This problem is called the "100 Prisoners Problem", more info on the math here: http://en.m.wikipedia.org/wiki..../100_prisoners_probl
Thanks to http://www.ifixit.com for supporting us on Subbable!
and to Subbable supporter @vicnice137

And thanks to my friend Dan Hoff for introducing me to this problem!

MinutePhysics is on Google+ - http://bit.ly/qzEwc6
And facebook - http://facebook.com/minutephysics
And twitter - @minutephysics

Minute Physics provides an energetic and entertaining view of old and new problems in physics -- all in a minute!

Music by Nathaniel Schroeder http://www.soundcloud.com/drschroeder

Thanks to Nima Doroud for contributions. Created by Henry Reich