If x+y/z = -2, is x positive ?
(1) z is negative
(2) y is positive
Source GMAT PREP
GMAT PREP
This topic has expert replies
-
- Legendary Member
- Posts: 941
- Joined: Sun Dec 27, 2009 12:28 am
- Thanked: 20 times
- Followed by:1 members
- eaakbari
- Master | Next Rank: 500 Posts
- Posts: 435
- Joined: Mon Mar 15, 2010 6:15 am
- Thanked: 32 times
- Followed by:1 members
Stem
For x to be positive y<x and y> 0
or z<0
Statement one
It proves z is negative but then x could be positive or also x negative but lesser than y
Hence Insuff
Statement two
Clearly Insuff again applying previous logic
Combined
Since z is negative and y is positive a positive value of x could lead to - 2
then again if x <y and x <0 could also give same answer
Hence Insuff
IMO E
For x to be positive y<x and y> 0
or z<0
Statement one
It proves z is negative but then x could be positive or also x negative but lesser than y
Hence Insuff
Statement two
Clearly Insuff again applying previous logic
Combined
Since z is negative and y is positive a positive value of x could lead to - 2
then again if x <y and x <0 could also give same answer
Hence Insuff
IMO E
-
- Legendary Member
- Posts: 941
- Joined: Sun Dec 27, 2009 12:28 am
- Thanked: 20 times
- Followed by:1 members
is it possible for you to explain with #s?
eaakbari wrote:Stem
For x to be positive y<x and y> 0
or z<0
Statement one
It proves z is negative but then x could be positive or also x negative but lesser than y
Hence Insuff
Statement two
Clearly Insuff again applying previous logic
Combined
Since z is negative and y is positive a positive value of x could lead to - 2
then again if x <y and x <0 could also give same answer
Hence Insuff
IMO E
- eaakbari
- Master | Next Rank: 500 Posts
- Posts: 435
- Joined: Mon Mar 15, 2010 6:15 am
- Thanked: 32 times
- Followed by:1 members
I see I may have interpreted the question as (x+y)/z but that does not change the answer.
Statement one
If x=4, y=12 and z =-2
Then 4 + -6 =-2
but if x = -1 and y=6 and z=-6
Answer is -2
Hence Insuff
Statement two
Take the same examples as before y is positive in both and it gives us different values.
Hence Insuff as x can be negative or positive
Combined
Same examples as before and yet x can be negative or positive
Hence Insuff
Therefore E
Statement one
If x=4, y=12 and z =-2
Then 4 + -6 =-2
but if x = -1 and y=6 and z=-6
Answer is -2
Hence Insuff
Statement two
Take the same examples as before y is positive in both and it gives us different values.
Hence Insuff as x can be negative or positive
Combined
Same examples as before and yet x can be negative or positive
Hence Insuff
Therefore E
-
- Legendary Member
- Posts: 941
- Joined: Sun Dec 27, 2009 12:28 am
- Thanked: 20 times
- Followed by:1 members
Okay now i am TOTALLY confused
The OA is E
eaakbari which answer of urs do u choose to stick on to now?
The OA is E
eaakbari which answer of urs do u choose to stick on to now?