Welcome to MindCipher, a social repository of the world's greatest brain teasers, logic puzzles and mental challenges.

Timmmm

Likes 0

Timmmm must be new here...

Comments 2

Prisoners and hats

The question is badly worded. If they guess the colour of their hat they go free, but if they get it wrong, only that prisoner is forced to stay behind.

Otherwise it is clearly impossible.

context
Balloon in an Elevator

It will rise quicker than it would otherwise have, for fairly obvious reasons.

context