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 →

GCD

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Master | Next Rank: 500 Posts
Posts: 168
Joined: Thu Nov 13, 2008 4:34 am
Location: Pittsburgh
Thanked: 9 times
by Tryingmybest » Wed Mar 25, 2009 7:34 am
What is the greatest common factor of positive integers x and y?

(1) The greatest common factor of x/2 and y/2 is 5.
(2) x and y are even.


OA after some discussions
Last edited by Tryingmybest on Wed Mar 25, 2009 3:29 pm, edited 1 time in total.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Source: — Data Sufficiency |
User avatar
Master | Next Rank: 500 Posts
Posts: 467
Joined: Thu Nov 06, 2008 10:19 pmFollowed by: 1 member
Thanked: 27 times

Re: GCD

by karmayogi » Wed Mar 25, 2009 7:53 am
Tryingmybest wrote:What is the greatest common factor of positive integers x and y?

(1) The greatest common factor of and is 5.
(2) x and y are even.


OA after some discussions
I guess, statement#1 has typo error. If no error then IMO E :)
Each soul is potentially divine. The goal is to manifest this divine within.
--By Swami Vivekananda
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Master | Next Rank: 500 Posts
Posts: 168
Joined: Thu Nov 13, 2008 4:34 am
Location: Pittsburgh
Thanked: 9 times

by Tryingmybest » Wed Mar 25, 2009 4:20 pm
Sorry.... edited the post now
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Senior | Next Rank: 100 Posts
Posts: 43
Joined: Fri Jul 18, 2008 9:20 pm
Thanked: 2 times
GMAT Score:770

by Mustang » Wed Mar 25, 2009 4:46 pm
IMO A

if GCD of x/2 and y/2 is 5 then essentially we are multiplying both (x/2) and (y/2) by 2 to get x and y. therefore 2 becomes a common factor of both x and y and so the GCD of x and y will be 2* [GCD of (x/2) and (y/2)].
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Master | Next Rank: 500 Posts
Posts: 168
Joined: Thu Nov 13, 2008 4:34 am
Location: Pittsburgh
Thanked: 9 times

by Tryingmybest » Thu Mar 26, 2009 7:23 am
OA A
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1