28.7k views
48 ratings
4 saves
Question: A prison has 23 prisoners in 23 different cells. The prisoners have no way to communicate with each other in any way from their cells. There is another room, the rec room, that has two switches on the wall (A and B). The switches have on and off positions but they start in an unknown position.
Prisoners are randomly taken to and from the rec room one at a time. They must change the position of only one of the two switches each time they go to the room. At any point a prisoner can yell out, "Every prisoner has been here!" If the prisoner is correct that all of the prisoners have visited the rec room, then they all go free. If they aren't correct then they are all executed.
Before they start they are given one planning session during which they can discuss a method to win the game. What method can they use to ensure they all go free?
28 views
1 ratings
0 saves
By CTech
Question: What is the next sequence of numbers and why? 1 11 21 1211 111221 312211
2 views
5 ratings
0 saves
By Batman
Question: You build a house and all 4 walls are facing south. Where did you build the house?
4.8k views
5 ratings
0 saves
Question: A girl dove in the sea.. some say there are two people under the sea. Why is that?
4.8M views
6365 ratings
34 saves
Question: What tastes better than it smells?