Find all School-related info fast with the new School-Specific MBA Forum

It is currently 02 Aug 2015, 14:55
GMAT Club Tests

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.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

What is x? (1) |x| < 2 (2) |x| = 3x 2

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
Director
Director
avatar
Joined: 23 Sep 2007
Posts: 791
Followers: 5

Kudos [?]: 110 [0], given: 0

What is x? (1) |x| < 2 (2) |x| = 3x 2 [#permalink] New post 21 Jun 2008, 13:44
1
This post was
BOOKMARKED
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

What is x?

(1) |x| < 2

(2) |x| = 3x – 2
Senior Manager
Senior Manager
avatar
Joined: 06 Mar 2006
Posts: 497
Followers: 7

Kudos [?]: 97 [0], given: 1

Re: mgmat: what is x? [#permalink] New post 21 Jun 2008, 19:04
gmatnub wrote:
What is x?

(1) |x| < 2

(2) |x| = 3x – 2


Statement 1, -2<x<2 no specific value for x; therefore, insufficient
Statement 2, x=1 or 1/2 no specific value for x; therefore, insufficient
Together, still cannot find a single value, insufficient
Answer should be E
Manager
Manager
avatar
Joined: 21 Mar 2008
Posts: 244
Followers: 2

Kudos [?]: 21 [0], given: 0

Re: mgmat: what is x? [#permalink] New post 21 Jun 2008, 21:32
gmatnub wrote:
What is x?

(1) |x| < 2

(2) |x| = 3x – 2


B

x>0, x = 3x-2 =>x = 1
x<0, x = -(3x-2) => x = 1/2, no soln.

so x = 1.
Current Student
avatar
Joined: 28 Dec 2004
Posts: 3387
Location: New York City
Schools: Wharton'11 HBS'12
Followers: 14

Kudos [?]: 192 [0], given: 2

Re: mgmat: what is x? [#permalink] New post 22 Jun 2008, 05:12
i will get B..

|x|=3x-2

x>0

x-3x=-2
-2x=-2 x=1

if x<0
-x-3x=-2
-4x=-2
x=1/2 <-- cant be since x<0...

x=1
Intern
Intern
avatar
Joined: 18 Feb 2008
Posts: 29
Followers: 0

Kudos [?]: 0 [0], given: 0

Re: mgmat: what is x? [#permalink] New post 22 Jun 2008, 05:39
I did not understand you explanation completely .....
I think the ans should be E.
Statement 1 - -2<x<2
Statement 2 - x=1 or x=1/2

Both the statements together will still not give a unique ans ...... hence E
Manager
Manager
User avatar
Joined: 22 Jun 2008
Posts: 101
Followers: 3

Kudos [?]: 44 [0], given: 0

Re: mgmat: what is x? [#permalink] New post 22 Jun 2008, 06:18
gmatnub wrote:
What is x?

(1) |x| < 2

(2) |x| = 3x – 2



From 1) x can by many...insuf

From 2) x can be either 1 or 1/2..insuf

Both x can be either 1 or 1/2. so Insuf. E is the answer.

Last edited by clubzzang on 22 Jun 2008, 07:25, edited 1 time in total.
Manager
Manager
User avatar
Joined: 13 Apr 2008
Posts: 66
Followers: 1

Kudos [?]: 4 [0], given: 0

Re: mgmat: what is x? [#permalink] New post 22 Jun 2008, 06:19
IMO E,
coz x could be 1/2 or 1.
Manager
Manager
avatar
Joined: 21 Mar 2008
Posts: 244
Followers: 2

Kudos [?]: 21 [0], given: 0

Re: mgmat: what is x? [#permalink] New post 22 Jun 2008, 10:17
X cannot be 1/2 as u r assuming x<0 for that condition ...its not a solution...
Intern
Intern
avatar
Joined: 18 Feb 2008
Posts: 29
Followers: 0

Kudos [?]: 0 [0], given: 0

Re: mgmat: what is x? [#permalink] New post 22 Jun 2008, 17:50
I still don't quite understand the explanation......
When we equate for x<0, its just a substitution and any value we get from it is the ans .... irrespective of whether its +ve or -ve
Senior Manager
Senior Manager
User avatar
Joined: 07 Jan 2008
Posts: 418
Followers: 3

Kudos [?]: 108 [0], given: 0

Re: mgmat: what is x? [#permalink] New post 22 Jun 2008, 23:54
1: NOT SUF
2:
x<0 ==> x=1/2: Controversially
x>0 ==> x=1: OK
x=0 ==> 2=0: Controversially

So 2 is Suf.

B must be correct.
Intern
Intern
avatar
Joined: 12 Mar 2008
Posts: 23
Followers: 0

Kudos [?]: 4 [0], given: 0

Re: mgmat: what is x? [#permalink] New post 23 Jun 2008, 10:11
X can be a fraction or integer, question does not say anything about "x"...

Ans should E.
CEO
CEO
User avatar
Joined: 29 Mar 2007
Posts: 2585
Followers: 17

Kudos [?]: 248 [0], given: 0

Re: mgmat: what is x? [#permalink] New post 23 Jun 2008, 10:15
gmatnub wrote:
What is x?

(1) |x| < 2

(2) |x| = 3x – 2



B.


X=3x-2 ---> x=1

Or

-x=3x-2 --> x=1/2

But 1/2= 3/2-2??? No!!!
Manager
Manager
avatar
Joined: 14 May 2008
Posts: 71
Followers: 1

Kudos [?]: 44 [0], given: 0

Re: mgmat: what is x? [#permalink] New post 23 Jun 2008, 10:33
It should be B!
What is OA?
Intern
Intern
avatar
Joined: 20 Jun 2008
Posts: 22
Followers: 0

Kudos [?]: 0 [0], given: 0

Re: mgmat: what is x? [#permalink] New post 23 Jun 2008, 12:17
if x=1/2 were a solution then it would satify the equation.right?
Then why dont you check whether it satifies the eqn?


saurabhkowley18 wrote:
I still don't quite understand the explanation......
When we equate for x<0, its just a substitution and any value we get from it is the ans .... irrespective of whether its +ve or -ve
Current Student
User avatar
Joined: 12 Jun 2008
Posts: 287
Schools: INSEAD Class of July '10
Followers: 6

Kudos [?]: 41 [0], given: 0

Re: mgmat: what is x? [#permalink] New post 24 Jun 2008, 00:27
rajesh04 wrote:
X can be a fraction or integer, question does not say anything about "x"...

Ans should E.

Nope. 1 is the only number (integer, fraction, anything) that satisfies equation (2).

Answer is therefore (B)
Director
Director
avatar
Joined: 23 Sep 2007
Posts: 791
Followers: 5

Kudos [?]: 110 [0], given: 0

Re: mgmat: what is x? [#permalink] New post 24 Jun 2008, 08:30
The official answer is B.
Re: mgmat: what is x?   [#permalink] 24 Jun 2008, 08:30
Display posts from previous: Sort by

What is x? (1) |x| < 2 (2) |x| = 3x 2

  Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Privacy Policy| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group and phpBB SEO

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.