Check GMAT Club Decision Tracker for the Latest School Decision Releases https://gmatclub.com/AppTrack

 It is currently 22 May 2017, 16:30

### 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

# gmat prep DS - mode

 post reply Question banks Downloads My Bookmarks Reviews Important topics
Author Message
Manager
Joined: 20 Mar 2005
Posts: 170
Followers: 2

Kudos [?]: 81 [0], given: 0

gmat prep DS - mode [#permalink]

### Show Tags

25 Jun 2007, 06:15
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

### HideShow timer Statistics

This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Attachments

Slide6.JPG [ 24.07 KiB | Viewed 920 times ]

Senior Manager
Joined: 28 Feb 2007
Posts: 304
Followers: 1

Kudos [?]: 40 [0], given: 0

### Show Tags

25 Jun 2007, 07:17
There are at least 2 different approaches to this problem,
but as to me the best one is PICKing some #s.

1-method)
try x=5,y=2,z=7 and x=-5 , y=7 , z=2 for statement 1 to see
/x/=y-z

2-method)

from the rule of modul:
/x/=y-z then
a) if x>0 then x= y-z or
b) if x<o then x=-(y-z) =z-y so statements 1+2 togather includes
second option (b) completely. Tharefore C

Last edited by UMB on 25 Jun 2007, 12:23, edited 1 time in total.
CIO
Joined: 09 Mar 2003
Posts: 463
Followers: 2

Kudos [?]: 63 [0], given: 0

Re: gmat prep DS - mode [#permalink]

### Show Tags

25 Jun 2007, 09:42
Balvinder wrote:

The first statement says that x + y = z. So x = z - y.

If x is positive, the |x| is also z - y, because nothing changes. If x is negative, then |x| = y - z, because you have to change the sign to make it go positive. Since you don't know about x, you can't know which is right.

Two doesn't say anything on its own, but together, we know that x is negative, so it must be that |x| = y - z.

C
Re: gmat prep DS - mode   [#permalink] 25 Jun 2007, 09:42
Display posts from previous: Sort by

# gmat prep DS - mode

 post reply Question banks Downloads My Bookmarks Reviews Important topics

 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®.