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 →

Set S

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Master | Next Rank: 500 Posts
Posts: 125
Joined: Mon Dec 15, 2008 9:24 pm
by joyseychow » Thu Aug 06, 2009 3:32 am
Set S consists of n distinct positive integers, none of which is greater than
12. What is the greatest possible value of n if no two integers in S have a
common factor greater than 1?

(A) 4
(B) 5
(C) 6
(D) 7
(E) 11

OA is C. Why not [spoiler]B? Since there is only 5 primes between 1-12.[/spoiler]
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Source: — Problem Solving |
Master | Next Rank: 500 Posts
Posts: 487
Joined: Fri Mar 27, 2009 5:49 am
Thanked: 36 times

Re: Set S

by dtweah » Thu Aug 06, 2009 3:42 am
joyseychow wrote:Set S consists of n distinct positive integers, none of which is greater than
12. What is the greatest possible value of n if no two integers in S have a
common factor greater than 1?

(A) 4
(B) 5
(C) 6
(D) 7
(E) 11

OA is C. Why not [spoiler]B? Since there is only 5 primes between 1-12.[/spoiler]
S= (1,2,3,5,7,11).
No two integers in the set above have a common factor greater than 1. Remeber 2 is the only even prime interger.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Legendary Member
Posts: 527
Joined: Mon Jun 02, 2008 9:14 am
Location: Atlanta
Thanked: 17 times

Re: Set S

by pandeyvineet24 » Thu Aug 06, 2009 8:15 am
joyseychow wrote:Set S consists of n distinct positive integers, none of which is greater than
12. What is the greatest possible value of n if no two integers in S have a
common factor greater than 1?

(A) 4
(B) 5
(C) 6
(D) 7
(E) 11

OA is C. Why not [spoiler]B? Since there is only 5 primes between 1-12.[/spoiler]

did you forget "1" ? there could be 5 primes and number 1 in the set.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Master | Next Rank: 500 Posts
Posts: 125
Joined: Mon Dec 15, 2008 9:24 pm

by joyseychow » Wed Aug 12, 2009 9:00 pm
Oh, my mistake. Didn't see that. :oops:
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1