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.

★★★★★5.0559 reviews
GMATBootcamp Starts Sep 21
Chris Peckover, Target Test Prep GMAT expert
LIVE ONLINE BOOTCAMP

Live Online Bootcamp Class with Top GMAT Expert Chris Peckover

Sep 21 to Oct 9, 2026

Schedule
Mon to Fri · 7:00 to 10:00 PM ET
Included
Live classes + 6 months of TTP OnDemand
  • Boost your GMAT score in less than one month in a live online class
  • 6 months access to TTP OnDemand video courses included
View bootcamp & enroll
Limited cohort · enrollment openTarget Test Prep
EALiveTeach 5 seats left
Logan Thompson
EXECUTIVE ASSESSMENT

Sep 6 to Dec 6, 2026

with Logan Thompson

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
Limited cohort · enrollment openTarget 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 559 reviewsTarget Test Prep

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

og math 137..heavy division

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Legendary Member
Posts: 789
Joined: Sun May 06, 2007 1:25 amFollowed by: 6 members
Location: Southern California, USA
Thanked: 15 times
by resilient » Tue Feb 05, 2008 10:06 pm
a bar over a sequence of digits in a decimal indicates that the sequence repeats indefinitely.

what is the the value of (10^4-10^2) (.0012)? "bar of 12"


I got (10000-100)(.0012)=11.7800 closest answer was E. HA HA but there has to be easier way..cheers

a. 0
b..12 Bar over 12
c.1.2
d.10
e.12


I think there is a way of heavy division and multiplication that can make this much easier than my approach. I got the answer right but is there an easier way for this.

QA is E
Appetite for 700 and I scraped my plate!
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Source: — Problem Solving |
User avatar
Legendary Member
Posts: 519
Joined: Sat Jan 27, 2007 7:56 am
Location: India
Thanked: 31 times

Re: og math 137..heavy division

by Neo2000 » Wed Feb 06, 2008 12:01 am
Enginpasa1 wrote:a bar over a sequence of digits in a decimal indicates that the sequence repeats indefinitely.

what is the the value of (10^4-10^2) (.0012)? "bar of 12"

I got (10000-100)(.0012)=11.7800 closest answer was E. HA HA but there has to be easier way..cheers

QA is E
In your approach, you've neglected the bar which is incorrect.

Instead
(10^4-10^2) (.0012)? "bar of 12"
Take 10^2 common you get
10^2(10^2-1) (.0012)? "bar of 12"
Which gives you
(10^2-1) (.12)? "bar of 12"
which is
[100-1] (.12)? "bar of 12"
which equals
12.12"bar of 12" - (.12)"bar of 12"
which is Exactly = 12
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
GMAT Instructor
Posts: 3225
Joined: Tue Jan 08, 2008 2:40 pmFollowed by: 614 members
Location: Toronto
Thanked: 1710 times
GMAT Score:800

by Stuart@KaplanGMAT » Wed Feb 06, 2008 1:36 am
When the answer choices are spread out, estimation is a great way to answer questions

(10000 - 100) is pretty close to 10000.

10000 * (.00121212121212...) = 12.12121212...

pick (e) 12
Image

Stuart Kovinsky | Kaplan GMAT Faculty | Toronto

Kaplan Exclusive: The Official Test Day Experience | Ready to Take a Free Practice Test? | Kaplan/Beat the GMAT Member Discount
BTG100 for $100 off a full course
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Master | Next Rank: 500 Posts
Posts: 328
Joined: Thu Aug 07, 2008 5:25 pm
Location: Philadelphia
Thanked: 4 times
GMAT Score:550

by Abdulla » Mon Nov 09, 2009 6:27 pm
Guys, my approach was similar to the OG's but I think there is a typo there or I need to take a break.

(10^4 - 10^2)(0.0012 bar)
10^4 (0.0012 bar) - 10^2 (0.0012 bar)
10000 (0.0012 bar) - 100 (0.0012 bar)
12 - 0.12= 11.88 ..

10^4 times 0.0012 should moves the decimal 4 places to the right, so what is my mistake?
Abdulla
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
GMAT Instructor
Posts: 3225
Joined: Tue Jan 08, 2008 2:40 pmFollowed by: 614 members
Location: Toronto
Thanked: 1710 times
GMAT Score:800

by Stuart@KaplanGMAT » Mon Nov 09, 2009 7:31 pm
Abdulla wrote:Guys, my approach was similar to the OG's but I think there is a typo there or I need to take a break.

(10^4 - 10^2)(0.0012 bar)
10^4 (0.0012 bar) - 10^2 (0.0012 bar)
10000 (0.0012 bar) - 100 (0.0012 bar)
12 - 0.12= 11.88 ..

10^4 times 0.0012 should moves the decimal 4 places to the right, so what is my mistake?
Your mistake is that you're ignoring the repeating decimal.

10000(.0012 bar) = 12.12(bar), not 12.

Similarly, 100(.0012bar) = .12(bar), not .12

So, we end up with:

12.1212121212121212... - .1212121212121212... = 12
Image

Stuart Kovinsky | Kaplan GMAT Faculty | Toronto

Kaplan Exclusive: The Official Test Day Experience | Ready to Take a Free Practice Test? | Kaplan/Beat the GMAT Member Discount
BTG100 for $100 off a full course
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Master | Next Rank: 500 Posts
Posts: 328
Joined: Thu Aug 07, 2008 5:25 pm
Location: Philadelphia
Thanked: 4 times
GMAT Score:550

by Abdulla » Mon Nov 09, 2009 8:30 pm
Thanks Stuart..

It's clear now.
Abdulla
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Master | Next Rank: 500 Posts
Posts: 199
Joined: Sat Oct 24, 2009 4:43 pm
Thanked: 22 times
GMAT Score:710

by palvarez » Mon Nov 09, 2009 8:56 pm
Here is a little trick ya can pull off.

0.111.. = 1/9
0.121212.. = 12/99
0.123123123... = 123/999

0.030303.. = 03/99
0.0121212.. = 012/990
0.00121212.. = 0012/9900

10^4 - 10^2 = 9900

Look at the last fraction, the denominator is 9900, look at the 0's on numerator as well as on denominators side as well.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1