The Poisoned Wine

How can you place 8 queens on a chessboard so that no queen can attack another?

You have 12 identical-looking coins, but one is either slightly heavier or lighter than the others. You have a balance scale and can use it only three times. How do you identify the false coin?

What runs but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?

What becomes more valuable the more it is broken?

A prisoner is told he will be hanged on a morning when he will not expect it. He reasons he cannot be hanged, but he is. How?

Four people need to cross a bridge at night. They have one torch. The bridge can only hold two people at a time. Person A takes 1 minute to cross, B takes 2 minutes, C takes 5 minutes, and D takes 10 minutes. How can they all cross in 17 minutes?