It is currently 19 Mar 2018, 23:18

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

GMATprep- absolute value

Author Message
Intern
Joined: 22 Jul 2008
Posts: 10

Show Tags

17 Aug 2008, 08:25
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Seems like I always get absolute value q's wrong. Ahhh...
Attachments

a.JPG [ 38.28 KiB | Viewed 793 times ]

Director
Joined: 12 Jul 2008
Posts: 513
Schools: Wharton

Show Tags

17 Aug 2008, 09:01
flygmat wrote:
Seems like I always get absolute value q's wrong. Ahhh...

D

(1) Sufficient

If zy < xy < 0 and z < x, then y > 0 and z and x are both negative

Thus,
|x - z| + |x| = |z| - |x| + |x| = |z|

OR

|x - z| + |x| = -(z-x) + (-x) = -z + x - x = -z
Because z is negative, |z| = -z.

(2) Sufficient

If y > 0, then z and x are both negative.

Same solution as (1)
Intern
Joined: 22 Jul 2008
Posts: 10

Show Tags

19 Aug 2008, 18:19
zoinnk wrote:
flygmat wrote:
Seems like I always get absolute value q's wrong. Ahhh...

D

(1) Sufficient

If zy < xy < 0 and z < x, then y > 0 and z and x are both negative

Thus,
|x - z| + |x| = |z| - |x| + |x| = |z|

OR

|x - z| + |x| = -(z-x) + (-x) = -z + x - x = -z
Because z is negative, |z| = -z.

(2) Sufficient

If y > 0, then z and x are both negative.

Same solution as (1)

Finally got it!!!!
Since y= + and z and x = -, both are sufficient.
I plugged in numbers to figure it out. Thanks!
Re: GMATprep- absolute value   [#permalink] 19 Aug 2008, 18:19
Display posts from previous: Sort by

GMATprep- absolute value

Moderator: chetan2u

 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®.