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

 It is currently 19 Jun 2013, 07:18

# x,y,z>0, is y between x and z? 1). x<(y/2)<z 2).

Author Message
TAGS:
Manager
Joined: 04 Sep 2006
Posts: 117
Followers: 2

Kudos [?]: 3 [0], given: 0

x,y,z>0, is y between x and z? 1). x<(y/2)<z 2). [#permalink]  04 Jun 2009, 11:42
00:00

Question Stats:

33% (00:00) correct 66% (01:25) wrong based on 3 sessions
x,y,z>0, is y between x and z?
1). x<(y/2)<z
2). x<2y<z
Senior Manager
Joined: 16 Jan 2009
Posts: 351
Location: United States
GMAT 1: 710 Q50 V35
GPA: 3
WE: Sales (Telecommunications)
Followers: 2

Kudos [?]: 55 [0], given: 15

Re: inequality [#permalink]  04 Jun 2009, 14:23
x<(y/2)<z
case 1
x y z
1.0 1.1 1.2
TRUE

case 1
x y z
1.0 1.2 1.1
FALSE

INSUFFICIENT

x<2y<z amkes it necessary for y to be between x and z
SUFFICIENT

IMO B
_________________

Lahoosaher

Senior Manager
Joined: 16 Apr 2009
Posts: 252
Schools: Ross
Followers: 1

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

Re: inequality [#permalink]  06 Jun 2009, 17:23
Quote:
x<2y<z amkes it necessary for y to be between x and z
SUFFICIENT

Say,
x=5
y=3
z=10
x<2y<z is true --?5<6<10 but we can't say that y is b/w x and z..
_________________

Keep trying no matter how hard it seems, it will get easier.

Manager
Joined: 11 Aug 2008
Posts: 165
Followers: 1

Kudos [?]: 32 [0], given: 8

Re: inequality [#permalink]  08 Jun 2009, 19:56
1) Case 1: y/2=4, case 2: y/2=2, in two case x=1, z=6
In two case, we have different ans (not suf)
2) with x=3 and 2y = 10 and 4, we have different ans (not suf)
Together we have, x<y/2<y<2y<z => YES
Hence C
Re: inequality   [#permalink] 08 Jun 2009, 19:56
Similar topics Replies Last post
Similar
Topics:
Is x(y + z) > 0? 1) xyz > 0 2) yz > 0 3 28 Jul 2004, 02:58
If xyz>0, is xy^2z^3>0 1) y>0 2) x>0 7 26 Apr 2006, 03:43
If xyz>0, is x(y^2)(z^3)>0? 1) y>0 2) x>0 1 27 Apr 2006, 20:18
If xyz>0, is x(y)^(2z)^3>0 1) y>0 2) x>0 1 27 Apr 2006, 20:21
Is -x/(-y)(-z) -ve?? 1) x*y >0 2)xyz>0 6 11 Sep 2006, 10:21
Display posts from previous: Sort by