Blue Eyes

A really interesting and thought provoking puzzle. I would be more interested in discussing the reasoning and implications of the solution ...

How will you pay a bill of exactly pi dollars?

I walk into a restaurant for lunch and my check comes to π dollars. The restaurant will only accept the exact amount -- nothing more, nothi...

Names in boxes - The most astonishing prisoner puzzle

The fact that there are so many mathematical puzzles and games around 'prisoners' and people condemned to a bad fate, makes us (pu...

Infinite hats puzzle

There are an infinite number of people with each having either a white hat or black hat on his head. Each person ca n  see everyone's h...