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

It is currently 26 May 2016, 02:13
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

Is |x^2| - |y^2| = |x^2–y^2| ?

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Intern
Intern
avatar
Joined: 24 Jul 2012
Posts: 13
Schools: Schulich '16
GMAT 1: 610 Q49 V26
WE: Consulting (Consulting)
Followers: 0

Kudos [?]: 21 [0], given: 7

Is |x^2| - |y^2| = |x^2–y^2| ? [#permalink]

Show Tags

New post 26 Jul 2012, 05:42
2
This post was
BOOKMARKED
00:00
A
B
C
D
E

Difficulty:

  55% (hard)

Question Stats:

51% (02:06) correct 49% (00:58) wrong based on 88 sessions

HideShow timer Statistics

Is |x^2| - |y^2| = |x^2–y^2| ?

(1) x > 0
(2) y < 0
[Reveal] Spoiler: OA
Manager
Manager
avatar
Joined: 06 Jun 2012
Posts: 147
Followers: 0

Kudos [?]: 128 [0], given: 37

GMAT ToolKit User
Re: Is |X^2| - |Y^2| = |X^2–Y^2| ? [#permalink]

Show Tags

New post 26 Jul 2012, 06:27
Ans is E
Statement 1: x>0; if x = 1 & y =5, both sides are not same. if x = 10 & y =5, both sides are same. Not sufficient
Statement 2: y<0; if x = 1 & y = -5, both sides are not same. if x = 10 & y = -5, both sides are same. Not sufficient

Together x>0 & y<0 again not Sufficient as seen from above examples
_________________

Please give Kudos if you like the post

3 KUDOS received
Director
Director
User avatar
Joined: 22 Mar 2011
Posts: 612
WE: Science (Education)
Followers: 90

Kudos [?]: 771 [3] , given: 43

Re: Is |x^2| - |y^2| = |x^2–y^2| ? [#permalink]

Show Tags

New post 26 Jul 2012, 10:35
3
This post received
KUDOS
The given equality can be rewritten as \(x^2-y^2=|x^2-y^2|\).
As \(|a|=a\) if and only if \(a\geq0\), the question can be rephrased as "Is \(x^2-y^2\geq0\) or \(x^2\geq{y^2}\) ?".

Then, we can easily see that the given pieces of information don't help at all, neither each one alone, nor both together.

Therefore, answer is E.
_________________

PhD in Applied Mathematics
Love GMAT Quant questions and running.

GMAT Club Legend
GMAT Club Legend
User avatar
Joined: 09 Sep 2013
Posts: 9627
Followers: 465

Kudos [?]: 120 [0], given: 0

Premium Member
Re: Is |x^2| - |y^2| = |x^2–y^2| ? [#permalink]

Show Tags

New post 12 Sep 2013, 09:54
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.
_________________

GMAT Books | GMAT Club Tests | Best Prices on GMAT Courses | GMAT Mobile App | Math Resources | Verbal Resources

Re: Is |x^2| - |y^2| = |x^2–y^2| ?   [#permalink] 12 Sep 2013, 09:54
    Similar topics Author Replies Last post
Similar
Topics:
Experts publish their posts in the topic Is |x^2+y^2| > |x^2-y^2|? Bunuel 0 24 Sep 2015, 01:53
15 Experts publish their posts in the topic Is |x^2 + y^2| > |x^2 - y^2|? makhija1 21 04 Jun 2013, 20:45
13 Experts publish their posts in the topic Is x^2+y^2 divisible by 5? ctrlaltdel 13 14 Nov 2009, 18:56
29 Experts publish their posts in the topic Is x^2 - y^2 divisible by 8? icandy 24 09 May 2009, 11:25
16 Experts publish their posts in the topic Is x^2 – y^2 a positive number ? topmbaseeker 10 02 Oct 2008, 06:47
Display posts from previous: Sort by

Is |x^2| - |y^2| = |x^2–y^2| ?

  new topic 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 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®.