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 →

PowerPrep DS Question

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Source: — Data Sufficiency |
User avatar
Community Manager
Posts: 789
Joined: Sun Jan 28, 2007 3:51 pmFollowed by: 1 member
Location: Silicon valley, California
Thanked: 30 times

Re: PowerPrep DS Question

by jayhawk2001 » Mon Jul 02, 2007 9:28 pm
jrbrown2 wrote:Is RST = 1?

(1) RS = 1
(2) ST = 1

Please give an explanation.
1 - insufficient. value of RST is dependent on the value of T

2 - insufficient. value of RST is dependent on the value of R

Together, there are multiple possibilities

R=S=1 & S=T=1 which gives RST = 1

R=S=-1 & S=T=-1, which gives RST = -1

S=1/R & S = 1/T, which gives RST = 1/T

Hence insufficient. Is it E ?
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Master | Next Rank: 500 Posts
Posts: 103
Joined: Sun Jun 10, 2007 7:10 pm
Location: Brooklyn, NY
Thanked: 2 times

by jrbrown2 » Tue Jul 03, 2007 6:48 am
OA is E....Good explanation
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Senior | Next Rank: 100 Posts
Posts: 69
Joined: Wed Apr 25, 2007 1:38 amFollowed by: 1 member

by discreet » Fri Jul 06, 2007 12:13 am
I think I have seen this question somewhere...Is it from OG 11 too?

Anyway,Jayhawk's explanation is perfect...

Just to add to that...Jayhawk has picked integer values for the variables.Sometimes,it may lead to incorrect answers.However,the statements are insufficient in all situations...

One more way to look at it...

Is RST = 1 ?
(1) says RS=1

Now,Imagine that R=1/2 and S is 2 => RS =1 and T can take any value.So, 1 alone is insufficient.

(2) same exaplantions as 1...u can assign S=2 again and
T to 1/2.Product is 1 but R can take any value.So,Insufficient.

Now taking two statements together....assume the same values as above !
R=1/2,S=2,T=1/2...Product RST is not 1 but RS,ST = 1.Hence,insufficient
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1