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

Redeem

Target Test Prep · GMAT

Choose how you want to prepare

Learn live with an expert or move at your own pace. Every option includes the complete TTP study system.

★★★★★5.0563 reviews
Newsweek Readers’ Choice Awards 2026 winner: Target Test Prep, #1 Test Prep
NEWSWEEK READERS’ CHOICE AWARDS 2026

Target Test Prep was voted #1 Best Test Prep in the 2026 Newsweek Readers’ Choice™ Awards.

GMATLiveTeach Starts Oct 17
Chris Peckover, Target Test Prep GMAT expert
LIVE ONLINE CLASSES

Get Ready for GMAT Test Day Faster with Live Online Classes

with Chris Peckover, 100th-Percentile GMAT Scorer

Oct 17 · Chris Peckover
Sat · 11:00 AM to 2:00 PM ET
Oct 20 · Chris Peckover
Tue, Thu · 8:00 to 10:00 PM ET
Oct 25 · Josh Braslow
Sun · 1:00 to 4:00 PM ET
Included
40 hours of live online classes + 6 months of TTP OnDemand
  • Attend the first class for free
  • Every class is recorded, so you never fall behind
View classes & enroll
Limited seats availableTarget Test Prep
EALiveTeachOnDemand 5 seats left Start anytime
EXECUTIVE ASSESSMENT

Target Test Prep EA OnDemand

Self-paced EA prep. Study on your schedule.

Logan Thompson
EXECUTIVE ASSESSMENT

Sep 6 to Dec 6, 2026

with Logan Thompson

165+ EA score guarantee
$05-day trial no automatic billing
Schedule
Sun · 9:30 AM to 12:30 PM ET
Included
40 hours of live online classes plus six months of access to the complete TTP EA OnDemand course.
  • 165+ EA Score Guarantee
  • 4,100+ Quant, Verbal, and Integrated Reasoning practice questions
  • 400+ hours of in-depth video lessons
  • 3,000+ step-by-step video solutions
View EA class & enroll Start free 5-day trial
Limited cohort · enrollment openTrial includes full course accessTarget Test Prep
GMATOnDemand Start anytime
SELF-PACED MASTERCLASS

Target Test Prep GMAT OnDemand

Complete access from day one. Study on your schedule.

715+ score guarantee
$0to start then $127/mo
  • Personalized study plan and analytics
  • Thousands of lessons and practice questions
Start free 5-day trial
Read 563 reviewsTarget Test Prep

Compare the format, schedule, and included access before enrolling. Prices and seat counts shown reflect the supplied offer details.

Greatest common Factor

Expert replies
Post new topic Post Reply
Subscribe topic
Previous Topic Next Topic
User avatar
Senior | Next Rank: 100 Posts
Posts: 54
Joined: Sat Jul 09, 2011 5:34 pmFollowed by: 1 member
Thanked: 1 times
by golu23 » Tue Jul 12, 2011 8:35 am
Guys can somebody explain me the concept of GCF i just started using manhattan gmat book it's the first topic in it.I did understood LCM but GCF is going way over my head
Top
Join the discussion
Source: — GMAT Strategy |
Master | Next Rank: 500 Posts
Posts: 401
Joined: Tue May 24, 2011 1:14 amFollowed by: 5 members
Thanked: 37 times

by MBA.Aspirant » Tue Jul 12, 2011 10:17 am
this video is helpful https://www.youtube.com/watch?v=J7K1BLaSX20

basically GCF is like LCM but you only take the prime factors that repeat

so GCF of 45 and 81

45= 3* 3 * 5
81 = 3 * 3* 3 *3

only 3 and a 3 repeat here, so GCF = 3 *3 = 9
Top
Join the discussion
Junior | Next Rank: 30 Posts
Posts: 29
Joined: Tue Jul 12, 2011 1:07 pmFollowed by: 1 member
Thanked: 8 times

by beatthegmat.garry » Tue Jul 12, 2011 1:30 pm
Right !

You can take the common factors out. Hence the name Greatest common factor.

GCF is the largest number that can be used to divide all the numbers(given in the questions) which results in an integer as the quotient.

Hope this helps :)!

Thanks.
Top
Join the discussion
User avatar
Senior | Next Rank: 100 Posts
Posts: 54
Joined: Sat Jul 09, 2011 5:34 pmFollowed by: 1 member
Thanked: 1 times

by golu23 » Sat Jul 16, 2011 1:47 am
Dude what does it have to do with ur electric wire rope hoist.Students r trying to study and help each other out.Plz Don't try to market ur products here.If u cant help na plz don't irritate us OK .
Top
Join the discussion