Jump to content

The Lever: A Logic Problem


Chaos Pudding

Recommended Posts

Guest Chaos Pudding

Um... No they cannot. >_>

 

Uh' date=' yeah they can. That's the whole point of them having a meeting.

[/quote']

 

0.0

orly

 

Then wouldn't one person come in after each prisoner and 'reset' the lever? That works.

 

No one enters the room except for the prisoners.

Link to comment
Share on other sites

During the meeting, the prisoners choose a person. This person will declare if everyone has seen the room. This person counts the number of prisoners and remembers this number n.

 

Anyone who enters the room will either leave if the lever if it is up, or flip the lever up if it is down. Only the selected person can turn the lever down. When the selected person pulls the lever down 2 x n times, he calls that everyone has been in the room.

 

2n is so if the switch is down originally, then each person flipped it up twice. If it was up originally, however, then 1 person would have only flipped it once, but if the leader flipped it n times, then that person may or may not have gone.

 

This is so Dark doesn't get it.

Link to comment
Share on other sites

Guest Chaos Pudding

During the meeting' date=' the prisoners choose a person. This person will declare if everyone has seen the room. This person counts the number of prisoners and remembers this number n.

 

Anyone who enters the room will either leave if the lever if it is up, or flip the lever up if it is down. Only the selected person can turn the lever down. When the selected person pulls the lever down 2 x n times, he calls that everyone has been in the room.

 

2n is so if the switch is down originally, then each person flipped it up twice. If it was up originally, however, then 1 person would have only flipped it once, but if the leader flipped it n times, then that person may or may not have gone.

 

This is so Dark doesn't get it.

[/quote']

 

Alright, that's 3 Reps for you, then.

Link to comment
Share on other sites

Archived

This topic is now archived and is closed to further replies.

×
×
  • Create New...