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 » sci.math.* » sci.math

Topic: 12 billiard ball problem
Replies: 15   Last Post: Jan 4, 2013 12:07 PM

Advanced Search

Back to Topic List Back to Topic List Jump to Tree View Jump to Tree View   Messages: [ Previous | Next ]
H. Peter Anvin

Posts: 4
Registered: 12/12/04
Re: 12 billiard ball problem
Posted: Nov 18, 1997 6:53 PM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply



Followup to: <01bcf44e$fef00320$8de52ac2@jon>
By author: "Jonathan Pearce" <jvpearce@classic.msn.com>
In newsgroup: sci.math
>
> Does anybody know of an elegant solution to the twelve billiard ball
> problem?
>
> (Twelve apparently identical billiard balls, one of which is slightly
> heavier than the rest, determine which is the heavier one making only three
> weighings.)
>
> I would be very grateful for a reply.
>
> JVP.


Why make it so easy? Twelve billiard balls (gold bars, whatever...);
exactly one is *either* lighter *or* heavier than the others; find
which one it is *and* if it is lighter or heavier, in three
weighings by a balance scale.

My music teacher gave me this problem back in sixth grade. It's
solvable (and yes, I found the solution.)

-hpa
--
PGP: 2047/2A960705 BA 03 D3 2C 14 A8 A8 BD 1E DF FE 69 EE 35 BD 74
See http://www.zytor.com/~hpa/ for web page and full PGP public key
I am Bahá'í -- ask me about it or see http://www.bahai.org/
"To love another person is to see the face of God." -- Les Misérables







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.