It is currently 21 Feb 2018, 12:42

# Live Now:

How Cutting Corners KILLS Your GMAT - Live on YouTube

### 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

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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# If the operation # is defined by x # y = sqrt xy for all

 post reply Question banks Downloads My Bookmarks Reviews Important topics
Author Message
Intern
Joined: 23 May 2008
Posts: 48
If the operation # is defined by x # y = sqrt xy for all [#permalink]

### Show Tags

15 Sep 2008, 17:54
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

If the operation # is defined by x # y = sqrt xy for all positive numbers x and y, then (5 # 45) # 60 = ???? (OG)
Director
Joined: 23 Sep 2007
Posts: 782
Re: More Algebraic Expressions [#permalink]

### Show Tags

15 Sep 2008, 18:14
snowbirdskier wrote:
If the operation # is defined by x # y = sqrt xy for all positive numbers x and y, then (5 # 45) # 60 = ???? (OG)

30

break your numbers down to primes
Intern
Joined: 25 Mar 2006
Posts: 9
Location: Kolkata, India
Re: More Algebraic Expressions [#permalink]

### Show Tags

16 Sep 2008, 04:21
(5#45)#60 = sqrt[ sqrt(5*45) * 60] = sqrt[5*3*60] = sqrt(900) = 30.
Re: More Algebraic Expressions   [#permalink] 16 Sep 2008, 04:21
Display posts from previous: Sort by

# If the operation # is defined by x # y = sqrt xy for all

 post reply Question banks Downloads My Bookmarks Reviews Important topics

Moderator: chetan2u

 Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne 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®.