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 →

DS princeton - pls clarify the off. explanation

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Source: — Data Sufficiency |
User avatar
Master | Next Rank: 500 Posts
Posts: 423
Joined: Thu Dec 27, 2007 1:29 amFollowed by: 2 members
Location: Hyderabad, India
Thanked: 36 times
GMAT Score:770

by simplyjat » Sun Jun 01, 2008 7:58 pm
That is the intentional gotcha here...

Statement 1 says xy = y^2. and you interpreted it as x = y and this particular interpretation is wrong. xy = y^2 can be true even when y = 0 and in that case x may not be equal to y
simplyjat
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Newbie | Next Rank: 10 Posts
Posts: 2
Joined: Mon Jun 02, 2008 1:49 am

by imranme318 » Mon Jun 02, 2008 2:18 am
XY=Y^2 ===>XY=Y*Y or -Y*-Y so X=+-Y

X^2=Y^2===>+-X=+-Y ....So Both statements are required here to answer....!
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY

GMAT/MBA Expert

User avatar
GMAT Instructor
Posts: 2623
Joined: Mon Jun 02, 2008 3:17 amFollowed by: 355 members
Location: Montreal
Thanked: 1090 times
GMAT Score:780

by Ian Stewart » Mon Jun 02, 2008 2:51 pm
imranme318 wrote:XY=Y^2 ===>XY=Y*Y or -Y*-Y so X=+-Y

X^2=Y^2===>+-X=+-Y ....So Both statements are required here to answer....!
This isn't right. If x*y = y*y, then we can divide by y if y is not zero. In that case x=y; otherwise y=0. There is no reason to concern yourself with the possibility that x = -y; that will *not* be true except when x=0 *and* y=0.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1