The King’s Party

Now, this one took me quite a while to figure out. You are a knight (say, Knight of the North) who is attending the king’s part...

The Negotiation Game: Believe me, I'm crazy !

Can being crazy be helpful to anybody? Not if he’s really the only crazy person in a world full of rational * people. Being rational may...

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...

Probability: Catch the train !

A man arrives to a train station between 9:55 and 10:05 every morning and the train leaves the station between 10:00 and 10:10. What is t...

A match of cards

Now, this one's a really interesting puzzle. Players A and B each have a well shuffled standard pack of 52 cards. The players deal th...

Salary puzzle

Three co-workers would like to know their average salary. However, they don’t want to tell each other their own salaries, for fear of eithe...

Physics - the Centrifuge Problem

After so many mathematics and game theory puzzles, I've finally got some good physics puzzle to solve! I must say, although the world s...

Burning Island

This one's a copy paste from internet. Found it quite witty! The Puzzle:  A man is stranded on an island covered in forest.  One day,...

Flip

There are 128 coins sitting on the table , 96 are heads (heads side up) and 32 are tails. You are sitting at the table with a blindfold and...