X^3 . y^2. z >0 => this product is +ve. As y^2 will always +ve, for making full term +ve there are 2 ways..
1) X^3 and z both are +ve => X>0 abd z>0
2) both are -ve => X<0 and z<0.
now
(1) XZ<0 = either X or y is -ve. irrispective of value of y this statment nagate the statement in question. SUFF.
(2)alone y>0 is not helping us as this is anyways not affecting the sigh of over all term as y^2 will be +ve for any value of y. NOT SUFF
Ans : A
BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course
Redeem
Featured Course
Target Test Prep GMAT OnDemand
Scott Woodbury-Stewart’s private virtual classroom — 400 hours of master-class video lessons for the GMAT Focus Edition.
- 715+ score guarantee — highest in the industry (99th percentile)
- 52 chapters · 1,500+ lessons · 4,000+ practice questions
- 400 hours of video · 1,500+ instructor-led HD smartboard lessons
- 300,000+ students accepted to Harvard, Stanford, Wharton, Booth & Sloan & more
- 24/7 live support + weekly Zoom office hours with GMAT instructors
- TTP AI Assist — 24/7 AI-powered virtual tutor for instant help
- 1,200+ flashcards + AI-powered study assistant & daily calendar
- OnDemand, LiveTeach & GMAT Bootcamp formats available
- Also: GRE, SAT Math & Executive Assessment courses
- MBA Admissions Consulting now available
- 🏆 2025 EdTech Breakthrough Award: Test Prep Solution Provider of the Year
- 200,000+ students served
- 5-day free trial — $0 to start, no auto-billing, cancel anytime
★★★★★
5.0
(559 reviews)
130-pt guarantee
$0 to start
then $127/mo
Power
Source: Beat The GMAT — Data Sufficiency |
Cartera,
Please use parenetheses if possible.
Its very easy to read the question as x^3y^2z
as x raised to power 3y again raised to power 2z. The question then becomes a little interesting.
Is the question x^3 * y^2 * z like Welcome has solved?
Regards,
CR
Please use parenetheses if possible.
Its very easy to read the question as x^3y^2z
as x raised to power 3y again raised to power 2z. The question then becomes a little interesting.
Is the question x^3 * y^2 * z like Welcome has solved?
Regards,
CR
x^3y^2z>0?
(1)xz<0
(2)y>0
with the 1st statement, what if y is 0? (x^3)(0^2)z=0--then it is not >0, then statement 1 is not valid...
(1)xz<0
(2)y>0
with the 1st statement, what if y is 0? (x^3)(0^2)z=0--then it is not >0, then statement 1 is not valid...
This can be written as
(x^2)(y^2)(xz)
The (x^2)(y^2) will be positive in all cases except if x or y is 0.
If both 1 and 2 are considered as correct, this means, neither x nor y is 0.
I will go with - Both togther are sufficient.
(x^2)(y^2)(xz)
The (x^2)(y^2) will be positive in all cases except if x or y is 0.
If both 1 and 2 are considered as correct, this means, neither x nor y is 0.
I will go with - Both togther are sufficient.
