Find all School-related info fast with the new School-Specific MBA Forum

It is currently 21 Sep 2014, 12:20

Close

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

The function f is defined for all positive integers n by the

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
VP
VP
avatar
Joined: 22 Nov 2007
Posts: 1102
Followers: 6

Kudos [?]: 125 [0], given: 0

GMAT Tests User
The function f is defined for all positive integers n by the [#permalink] New post 11 Mar 2008, 22:26
The function f is defined for all positive integers n by the following rule: f(n) is
the number of positive integers each of which is less than n and has no positive
factor in common with n other than 1. If p is any prime number, then f(p)=

p - 1
p - 2
(p + 1)/2
(p - 1)/2
2
Director
Director
avatar
Joined: 10 Sep 2007
Posts: 950
Followers: 7

Kudos [?]: 187 [0], given: 0

GMAT Tests User
Re: gprep functions [#permalink] New post 12 Mar 2008, 07:12
Answer should be P - 1.
All the numbers between 1 and P (excluding P) are less than P and has no positive factor in common with P other than 1 (because P is a prime number so factors other than 1 and P itself).

Answer A.
VP
VP
avatar
Joined: 22 Nov 2007
Posts: 1102
Followers: 6

Kudos [?]: 125 [0], given: 0

GMAT Tests User
Re: gprep functions [#permalink] New post 14 Mar 2008, 02:29
abhijit_sen wrote:
Answer should be P - 1.
All the numbers between 1 and P (excluding P) are less than P and has no positive factor in common with P other than 1 (because P is a prime number so factors other than 1 and P itself).

Answer A.


yes it is. it could be useful to try with numbers:

if P is 2 then we must have only 2 members: 1 and 2, so choice must be p-1
if P is 3 then we must have 1 and 2 as other members, so choice could be p-1 or p+1/2.

using both examples we would have p-1
Re: gprep functions   [#permalink] 14 Mar 2008, 02:29
    Similar topics Author Replies Last post
Similar
Topics:
3 Experts publish their posts in the topic The function f is defined for all the positive integers n by anilnandyala 3 28 Oct 2010, 07:27
The function f is defined for all positive integers n by the nfa1rhp 4 13 Nov 2008, 04:19
The function f is defined for all positive integers n by the tmuckens 1 28 Jul 2007, 18:46
The function f is define for all positive integers n by the myc2004 4 26 Feb 2006, 15:51
The function f is defined for all positive integers n by the Avis 5 20 Feb 2006, 16:39
Display posts from previous: Sort by

The function f is defined for all positive integers n by the

  Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Privacy Policy| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group and phpBB SEO

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.