be correct?

I. Lines p, q and r lie in the same plane.
II. Lines p and q are parallel to one another.
III. Line p is the same as line q.

(A) Only I
(B) Only II
(C) Only III
(D) Only I and II
(E) Only II and III

each of the two lines p and q are parallel to line r

I. Lines p, q and r lie in the same plane. NOT NECESSARILY TRUE because p and r may be in one plane and q and r may be in other plane
II. Lines p and q are parallel to one another. MUST BE TRUE because p and r may be in one plane and q and r may be in other plane but a plane that concsists of p and q will make two lines parallel to each other
III. Line p is the same as line q. NOT NECESSARILY TRUE because p and r may be in one plane and q and r may be in other plane and p and q may not be overlapping lines

so just to get this right... by plane you mean quadrant? if so, that would not make sense right? if we are talking about a 3 dimensional coordinate system, I would also be confused. to wrap it up: I am confused. May you elaborate GMATinsight
_________________
A kudo a day...
Intern  B
Joined: 04 Nov 2017
Posts: 11
Re: If each of the two lines p and q are parallel to line r , which of the  [#permalink]

Show Tags

ok so the context of plane is 2-D and 3-D plane and not quadrant. Thanks for clarification. Re: If each of the two lines p and q are parallel to line r , which of the   [#permalink] 09 Dec 2018, 13:06
Display posts from previous: Sort by

If each of the two lines p and q are parallel to line r , which of the   