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

It is currently 24 Jul 2014, 04:22

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

m02#29

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
Intern
Intern
avatar
Joined: 06 Feb 2012
Posts: 2
Followers: 0

Kudos [?]: 0 [0], given: 1

GMAT Tests User
m02#29 [#permalink] New post 12 Feb 2012, 18:33
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
Is x=x^2?

(1) x does not equal 0.
(2) x > 1

Okay, so I agree with x > 1 being sufficient, however, I think the answer is D, both statements alone are sufficient.

For statement 1: If x does not equal zero, then we can divide by x, hence x =1 an we know x = x^2. Thoughts?
[Reveal] Spoiler: OA

Last edited by Bunuel on 13 Feb 2012, 04:58, edited 1 time in total.
Edited the question
Expert Post
1 KUDOS received
Math Expert
User avatar
Joined: 02 Sep 2009
Posts: 18714
Followers: 3238

Kudos [?]: 22300 [1] , given: 2612

Re: m02#29 [#permalink] New post 13 Feb 2012, 05:10
1
This post received
KUDOS
Expert's post
Is x=x^2?

x=x^2 holds true for x=0 or x=1 (x=x^2 --> x^2-x=0 --> x(x-1)=0 --> x=0 or x=1). So basically the question asks whether x is one of these two values.

(1) x does not equal 0. So one value is out but x can be 1 as well as any other number (except 0). Not sufficient.
(2) x > 1 --> x neither 0 nor 1, so the answer to the question is NO. Sufficient.

Answer: B.


robertian23 wrote:
Okay, so I agree with x > 1 being sufficient, however, I think the answer is D, both statements alone are sufficient.

For statement 1: If x does not equal zero, then we can divide by x, hence x =1 an we know x = x^2. Thoughts?


Question asks: "is x=x^2?", since for (1) x does not equal 0 then, yes, you can divide by it and the question becomes: "is x=1?" (We are asked to determine whether x=x^2 is true and you've taken this as given statement).

Hope it's clear.
_________________

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

Get the best GMAT Prep Resources with GMAT Club Premium Membership

Intern
Intern
avatar
Joined: 06 Feb 2012
Posts: 2
Followers: 0

Kudos [?]: 0 [0], given: 1

GMAT Tests User
Re: m02#29 [#permalink] New post 13 Feb 2012, 05:41
Makes sense now. Thanks!
Re: m02#29   [#permalink] 13 Feb 2012, 05:41
Display posts from previous: Sort by

m02#29

  Question banks Downloads My Bookmarks Reviews Important topics  

Moderators: Bunuel, WoundedTiger



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®.