brain teaser...

These 4 guys can only see in the direction that they are facing...

They cannot talk to each other...

A wall divides the 3 on the left from the guy on the right...

The guy on the right cannot see anything except the wall... the wall is solid...

They are told that there are 2 red hats and 2 yellow hats...

They do not know the colour of their own hat...

One of these guys can tell the colour of all the hats that each man is wearing...

Can you tell which guy can do this?

I'll think of something for a prize...