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 →

Simple work problem question

Problem Solving — algebra and arithmetic (GMAT Focus Edition)
Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Newbie | Next Rank: 10 Posts
Posts: 9
Joined: Tue Feb 23, 2010 2:34 pm
by raj22 » Tue Feb 23, 2010 2:37 pm
guys

apologize if this is a very basic question but I was going to through the official book on page 141 and found an equation step that I don't get

1/6 + 1/R = 1/4

The next line shows
R+6/6R = 1/4

How did they reach the 2nd line? I know about bringing both sides of the equation to a common denominator but don't get how they are doing this

Thanks
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Source: — Quantitative Reasoning |
Senior | Next Rank: 100 Posts
Posts: 60
Joined: Wed Jan 07, 2009 1:56 pm
Thanked: 12 times
GMAT Score:750

by arzanr » Tue Feb 23, 2010 4:41 pm
raj22 wrote:guys

apologize if this is a very basic question but I was going to through the official book on page 141 and found an equation step that I don't get

1/6 + 1/R = 1/4

The next line shows
R+6/6R = 1/4

How did they reach the 2nd line? I know about bringing both sides of the equation to a common denominator but don't get how they are doing this

Thanks

This follows basic addition of fractions:

1/6 + 1/R

A common multiple of 6 and R would be 6R. Therefore, multiply the first fraction by R and the second by 6:

1(R)/6(R) + 1(6)/R(6)

Now you have a common denominator, so join the fraction:

[(1)(R)+(1)(6)]/R(6) = (R+6)/6R
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Newbie | Next Rank: 10 Posts
Posts: 9
Joined: Tue Feb 23, 2010 2:34 pm

by raj22 » Tue Feb 23, 2010 7:05 pm
dam, i knew the formula but just wasn't able to apply it. Stupid!

Thanks so much for your quick response
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1