You have a candle, a box of thumbtacks, and a book of matches. You have to fix the lit candle to the wall so that it will not drip wax onto the floor below. How do you do it?
Attach the box of thumbtacks to the wall with one of the tacks, then stand the candle up in the box. That way, when you light it, the melted wax will drip into the box, rather than onto the floor.


