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 →

Greater common divisior

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Source: — Data Sufficiency |
Legendary Member
Posts: 2467
Joined: Thu Aug 28, 2008 6:14 pmFollowed by: 11 members
Thanked: 331 times

by cramya » Thu Dec 18, 2008 11:57 am
I am getting B)

Stmt II

a=3b

a will have one extra 3 and all the factors of b so b will be gcd of a and and b

SUFF

Stmt I

a= 3b+6
b=6 a = 24

YES

b=12 a=42

NO

INSUFF

Whats the OA?
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Senior | Next Rank: 100 Posts
Posts: 95
Joined: Fri Sep 28, 2007 10:16 am
Thanked: 6 times
GMAT Score:710

by muzali » Thu Dec 18, 2008 12:08 pm
given: a and b are both divisible by 6

Stm1: a=3b+6
or (a/3)=b+2
because of this "+2" it is insuff to conclude that b is the gcd of (a,b)

Stm2: a=3b
suff because b will be the gcd of (3b,b) i.e., (a,b)

ans:B
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Master | Next Rank: 500 Posts
Posts: 377
Joined: Wed Sep 03, 2008 9:30 amFollowed by: 2 members
Thanked: 15 times

by schumi_gmat » Thu Dec 18, 2008 12:30 pm
B for me too.

a= 3b
if b = 6, a = 18 and GCD = 6

b= 12, a = 36 and GCD = 12

Hence B
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1