Re: a riddle because I'm bored.
Try this one.
A prisoner is faced with a decision where he must open one of nine doors. The rooms behind each door may be empty or contain either a lady or a tiger.
If the prisoner opens a door to find a lady he will marry her and if he opens a door to find a tiger he will be eaten alive. The prisoner would prefer to be married than either be eaten alive or to face emptiness. Each door has a sign bearing a statement which may be either true or false.
The statements on the nine doors are:
1. The lady is an odd-numbered room
2. This room is empty
3. Either sign 5 is right or sign 7 is wrong
4. Sign 1 is wrong
5. Either sign 2 or sign 4 is right
6. Sign 3 is wrong
7. The lady is not in room 1
8. This room contains a tiger and room 9 is empty
9. This room contains a tiger and sign 6 is wrong
In addition, the prisoner is informed that only one room contains a lady; each of the others either contain a tiger or are empty. The sign on the door of the room containing the lady is true, the signs on all the doors containing tigers are false, and the signs on the doors of empty rooms can be either true or false.
The prisoner is told whether or not room eight is empty and this knowledge helps him find a unique solution.
Which room has the lady?
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