testing header
Math Goodies is a free math help portal for students, teachers, and parents.
Free Math
Newsletter
 
 
Interactive Math Goodies Software

Buy Math Goodies Software
testing left nav
Math Forums @ Math Goodies
Math Forums @ Math Goodies
Home | Profile | Register | Active Topics | Members | Search | FAQ
Username:
Password:
Save Password
Forgot your Password?

 All Forums
 Parent Forum
 Parent's Place
 need help on this please
 New Topic  Reply to Topic
 Printer Friendly
Author Previous Topic Topic Next Topic  

raghu
Senior Member

USA
37 Posts

Posted - 01/04/2008 :  08:53:45  Show Profile  Reply with Quote
The Band Committee of 100 people wishes to set up a telephone call system. The initial contact person calls three other people, each of whom call three others and so on, until all the people in the Band Committee have been contacted. What is the maximum number of people they need to make the calls.
I got the answer as 27 + 27 +9 + 9
But the answer according to the book is 66.

Go to Top of Page

Subhotosh Khan
Advanced Member

USA
9117 Posts

Posted - 01/07/2008 :  08:29:36  Show Profile  Reply with Quote
quote:
Originally posted by raghu

The Band Committee of 100 people wishes to set up a telephone call system. The initial contact person calls three other people, each of whom call three others and so on, until all the people in the Band Committee have been contacted. What is the maximum number of people they need to make the calls.
I got the answer as 27 + 27 +9 + 9
But the answer according to the book is 66.


According to my interpretation the answer should be 40.

1 person calls 3 people(total 4 contacted)
3 people call 9 people (total 13 contacted)
9 people call 27 people (total 40 contacted)
27 people call 60 people (total 100 contacted)

So you need (1+3+9+27 =) 40 people to make phone calls to contact 100 people.
Go to Top of Page

ejackson
Junior Member

USA
3 Posts

Posted - 02/22/2008 :  20:08:53  Show Profile  Reply with Quote
I also get 40, not 66. I'd be curious to hear the explanation for 66 if you find out.

EJ
Go to Top of Page
  Previous Topic Topic Next Topic  
 New Topic  Reply to Topic
 Printer Friendly
Jump To:
Math Forums @ Math Goodies © 2000-2004 Snitz Communications Go To Top Of Page
This page was generated in 0.06 seconds. Snitz Forums 2000
testing footer
About Us | Contact Us | Advertise with Us | Facebook | Blog | Recommend This Page




Copyright © 1998-2014 Mrs. Glosser's Math Goodies. All Rights Reserved.

A Hotchalk/Glam Partner Site - Last Modified 30 Oct 2014