Events & Promotions
|
|
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
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Nov 2007:30 AM PST
-08:30 AM PST
Learn what truly sets the UC Riverside MBA apart and how it helps in your professional growth
Nov 2001:30 PM EST
-02:30 PM IST
Learn how Kamakshi achieved a GMAT 675 with an impressive 96th %ile in Data Insights. Discover the unique methods and exam strategies that helped her excel in DI along with other sections for a balanced and high score.
Nov 1912:30 PM EST
-01:30 PM EST
Learn how Keshav, a Chartered Accountant, scored an impressive 705 on GMAT in just 30 days with GMATWhiz's expert guidance. In this video, he shares preparation tips and strategies that worked for him, including the mock, time management, and more
Nov 2211:00 AM IST
-01:00 PM IST
Do RC/MSR passages scare you? e-GMAT is conducting a masterclass to help you learn – Learn effective reading strategies Tackle difficult RC & MSR with confidence Excel in timed test environment- Nov 23
11:00 AM IST
-01:00 PM IST
Attend this free GMAT Algebra Webinar and learn how to master the most challenging Inequalities and Absolute Value problems with ease. 
Nov 2407:00 PM PST
-08:00 PM PST
Full-length FE mock with insightful analytics, weakness diagnosis, and video explanations!
Nov 2510:00 AM EST
-11:00 AM EST
Prefer video-based learning? The Target Test Prep OnDemand course is a one-of-a-kind video masterclass featuring 400 hours of lecture-style teaching by Scott Woodbury-Stewart, founder of Target Test Prep and one of the most accomplished GMAT instructors.
16 Sep 2014, 01:15
Kudos
Bookmarks
C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
65%
(hard)
Question Stats:
42% (01:14) correct
58%
(01:04)
wrong
based on 163
sessions
History
Date
Time
Result
Not Attempted Yet
16 Sep 2014, 01:15
Kudos
Bookmarks
Official Solution:
Is \(x^2*y^3*z > 0\)?
For the inequality \(x^2*y^3*z > 0\) to hold true, the following conditions must be met:
1. Both \(y\) and \(z\) must either be positive or negative, meaning they must share the same sign. This would ensure that \(y^3*z\) is positive;
AND
2. \(x\) cannot be zero, to ensure that \(x^2\) is positive.
(1) \(yz > 0\).
The above implies that \(y\) and \(z\) are either both positive or both negative, which satisfies the first condition. However, information about \(x\) (the second condition) is lacking: if \(x = 0\), \(x^2*y^3*z\) would be 0, not more than 0. Not sufficient.
(2) \(xz < 0\).
The above implies that \(x \ne 0\), thus satisfying the second condition. But we don't have information about the signs of \(y\) and \(z\) (the first condition). This too, is insufficient.
(1)+(2) When combined, both conditions are met. Therefore, it is sufficient.
Answer: C
Is \(x^2*y^3*z > 0\)?
For the inequality \(x^2*y^3*z > 0\) to hold true, the following conditions must be met:
1. Both \(y\) and \(z\) must either be positive or negative, meaning they must share the same sign. This would ensure that \(y^3*z\) is positive;
AND
2. \(x\) cannot be zero, to ensure that \(x^2\) is positive.
(1) \(yz > 0\).
The above implies that \(y\) and \(z\) are either both positive or both negative, which satisfies the first condition. However, information about \(x\) (the second condition) is lacking: if \(x = 0\), \(x^2*y^3*z\) would be 0, not more than 0. Not sufficient.
(2) \(xz < 0\).
The above implies that \(x \ne 0\), thus satisfying the second condition. But we don't have information about the signs of \(y\) and \(z\) (the first condition). This too, is insufficient.
(1)+(2) When combined, both conditions are met. Therefore, it is sufficient.
Answer: C
General Discussion
shasadou
Joined: 12 Aug 2015
Last visit: 24 Nov 2022
Posts: 219
Own Kudos:
Given Kudos: 1,476
Concentration: General Management, Operations
Schools: Johnson '18 (WL) Duke '18 (M) Tuck '18 (D)
GMAT 1: 640 Q40 V37
GMAT 2: 650 Q43 V36
GMAT 3: 600 Q47 V27
GPA: 3.3
WE:Management Consulting (Consulting)
12 Feb 2016, 01:34
Kudos
Bookmarks
great question
