TED-Ed: Can you solve the prisoner hat riddle? - Alex Gendler

In a test by aliens, humans must guess the color of their hats to prove their logic. The game involves standing in a line and guessing based on the parity of visible hats. A strategy is devised where the first person communicates parity information, allowing others to deduce their hat color. This method ensures at least nine correct guesses, saving the group. The video explains the rules, strategy, and provides an example, demonstrating the effectiveness of the approach.

What is the main challenge presented by the aliens regarding the hats?

How does the first prisoner communicate information about the hats to the others?

What strategy do the prisoners use to determine the color of their hats?

What does the parity of the number of black hats signify in the prisoners' strategy?

What is the outcome for the prisoners if at least nine of them guess correctly?