kekeke~ I shall give another simple one....
There are three sealed boxes of the same size and each are labelled as follows:
$1, $0.50, $1&$0.50.
One box is filled with $1 coins, another box is filled with $.50 coins, the last box is filled with both $1 and $.50 coins.
However, they are all wrongly labelled.
If you are only allowed to take one coin from one box, is it possible to know which box contains the $1 coins???
Edit: If possible, HOW?