It is currently 22 Sep 2017, 08:26

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.

Close

Request Expert Reply

Confirm Cancel

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

Square root of (x-5

  post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
Senior Manager
Senior Manager
avatar
Joined: 20 Feb 2008
Posts: 295

Kudos [?]: 49 [0], given: 0

Location: Bangalore, India
Schools: R1:Cornell, Yale, NYU. R2: Haas, MIT, Ross
Square root of (x-5 [#permalink]

Show Tags

New post 01 Dec 2008, 11:27
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Hey,
Cant seem to figure this one out.
Your help would be greatly appreciated!
Attachment:
GMATPrepTest 2.doc [104.5 KiB]
Downloaded 78 times
To download please login or register as a user

Kudos [?]: 49 [0], given: 0

SVP
SVP
User avatar
Joined: 30 Apr 2008
Posts: 1870

Kudos [?]: 607 [0], given: 32

Location: Oklahoma City
Schools: Hard Knocks
Re: GMAT Prep Test 2 [#permalink]

Show Tags

New post 01 Dec 2008, 11:32
Just to help you get more replies, here is the question not in attachment form:

Is \(\sqrt{(x-5)^2} = 5 - x\) ?

(1) -x|x| > 0

(2) 5-x > 0
_________________

------------------------------------
J Allen Morris
**I'm pretty sure I'm right, but then again, I'm just a guy with his head up his a$$.

GMAT Club Premium Membership - big benefits and savings

Kudos [?]: 607 [0], given: 32

Current Student
avatar
Joined: 28 Dec 2004
Posts: 3354

Kudos [?]: 316 [0], given: 2

Location: New York City
Schools: Wharton'11 HBS'12
Re: GMAT Prep Test 2 [#permalink]

Show Tags

New post 01 Dec 2008, 11:50
i get D..

1) says X<0
which means |x-5|=5-x only if x<5

sufficient

2) 5-x>0 means x<5 sufficient

Kudos [?]: 316 [0], given: 2

SVP
SVP
avatar
Joined: 17 Jun 2008
Posts: 1540

Kudos [?]: 278 [0], given: 0

Re: GMAT Prep Test 2 [#permalink]

Show Tags

New post 01 Dec 2008, 12:02
Agree with D.

From stmt1: x < 0. Hence, (x-5) < 0 and hence, sqrt((x-5)^2) = |x-5| = 5-x.

Similarly, from stmt2: (x-5) < 0 and hence, sqrt((x-5)^2) = |x-5| = 5-x.

Kudos [?]: 278 [0], given: 0

Current Student
avatar
Joined: 28 Dec 2004
Posts: 3354

Kudos [?]: 316 [0], given: 2

Location: New York City
Schools: Wharton'11 HBS'12
Re: GMAT Prep Test 2 [#permalink]

Show Tags

New post 01 Dec 2008, 12:03
atletikos wrote:
IMO A



the stem becomes |x-5|=5-x?

so |x-5| the critical point is x=5

so if x>5

x-5=5-x
2x=10 x=5 but thats not possible since x>5

if x<5

-(x-5)=5-x?
-x+5=5-x

x=0 which is true..

Kudos [?]: 316 [0], given: 2

Manager
Manager
avatar
Joined: 18 Nov 2008
Posts: 116

Kudos [?]: 32 [0], given: 0

Re: GMAT Prep Test 2 [#permalink]

Show Tags

New post 01 Dec 2008, 12:31
fresinha12, in 2) we are given that 5-x>0
Consider x=3, then sqrt((x-5)^2) = sqrt((3-5)^2) = sqrt((-2)^2) = sqrt (4) = 2 or -2, which can be either equal to 5-x = 5-3=2, or not (-2), Insuff.
Am I missing smth?

Kudos [?]: 32 [0], given: 0

Senior Manager
Senior Manager
avatar
Joined: 20 Feb 2008
Posts: 295

Kudos [?]: 49 [0], given: 0

Location: Bangalore, India
Schools: R1:Cornell, Yale, NYU. R2: Haas, MIT, Ross
Re: GMAT Prep Test 2 [#permalink]

Show Tags

New post 01 Dec 2008, 15:26
atletikos wrote:
fresinha12, in 2) we are given that 5-x>0
Consider x=3, then sqrt((x-5)^2) = sqrt((3-5)^2) = sqrt((-2)^2) = sqrt (4) = 2 or -2, which can be either equal to 5-x = 5-3=2, or not (-2), Insuff.
Am I missing smth?


Hi Thanks Jallenmorris, I did get more answers.

The OA is D

atletikos, since S2 says 5-x>0 and the Q stem does not ask you if x-5=5-x.
It asks whether ( x-5)^2= (5-x)^2 and so the sign of x or x-5 is not considered.


Thanks for you Answers!

Kudos [?]: 49 [0], given: 0

Re: GMAT Prep Test 2   [#permalink] 01 Dec 2008, 15:26
Display posts from previous: Sort by

Square root of (x-5

  post reply Question banks Downloads My Bookmarks Reviews Important topics  


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

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

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®.