BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

Target Test Prep · GMAT

Choose how you want to prepare

Learn live with an expert or move at your own pace. Every option includes the complete TTP study system.

★★★★★5.0559 reviews
GMATLiveTeach Starts Oct 17
Chris Peckover, Target Test Prep GMAT expert
LIVE ONLINE CLASSES

Get Ready for GMAT Test Day Faster with Live Online Classes

with Chris Peckover, 100th-Percentile GMAT Scorer

Oct 17 · Chris Peckover
Sat · 11:00 AM to 2:00 PM ET
Oct 20 · Chris Peckover
Tue, Thu · 8:00 to 10:00 PM ET
Oct 25 · Josh Braslow
Sun · 1:00 to 4:00 PM ET
Included
40 hours of live online classes + 6 months of TTP OnDemand
  • Attend the first class for free
  • Every class is recorded, so you never fall behind
View classes & enroll
Limited seats availableTarget Test Prep
EALiveTeachOnDemand 5 seats left Start anytime
EXECUTIVE ASSESSMENT

Target Test Prep EA OnDemand

Self-paced EA prep. Study on your schedule.

Logan Thompson
EXECUTIVE ASSESSMENT

Sep 6 to Dec 6, 2026

with Logan Thompson

165+ EA score guarantee
$05-day trial no automatic billing
Schedule
Sun · 9:30 AM to 12:30 PM ET
Included
40 hours of live online classes plus six months of access to the complete TTP EA OnDemand course.
  • 165+ EA Score Guarantee
  • 4,100+ Quant, Verbal, and Integrated Reasoning practice questions
  • 400+ hours of in-depth video lessons
  • 3,000+ step-by-step video solutions
View EA class & enroll Start free 5-day trial
Limited cohort · enrollment openTrial includes full course accessTarget Test Prep
GMATOnDemand Start anytime
SELF-PACED MASTERCLASS

Target Test Prep GMAT OnDemand

Complete access from day one. Study on your schedule.

715+ score guarantee
$0to start then $127/mo
  • Personalized study plan and analytics
  • Thousands of lessons and practice questions
Start free 5-day trial
Read 559 reviewsTarget Test Prep

Compare the format, schedule, and included access before enrolling. Prices and seat counts shown reflect the supplied offer details.

XYZ>0, IS X>0?

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Senior | Next Rank: 100 Posts
Posts: 31
Joined: Sat Aug 23, 2008 8:23 pm
Location: Toronto
Thanked: 1 times
GMAT Score:610
by ebehboud » Sat May 02, 2009 11:40 am
XYZ> 0, is X>0?

1) XY>0
2) XZ>0


My reasoning is:
1) Either x,y >0, OR x,y<0 , and no information on Z. insufficient
2) either x,z>0, OR x,z<0, no information on Y. In sufficient.

Together: If X,Y, Z have to be >0 such that XYZ>0 therefor (C)

I don't have the OA.


Thanks ya'll
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Source: — Data Sufficiency |
Junior | Next Rank: 30 Posts
Posts: 28
Joined: Wed Apr 15, 2009 11:35 pm
Thanked: 1 times

by mixpanda » Sat May 02, 2009 1:43 pm
IMO the answer is C.

Neither statement is sufficient alone, but together you see that all three variables must be either negative or positive. Based on the initial assumption that XYZ is greater than zero, negative is ruled out. All variables are positive, so X is greater than 0.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Senior | Next Rank: 100 Posts
Posts: 31
Joined: Sat Aug 23, 2008 8:23 pm
Location: Toronto
Thanked: 1 times
GMAT Score:610

by ebehboud » Sat May 02, 2009 4:41 pm
Thank you.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Junior | Next Rank: 30 Posts
Posts: 13
Joined: Sat Feb 21, 2009 10:02 pm
GMAT Score:580

by danimmm » Sun May 03, 2009 11:02 am
xz>0
so...
{X>0 and Z>0} or {X<0 and Z<0}

xy>0
so...
{X>0 and Y>0} or {X<0 and Y<0}

any way x,y and z must all have the same sign.
XYZ>0 => all positive.

X positive and u needed both ...
Answer- C
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Master | Next Rank: 500 Posts
Posts: 125
Joined: Sun Sep 16, 2007 1:38 pm
Thanked: 6 times

Re: XYZ>0, IS X>0?

by chetanojha » Sun May 03, 2009 11:12 am
Statement1: this stmt show X & Y both have same sign. No information about Z. Insufficient.

Statement 2: proves X&Z both have same sign. No information on Y. INSUFF.

Together, it prove X,Y and Z are all save sign and since XYZ>0 all are +ve. Hence X>0.
ebehboud wrote:XYZ> 0, is X>0?

1) XY>0
2) XZ>0


My reasoning is:
1) Either x,y >0, OR x,y<0 , and no information on Z. insufficient
2) either x,z>0, OR x,z<0, no information on Y. In sufficient.

Together: If X,Y, Z have to be >0 such that XYZ>0 therefor (C)

I don't have the OA.


Thanks ya'll
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1