# An Impossible Bet | The 100 Prisoners Problem

This has nothing to do with physics, but I want to make a bet with you and 99 other people:
100 in total.
You'll all stand in a line, take a one dollar bill out of your pocket and write your position
in line on the bill.
Then I'll collect the bills, take them to a separate room, put each one into its own
one of 100 identical boxes, and randomly rearrange the boxes.
The game is this: each of you come into the room and try to find which box your bill is
in - but you're only allowed to come in one at a time, you're only allowed to peek in
half of the boxes, and you aren't allowed to change anything about the boxes or move
bills around.
If you find your own bill, great!
Show me that you've succeeded and then leave the bill in its box.
And regardless of whether or not you find your bill, you have to leave the room by a
different route so you can't tell anyone else what you've seen, and the room is then reset
before the next person comes in.
At the end, if all 100 of you have successfully found your own bills, you all win and I'll
give each of you a hundred dollars plus the one you started with!
But if any one of you doesn't find your billâ€¦
I keep all the dollars.
You are allowed to plan a strategy together with the other players before any of you come
into the room, but no communication afterwards.
The question is this: should you take the bet?
To recap, every person gets to look in half of the boxes, there's no communication between
players after they go into the room, and you only win if every single person finds their
own bill.
\$101 dollar payout if you win, nothing if you lose.
Take a moment to think about it, then click the links on screen or in the description
to make your choice - and find out what the correct answer is.