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

It is currently 13 Jul 2014, 09:29

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

anybody has a quick approach to this one for the value of N:

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
1 KUDOS received
Director
Director
User avatar
Joined: 26 Feb 2006
Posts: 908
Followers: 3

Kudos [?]: 33 [1] , given: 0

GMAT Tests User
anybody has a quick approach to this one for the value of N: [#permalink] New post 22 Apr 2007, 10:33
1
This post received
KUDOS
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
anybody has a quick approach to this one for the value of N:

|NтАУ|N+1||=|NтАУ2|
SVP
SVP
User avatar
Joined: 01 May 2006
Posts: 1817
Followers: 8

Kudos [?]: 86 [0], given: 0

GMAT Tests User
 [#permalink] New post 22 Apr 2007, 11:53
o If n+1 >= 0, then
|NтАУ|N+1||=|NтАУ2|
<=> |N - N -1| = |N-2|
<=> 1 = |N-2|
<=> N=3 or N = 1

o If n+1 =< 0, then
|NтАУ|N+1||=|NтАУ2|
<=> |N + N+1| = |N-2|
<=> |2*N+1| = |N-2|
<=> -(2*N+1) = -(N-2) as 2*N+1 < 0 and N-2 < 0
<=> N = -3

Thus, N = -3 or N=1 or N=3
SVP
SVP
User avatar
Joined: 01 May 2006
Posts: 1817
Followers: 8

Kudos [?]: 86 [0], given: 0

GMAT Tests User
 [#permalink] New post 22 Apr 2007, 12:32
techjanson wrote:
Fig wrote:
o If n+1 >= 0, then
|NтАУ|N+1||=|NтАУ2|
<=> |N - N -1| = |N-2|
<=> 1 = |N-2|
<=> N=3 or N = 1

o If n+1 =< 0, then
|NтАУ|N+1||=|NтАУ2|
<=> |N + N+1| = |N-2|
<=> |2*N+1| = |N-2|
<=> -(2*N+1) = -(N-2) as 2*N+1 < 0 and N-2 < 0
<=> N = -3

Thus, N = -3 or N=1 or N=3


Excellent explanation. Thanks!


Thanks to u :)
Current Student
avatar
Joined: 28 Dec 2004
Posts: 3405
Location: New York City
Schools: Wharton'11 HBS'12
Followers: 13

Kudos [?]: 149 [0], given: 2

GMAT Tests User
 [#permalink] New post 23 Apr 2007, 12:06
FIG: you are the abs, mod King :)
VP
VP
User avatar
Joined: 03 Apr 2007
Posts: 1378
Followers: 2

Kudos [?]: 147 [0], given: 10

GMAT Tests User Reviews Badge
 [#permalink] New post 23 Apr 2007, 12:19
Fig wrote:
o If n+1 >= 0, then
|NтАУ|N+1||=|NтАУ2|
<=> |N - N -1| = |N-2|
<=> 1 = |N-2|
<=> N=3 or N = 1

o If n+1 =< 0, then
|NтАУ|N+1||=|NтАУ2|
<=> |N + N+1| = |N-2|
<=> |2*N+1| = |N-2|
<=> -(2*N+1) = -(N-2) as 2*N+1 < 0 and N-2 < 0
<=> N = -3

Thus, N = -3 or N=1 or N=3


Can you please explain the step in red color?
SVP
SVP
User avatar
Joined: 01 May 2006
Posts: 1817
Followers: 8

Kudos [?]: 86 [0], given: 0

GMAT Tests User
 [#permalink] New post 23 Apr 2007, 12:25
fresinha12 wrote:
FIG: you are the abs, mod King :)


Thanks :)... I just hope it helps to clarify it :)
SVP
SVP
User avatar
Joined: 01 May 2006
Posts: 1817
Followers: 8

Kudos [?]: 86 [0], given: 0

GMAT Tests User
 [#permalink] New post 23 Apr 2007, 12:28
goalsnr wrote:
Fig wrote:
o If n+1 >= 0, then
|NтАУ|N+1||=|NтАУ2|
<=> |N - N -1| = |N-2|
<=> 1 = |N-2|
<=> N=3 or N = 1

o If n+1 =< 0, then
|NтАУ|N+1||=|NтАУ2|
<=> |N + N+1| = |N-2|
<=> |2*N+1| = |N-2|
<=> -(2*N+1) = -(N-2) as 2*N+1 < 0 and N-2 < 0
<=> N = -3

Thus, N = -3 or N=1 or N=3


Can you please explain the step in red color?


Ok :)

In the second case, we have n+1 =< 0. Thus, we have |n+1| = -(n+1) : an absolute must always be positive or equal to 0. :)
Director
Director
avatar
Joined: 14 Aug 2007
Posts: 735
Followers: 7

Kudos [?]: 96 [0], given: 0

GMAT Tests User
Re: PS: Mod [#permalink] New post 20 Apr 2009, 00:01
Himalayan wrote:
anybody has a quick approach to this one for the value of N:

|NтАУ|N+1||=|NтАУ2|


what does NтАУ and NтАУ2 mean here?
Manager
Manager
avatar
Joined: 22 Feb 2009
Posts: 140
Schools: Kellogg (R1 Dinged),Cornell (R2), Emory(Interview Scheduled), IESE (R1 Interviewed), ISB (Interviewed), LBS (R2), Vanderbilt (R3 Interviewed)
Followers: 8

Kudos [?]: 68 [0], given: 10

GMAT Tests User
Re: PS: Mod [#permalink] New post 20 Apr 2009, 11:19
same question as above
Manager
Manager
User avatar
Joined: 22 Jul 2009
Posts: 192
Followers: 4

Kudos [?]: 186 [0], given: 18

GMAT Tests User
Re: PS: Mod [#permalink] New post 02 Aug 2009, 12:29
Is there a quant guru that could explain this question in more depth?

I don't understand the transition ...

"If n+1 >= 0, then
|NтАУ|N+1||=|NтАУ2|
<=> |N - N -1| = |N-2|"

Why?

Thanks in advance,
a
_________________

Please kudos if my post helps.

CEO
CEO
User avatar
Joined: 29 Aug 2007
Posts: 2501
Followers: 51

Kudos [?]: 474 [0], given: 19

GMAT Tests User
Re: PS: Mod [#permalink] New post 02 Aug 2009, 21:32
Himalayan wrote:
anybody has a quick approach to this one for the value of N:
|NтАУ|N+1||=|NтАУ2|


I guess the symbol (-ve sign) has been changed into something else. The question should be as under:

Quote:
What is the value of N:
|N - |N+1||=|N - 2|


Work out from the inside modulus
The possibilities for : (1) If (N+1) >= 0 (2) If (N+1) <= 0

(1) If (N+1) >= 0
|N - N -1| = |N - 2|
|-1| = |N - 2|
1 = |N - 2|
N = 1 or 3

(2) If (N+1) <= 0
|N+N+1| = |N - 2|
|2N+1| = |N - 2|

(i) 2N +1 = N - 2
2N - N = - 3
N = -3

(ii) 2N +1 = N - 2
2N +1 = - N + 2
2N + N = 1
N = 1/3

(ii) - 2N -1 = - N + 2
-N = 3
N = -3

N = -3, 1/3, 1, & 3.
_________________

Verbal: new-to-the-verbal-forum-please-read-this-first-77546.html
Math: new-to-the-math-forum-please-read-this-first-77764.html
Gmat: everything-you-need-to-prepare-for-the-gmat-revised-77983.html


GT

Re: PS: Mod   [#permalink] 02 Aug 2009, 21:32
    Similar topics Author Replies Last post
Similar
Topics:
1 Experts publish their posts in the topic Quick one on PS/DS approach... BMeloche 2 29 Aug 2012, 21:22
1 Experts publish their posts in the topic A Square Root Has Only One Value MyFutureMyProspects 6 17 Jun 2012, 10:56
4 Experts publish their posts in the topic Time Speed and Distance - Quick Approach gurpreetsingh 8 15 Sep 2010, 06:48
one quick question!! ramana 4 21 Aug 2010, 10:31
Does anyone have a quick way of approaching this problem? giantSwan 1 15 May 2008, 19:02
Display posts from previous: Sort by

anybody has a quick approach to this one for the value of N:

  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®.