[CrackMonkey] A cool problem:

[Seth David Schoen]

Emad El-Haraty writes:

> What are these types of problems called... not brain teasers?

I call them pill-weighing problems and hat-color problems. :-)

If you like them, you should read books by Martin Gardner, Raymond Smullyan,
and some of the people they cite in their bibliographies.  Maybe A. K.
Dewdeney, maybe Douglas Hofstadter.

-- 
Seth David Schoen <schoen at loyalty.org>  | And do not say, I will study when I
Temp.  http://www.loyalty.org/~schoen/  | have leisure; for perhaps you will
down:  http://www.loyalty.org/   (CAF)  | not have leisure.  -- Pirke Avot 2:5