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 →

connection between 12 and 21 ?

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Source: — Problem Solving |
Legendary Member
Posts: 1153
Joined: Wed Jun 20, 2007 6:21 amFollowed by: 2 members
Thanked: 146 times

Re: connection between 12 and 21 ?

by parallel_chase » Mon Jul 21, 2008 3:28 pm
desiguy wrote:whats the connection between 12 and 21 ?

ans: 1/3

how ?
Only connection that I know is both are divisible by 3 and both are 9 integers apart from each other on the number line.

Also
12/21 = 4/7 if you subtract 3 from numerator and denominator you will get 1/3

OK now seriously this cant be a question. There is something definitely wrong with it.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
Master | Next Rank: 500 Posts
Posts: 200
Joined: Sun Jun 17, 2007 10:46 am
Location: Canada
Thanked: 9 times

Re: connection between 12 and 21 ?

by beeparoo » Wed Jul 23, 2008 1:16 pm
parallel_chase wrote: OK now seriously this cant be a question. There is something definitely wrong with it.
That's cause the FULL question is not typed out. The "connection" is actually a defined in the problem as something like "the lowest common multiple of both integers divided by their products". I know this question because it's been posted here so many times.

Seriously? Have the decency to write out the full question if you want help with your problems.
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 Jul 23, 2008 1:41 pm
Yes, most of the question is in fact missing.

This is a "wacky definition" question, in which the term "connection" is defined solely for the purpose of this particular question. Without the definition, there is no possible way to answer the question.
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
Senior | Next Rank: 100 Posts
Posts: 30
Joined: Sun Dec 17, 2006 1:53 pm
Location: London
Thanked: 7 times

by gmatutor » Wed Jul 23, 2008 2:12 pm
Is there such a question that exists on the actual GMAT or in OG material? If so I would be interested in reading it. I have seen question that ask about Fermat primes, but that is not a made up concept.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY

GMAT/MBA Expert

User avatar
GMAT Instructor
Posts: 2623
Joined: Mon Jun 02, 2008 3:17 amFollowed by: 355 members
Location: Montreal
Thanked: 1090 times
GMAT Score:780

by Ian Stewart » Thu Jul 24, 2008 8:35 am
gmatutor wrote:Is there such a question that exists on the actual GMAT or in OG material? If so I would be interested in reading it. I have seen question that ask about Fermat primes, but that is not a made up concept.
The 'connection' is actually not a made up concept either; it's just not very useful, since it's always equal to the reciprocal of the GCD (because the LCM*GCD = Product). The GMAT question that immediately comes to mind in this vein is the question about the 'length' of an integer, and if I recall correctly, that question is from GMATPrep- I might be wrong about that. The length, again, is a real math term,- it's interesting to see questions about Fermat Primes, lengths of integers, the golden ratio, etc- the questions are definitely prepared by mathematicians.
For online GMAT math tutoring, or to buy my higher-level Quant books and problem sets, contact me at ianstewartgmat at gmail.com

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