This question is about Haunt 52, and you really can't ask it without spoiling the haunt.
The players have to walk through the house figuring out that the rooms without traps follow a number pattern. However, even if you find the room that is supposed to be the exit, the instructions say nothing to the betrayer that he/she must inform the other players. As the number in the sequence was chosen randomly by the betrayer, it is pure luck if you just happen to be in the correct room at the end, even if you figure out the sequence. Does the betrayer have to tell the players when they find the exit room? Even if everyone is standing in a safe room when the game ends, the exit room was random. There seems to be no way to figure out which room it is... or am I missing something?