4GMAT - Online GMAT Preparation

GMAT Practice Tests, Classes, Free Quizzes
4GMAT Home | GMAT Classes | GMAT Math Books| GMAT Quant eBooks | GMAT Practice Questions
It is currently Thu Feb 09, 2012 6:53 am

View unanswered posts | View active topics


Board index » GMAT Math » GMAT Problem Solving

All times are UTC




Post new topic Reply to topic  Page 1 of 1
  [ 4 posts ] 
  Previous topic | Next topic 
Author Message
grkmurthy
 Post subject: Operations on Radical Expressions
PostPosted: Tue Nov 06, 2007 5:51 am 
Offline
Senior Consultant

Joined: Sun Oct 14, 2007 6:41 am
Posts: 37
What is the value of square root{ cube root(0.000729)}?

(1) 0.06

(2) 0.30

(3) 0.09

(4) 0.03

(5) 0.60


Last edited by grkmurthy on Tue Nov 20, 2007 5:17 am, edited 1 time in total.

Top
 Profile  
 
sid
 Post subject:
PostPosted: Tue Nov 06, 2007 6:20 am 
Offline
Associate

Joined: Tue Nov 06, 2007 6:11 am
Posts: 8
square root{ cube root(0.000243)}?

I think there is something wrong with the question.

square root is raising a number to the power of 1/2

Cube root is raising a number to the power of 1/3

we can write square root{ cube root(0.000243)}? as {(0.000243)^1/3}^1/2

which is (0.000243)^(1/6) which is {243 / 10^6}^1/6.
243 is 3^5 and not 3 ^ 6. So, we will not get any of the answers mentioned.
Top
 Profile  
 
grkmurthy
 Post subject: Operations on radical expressions
PostPosted: Wed Nov 07, 2007 6:37 am 
Offline
Senior Consultant

Joined: Sun Oct 14, 2007 6:41 am
Posts: 37
Yes sir, you are right. The number should be Square root{cube root(0.000729)}.
Top
 Profile  
 
sid
 Post subject:
PostPosted: Mon Nov 12, 2007 4:10 am 
Offline
Associate

Joined: Tue Nov 06, 2007 6:11 am
Posts: 8
then the answer will be 0.3. Choice (B).

Please confirm if that is the correct answer.
Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  Page 1 of 1
  [ 4 posts ] 

Board index » GMAT Math » GMAT Problem Solving

All times are UTC


Who is online

Users browsing this forum: No registered users and 0 guests

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
cron
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group

phpBB SEO