It is currently 17 Oct 2017, 08:39

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

GMATPREP Inequality

  post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
Intern
Intern
avatar
Joined: 22 Jul 2008
Posts: 10

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

GMATPREP Inequality [#permalink]

Show Tags

New post 04 Aug 2008, 14:32
1
This post was
BOOKMARKED
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

I'm very much lost when it comes to solving an inequality problem. Please help!
Attachments

11.JPG
11.JPG [ 58.04 KiB | Viewed 977 times ]

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

1 KUDOS received
Manager
Manager
User avatar
Joined: 18 Jan 2008
Posts: 221

Kudos [?]: 26 [1], given: 0

Schools: The School that shall not be named
Re: GMATPREP Inequality [#permalink]

Show Tags

New post 04 Aug 2008, 14:47
1
This post received
KUDOS
Answer has to be D.

Just look at the stem for a second.
\(sqrt((X-5)^2) = |X-5|\)
So, |X-5|=5-X when X < 5 or X = 5.
|X-5|!=5-X when X > 5

Now look at the choices:
a) -X|X|>0
Since |X| has to be positive, X has to be negative for -X to be greater than 0
A negative number is less than 5, so A is suff.

b)5-X>0
so, 5>X, good enough for the two side of the stem to be equal.
B also suff.

Hence answer = D
_________________

明日やろうばかやろう

24 wrote:
Your East Coast bias is worse than ESPN.

Kudos [?]: 26 [1], given: 0

1 KUDOS received
Director
Director
avatar
Joined: 27 May 2008
Posts: 541

Kudos [?]: 363 [1], given: 0

Re: GMATPREP Inequality [#permalink]

Show Tags

New post 05 Aug 2008, 09:02
1
This post received
KUDOS
lets simplify the question stem

Is \(sqrt((x-5)^2) = 5-x\)
Is x-5 = 5-x
Is 2x = 10
Is x = 5 ?

its a YES or NO question

statement 1 : -x * |x| > 0
multiplication of two number is positive and one of them |x| is positive so -x has to Positive --> x is negative
answer to our question -- NO

statement 2 : 5-x > 0
x < 5 ... if x is less than 5 then it cant be equal to 5
answer to our question --- NO

Option D

Kudos [?]: 363 [1], given: 0

1 KUDOS received
Senior Manager
Senior Manager
avatar
Joined: 23 May 2006
Posts: 322

Kudos [?]: 384 [1], given: 0

Re: GMATPREP Inequality [#permalink]

Show Tags

New post 05 Aug 2008, 09:38
1
This post received
KUDOS
Agree with durgesh.

IMO D

Kudos [?]: 384 [1], given: 0

Intern
Intern
avatar
Joined: 22 Jul 2008
Posts: 10

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

Re: GMATPREP Inequality [#permalink]

Show Tags

New post 05 Aug 2008, 11:20
I totally got it now! Thank you :wink:

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

VP
VP
avatar
Joined: 17 Jun 2008
Posts: 1374

Kudos [?]: 406 [0], given: 0

Re: GMATPREP Inequality [#permalink]

Show Tags

New post 05 Aug 2008, 17:45
flygmat wrote:
I'm very much lost when it comes to solving an inequality problem. Please help!


say [(x-5)^2]^1/2 =P
here RHS ,i.e,is always +ve => P>0 since (x-5)^2 >0 always
=> 5-x >0 always for P=5-x

(1) says -x|x|>0 => x<0 since |x|>0 always => 5-x >0 always hence SUFF to answer
(2)says 5-x >0 SUFFI
IMO D
_________________

cheers
Its Now Or Never

Kudos [?]: 406 [0], given: 0

Re: GMATPREP Inequality   [#permalink] 05 Aug 2008, 17:45
Display posts from previous: Sort by

GMATPREP Inequality

  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®.