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

It is currently 17 Sep 2014, 02:15

Close

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
Your Progress

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

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

If xyz>0, is xy^2z^3>0 1) y>0 2) x>0

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Senior Manager
Senior Manager
avatar
Joined: 08 Aug 2005
Posts: 251
Followers: 1

Kudos [?]: 4 [0], given: 0

GMAT Tests User
If xyz>0, is xy^2z^3>0 1) y>0 2) x>0 [#permalink] New post 26 Apr 2006, 02:43
1
This post was
BOOKMARKED
If xyz>0, is xy^2z^3>0

1) y>0
2) x>0
Intern
Intern
avatar
Joined: 02 Mar 2006
Posts: 21
Followers: 0

Kudos [?]: 1 [0], given: 0

 [#permalink] New post 26 Apr 2006, 02:48
Is it x * (y^2) * (z^3) or ((xy)^2z)^3
Director
Director
avatar
Joined: 13 Nov 2003
Posts: 801
Location: BULGARIA
Followers: 1

Kudos [?]: 20 [0], given: 0

GMAT Tests User
 [#permalink] New post 26 Apr 2006, 03:14
Hallo
From A) and the stem XYZ>0,X and Z should be either both pos+ or neg-
and A) is sufficient
From B) X is pos, Y is squared and is always pos but Z can be pos or neg
so B) is insuff
I would go for A)
GMAT Club Legend
GMAT Club Legend
User avatar
Joined: 07 Jul 2004
Posts: 5097
Location: Singapore
Followers: 19

Kudos [?]: 143 [0], given: 0

GMAT Tests User
Re: Inequality xyz [#permalink] New post 26 Apr 2006, 03:23
getzgetzu wrote:
If xyz>0, is xy^2z^3>0

1) y>0
2) x>0


For the inequality, do use brackets and parantheses to make it clearer.
SVP
SVP
User avatar
Joined: 24 Sep 2005
Posts: 1898
Followers: 10

Kudos [?]: 104 [0], given: 0

GMAT Tests User
Re: Inequality xyz [#permalink] New post 26 Apr 2006, 03:29
getzgetzu wrote:
If xyz>0, is xy^2z^3>0

1) y>0
2) x>0


from 1) : y> 0 --> xz> 0 because xyz>0
xy^2z^3= (yz)^2 * x* z ..because (yz)^2 > 0 and xz>0 ---> the product>0 ---> suff

2) x> 0 --> yz > 0 ---> y And z > 0 OR y and z < 0
xy^2 > 0 --> the sign of the product depends on z:
+ if z< 0 ---> the product <0
+ if z>0 -----> the product > 0
--->insuff

A it is.
Manager
Manager
avatar
Joined: 27 Mar 2006
Posts: 136
Followers: 1

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

GMAT Tests User
 [#permalink] New post 27 Apr 2006, 18:22
Agree with A :wink:
VP
VP
User avatar
Joined: 29 Dec 2005
Posts: 1351
Followers: 6

Kudos [?]: 28 [0], given: 0

GMAT Tests User
Re: Inequality xyz [#permalink] New post 27 Apr 2006, 19:24
getzgetzu wrote:
If xyz>0, is xy^2z^3>0

1) y>0
2) x>0


very unclear..... :roll: imo, this question can be interpreted in three ways. therefore, i have posted it in 3 different ways.
Senior Manager
Senior Manager
avatar
Joined: 08 Aug 2005
Posts: 251
Followers: 1

Kudos [?]: 4 [0], given: 0

GMAT Tests User
 [#permalink] New post 28 Apr 2006, 01:41
The OA is A. It is an actual test question.
  [#permalink] 28 Apr 2006, 01:41
    Similar topics Author Replies Last post
Similar
Topics:
If xyz > 0, is (x)(y^2)(z^3) < 0 ? (1) y < 0 (2) x gluon 4 11 Nov 2007, 08:44
If xyz > 0, is x*y^2*z^3 < 0? 1) y < 0 2) x > 0 asaf 3 10 Jul 2007, 14:53
If xyz>0, is x(y)^(2z)^3>0 1) y>0 2) x>0 Professor 1 27 Apr 2006, 19:21
If xyz>0, is x(y^2)(z^3)>0? 1) y>0 2) x>0 Professor 1 27 Apr 2006, 19:18
If xyz>0, is (xy)^(2z)^3>0 1) y>0 2) x>0 Professor 7 27 Apr 2006, 19:17
Display posts from previous: Sort by

If xyz>0, is xy^2z^3>0 1) y>0 2) x>0

  Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Privacy Policy| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

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®.