Drexel dragonThe Math ForumDonate to the Math Forum



Search All of the Math Forum:

Views expressed in these public forums are not endorsed by Drexel University or The Math Forum.


Math Forum » Discussions » Math Topics » geometry.puzzles.independent

Topic: coins problem
Replies: 7   Last Post: Jun 16, 2009 10:34 PM

Advanced Search

Back to Topic List Back to Topic List Jump to Tree View Jump to Tree View   Messages: [ Previous | Next ] Topics: [ Previous | Next ]
Barco You

Posts: 1
From: Shanghai, China
Registered: 6/16/09
Re: coins problem
Posted: Jun 16, 2009 10:34 PM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

I also have the same puzzle, why cannot find one odd coin in (3^n-1)/2 coins with n weighings?

Here I have another problem, saying "we have two same appearance coins, knowing one is standard, one is odd but don't know it is weight or light. weigh them with two-pans, seems we can not find the odd coin forever?"



Point your RSS reader here for a feed of the latest messages in this topic.

[Privacy Policy] [Terms of Use]

© Drexel University 1994-2014. All Rights Reserved.
The Math Forum is a research and educational enterprise of the Drexel University School of Education.