It is currently 19 Mar 2018, 23:16

### 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

# If x + y + z > 0, is z > 1? (1) z > x + y +1 (2) x

Author Message
Current Student
Joined: 11 May 2008
Posts: 552
If x + y + z > 0, is z > 1? (1) z > x + y +1 (2) x [#permalink]

### Show Tags

05 Sep 2008, 20:00
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

If x + y + z > 0, is z > 1?
(1) z > x + y +1
(2) x + y + 1 < 0
VP
Joined: 17 Jun 2008
Posts: 1328

### Show Tags

05 Sep 2008, 20:07
arjtryarjtry wrote:
If x + y + z > 0, is z > 1?
(1) z > x + y +1
(2) x + y + 1 < 0

IMO B

(1) z> x+y+1 => z-1>x+y => z-1+z>x+y+z =>2z-1>0 (from given conditions) => z>1/2 => z can be < 1 or >1 =>INSUFFI
(2)x+y+1<0 => x+y+1<x+y+z (From given conditions)=> z>1 SUFFI
_________________

cheers
Its Now Or Never

Manager
Joined: 03 Jun 2008
Posts: 131
Schools: ISB, Tuck, Michigan (Ross), Darden, MBS

### Show Tags

06 Sep 2008, 05:45
spriya wrote:
arjtryarjtry wrote:
If x + y + z > 0, is z > 1?
(1) z > x + y +1
(2) x + y + 1 < 0

IMO B

(1) z> x+y+1 => z-1>x+y => z-1+z>x+y+z =>2z-1>0 (from given conditions) => z>1/2 => z can be < 1 or >1 =>INSUFFI
(2)x+y+1<0 => x+y+1<x+y+z (From given conditions)=> z>1 SUFFI

IMO : spriya's right
_________________

-----------------------------------------------------------
'It's not the ride, it's the rider'

Senior Manager
Joined: 04 Jan 2006
Posts: 276

### Show Tags

06 Sep 2008, 07:13
arjtryarjtry wrote:
If x + y + z > 0, is z > 1?
(1) z > x + y +1
(2) x + y + 1 < 0

IMO, B.

Let's simplify the question
Assume x + y = a
If a + z > 0 ---------- [1]
is z > 1?

(1) z > a + 1
Or z - a > 1 ---------- [2]
[1] + [2]; 2z > 1
z > 1/2
z could be less or more than 1 INSUFF

(2) a + 1 < 0
-a > 1 ---------- [3]
[1] + [3]; z > 1
SUFF
Re: is z>0?   [#permalink] 06 Sep 2008, 07:13
Display posts from previous: Sort by

# If x + y + z > 0, is z > 1? (1) z > x + y +1 (2) x

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®.