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

 It is currently 27 Apr 2015, 17:22

### 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

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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# What is the value of |x|? (1) x = -|x| (2) x^2 = 4

Author Message
TAGS:
Director
Joined: 20 Sep 2006
Posts: 658
Followers: 2

Kudos [?]: 77 [0], given: 7

What is the value of |x|? (1) x = -|x| (2) x^2 = 4 [#permalink]  11 Aug 2008, 18:00
What is the value of |x|?
(1) x = -|x|
(2) x^2 = 4
Director
Joined: 12 Jul 2008
Posts: 518
Schools: Wharton
Followers: 16

Kudos [?]: 118 [0], given: 0

Re: mod of X [#permalink]  11 Aug 2008, 18:13
rao_1857 wrote:
What is the value of |x|?
(1) x = -|x|
(2) x^2 = 4

(1) Insufficient

x can be 0 or any negative number

(2) Insufficient

x = 2 or -2

1 & 2 Sufficient

x = -2
Manager
Joined: 09 Jul 2008
Posts: 111
Location: Dallas, TX
Schools: McCombs 2011
Followers: 1

Kudos [?]: 10 [0], given: 1

Re: mod of X [#permalink]  11 Aug 2008, 18:33
rao_1857 wrote:
What is the value of |x|?
(1) x = -|x|
(2) x^2 = 4

Q stem is asking for |x|. So, B
Director
Joined: 20 Sep 2006
Posts: 658
Followers: 2

Kudos [?]: 77 [0], given: 7

Re: mod of X [#permalink]  11 Aug 2008, 18:35
zoinnk wrote:
rao_1857 wrote:
What is the value of |x|?
(1) x = -|x|
(2) x^2 = 4

(1) Insufficient

x can be 0 or any negative number

(2) Insufficient

x = 2 or -2

1 & 2 Sufficient

x = -2

good point, for some reason I ignored the -ve numbers and thought x =0.
thanks for clarifying

FYI ... quest is asking mod X so B itself is suff
SVP
Joined: 07 Nov 2007
Posts: 1828
Location: New York
Followers: 29

Kudos [?]: 537 [0], given: 5

Re: mod of X [#permalink]  11 Aug 2008, 19:43
rao_1857 wrote:
What is the value of |x|?
(1) x = -|x|
(2) x^2 = 4

1) x=-|x|
---> |x| = -x
we don't the value of X.. it can be any hting..positive or negative values

In sufficient

2) |x|=2
sufficient

B
_________________

Smiling wins more friends than frowning

Manager
Joined: 23 Apr 2008
Posts: 90
Followers: 1

Kudos [?]: 6 [0], given: 0

Re: mod of X [#permalink]  11 Aug 2008, 22:50
IMO B

x^2=4
which gives
x=+/- 2

in any case |x|=2
Re: mod of X   [#permalink] 11 Aug 2008, 22:50
Similar topics Replies Last post
Similar
Topics:
1 What is the value of x^2 + 1/x^2 ? 6 24 Mar 2015, 03:32
1 If x^2 + 1/x^2 = 4, what is the value of x^4 + 1/x^4 ? 1 26 Jul 2014, 08:59
what is the value of |x| (1) x=-|x| (2)x^2=4 6 12 Oct 2009, 23:45
What is the value of x? (1) x^4+x^2+1=(1/x^4+x^2+1) (2) 9 15 May 2007, 18:48
What is the value of |x|? (1) x = -|x| (2) x^2 = 4 If 10 16 Oct 2005, 00:44
Display posts from previous: Sort by