Prisoner Hat Riddle Explained. An executioner will put a hat on each prisoners head. Starting at the back of the line the executioner asks the last prisoner to state the colour of his hat.
100 prisoners are lined up by an executioner who places a red or blue hat upon each of their heads. The three prisoners are ordered to stand in a straight line facing the front with A in front and C at the back. In all of those scenarios Prisoner A has a red hat so he is safe saying he is wearing a red hat.
Four prisoners named P1 P2 P3 and P4 are arrested for a crime but the jail is full and the jailer has nowhere to put them.
They cant speak to each other and they cant touch each other. The Answer is that Prisoner A had a red hat. See the link for a detailed description of why he knew but it essentially boiled down to him knowing that since the others didnt speak up the only possible scenarios were 1-4. Number 1 sees number 2 and 3s hats.
