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

Redeem
TTP OnDemand GMAT Video Course
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
Start Free 5-Day Trial Read 559 Reviews →

Value of XY

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Source: — Data Sufficiency |
User avatar
Community Manager
Posts: 1537
Joined: Mon Aug 10, 2009 6:10 pmFollowed by: 252 members
Thanked: 653 times

by papgust » Thu Dec 03, 2009 11:23 pm
6xy = x^2 * y + 9y
x^2 * y - 6xy + 9y = 0
y*(x^2-6x+9)=0
y=0 or x=3

1) x=-2. I don't find any relevance or any use of this statement. Since we know that y can only be 0, then xy will also be 0.
Sufficient.

2) x<0. Same reason as statement 1. xy will only be 0.
Sufficient.

Answer: D

I somehow don't like this problem. Thought it would be challenging before reading it, but i feel that this problem is missing some crux.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
Master | Next Rank: 500 Posts
Posts: 434
Joined: Mon Jun 11, 2007 9:48 pm
Location: Bangalore
Thanked: 6 times
GMAT Score:600

by viju9162 » Fri Dec 04, 2009 2:49 am
I cant identify option A, Can you post that again?
"Native of" is used for a individual while "Native to" is used for a large group
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Senior | Next Rank: 100 Posts
Posts: 85
Joined: Tue Sep 02, 2008 12:13 am
Thanked: 1 times
GMAT Score:650

by vzzai » Sat Sep 24, 2011 6:46 pm
IMO this question is not framed correctly. Please let me know if my understanding is wrong.

I solved in this method.

6xy=x^2y+9y
6xy=y(x^2+9)
6x=x^2+9

x^2-6x+9 = 0
x=3

rephrased the question to, If x=3, what is xy?

So, to solve xy we need the value of y.
Both statements give value of x but not y. So, I went for E.

Please provide explanation. Thank you so much.
Thank you,
Vj
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1