Question

☝ 4 prisoners are all going to be shot in 60 seconds unless one of them correctly calls out the colour of his own hat. if he's right everyone is free, but everyone gets shot if he's wrong. they are standing in the below configuration. they know how they are positioned and they know there are 2 black hats and 2 white hats. but they don't know the configuration of the hats. they can't communicate, they can't turn around and they can't see the colour of their own hat. so prisoner 1 can see 2 and 3. prisoner 2 can see 3. prisoner 4 is behind a wall so nobody can see him or be seen by him. no shadows, reflections, etc. after 45 seconds, someone calls out the correct colour of his hat. who is it and how does he know he is right?

Answer 1

Prisoner 1

because ,

He can saw 2,3 ,

Suppose if 2 & 3 are both with black or white cap

Then ultimately 1 & 4 are with white or black respectively