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M23 #35

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Re: If x is a positive integer, f(x) is defined [#permalink] New post 12 Aug 2013, 23:36
cyberjadugar wrote:
Hi,

If x is prime for example x = 5,
then f(x) will consist of (2, 3, 4) or x-2 integers

Thus, (A)

Regards,

-------------------------------------------------------------

Thanks for the help. In GMAT Club tests solution the explanation was in correct, to cross check it , I posted this question.

In GMAT Club solution , B was correct answer which was incorrect.

Thanks for the help.
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Re: If x is a positive integer, f(x) is defined [#permalink] New post 13 Aug 2013, 00:20
Expert's post
schittuluri wrote:
If x is a positive integer, f(x) is defined as the number of positive integers which are less than x and do not have a common factor with x other than 1. If x is prime, then f(x)=?


A)x−2
B)x−1
C)(x+1)2
D)(x−1)2
E)2


Merging similar topics.

Please read carefully and follow: rules-for-posting-please-read-this-before-posting-133935.html
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What are GMAT Club Tests?
25 extra-hard Quant Tests

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Joined: 02 Sep 2009
Posts: 17321
Followers: 2875

Kudos [?]: 18402 [0], given: 2350

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Re: If x is a positive integer, f(x) is defined [#permalink] New post 13 Aug 2013, 00:20
Expert's post
schittuluri wrote:
cyberjadugar wrote:
Hi,

If x is prime for example x = 5,
then f(x) will consist of (2, 3, 4) or x-2 integers

Thus, (A)

Regards,

-------------------------------------------------------------

Thanks for the help. In GMAT Club tests solution the explanation was in correct, to cross check it , I posted this question.

In GMAT Club solution , B was correct answer which was incorrect.

Thanks for the help.


The correct answer is B, not A.

Check here: rules-for-posting-please-read-this-before-posting-133935.html

Hope it helps.
_________________

NEW TO MATH FORUM? PLEASE READ THIS: ALL YOU NEED FOR QUANT!!!

PLEASE READ AND FOLLOW: 11 Rules for Posting!!!

RESOURCES: [GMAT MATH BOOK]; 1. Triangles; 2. Polygons; 3. Coordinate Geometry; 4. Factorials; 5. Circles; 6. Number Theory; 7. Remainders; 8. Overlapping Sets; 9. PDF of Math Book; 10. Remainders; 11. GMAT Prep Software Analysis NEW!!!; 12. SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) NEW!!!; 12. Tricky questions from previous years. NEW!!!;

COLLECTION OF QUESTIONS:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS ; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


What are GMAT Club Tests?
25 extra-hard Quant Tests

Re: If x is a positive integer, f(x) is defined   [#permalink] 13 Aug 2013, 00:20
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