100 Hat Riddle Answer. An executioner will move from the back of the line and ask people to say what colour hat they are wearing. Starting at the back of the line the executioner asks the last prisoner to state the colour of his hat.
Here is the most common set-up of this question the so-called 100 hats riddle. TED Talk Subtitles and Transcript. They cannot see their own hat.
At-most 99 prisoners can be saved and the 100th prisoner has 50-50 chances of being executed.
All four prisoners will be freed if at least one of them correctly guesses the color of the hat on his head. If they get it right they live. Each prisoner wears a red or blue hat. A guard is going to walk down the line.