There is a village where everyone has a blue or red dot on their forehead. Every day at noon they all gather in the central square and look at each other. No one says anything, and after a couple of minutes they disperse, and if anyone can figure out their own dot color, they kill […]
There are 3 students lined up one behind the other, facing the front of the room. The teacher has 3 black hats and 2 white hats. The teacher puts 1 hat on each student randomly, and tells them whoever can say for sure what their hat color is gets an A for the semester.