Math
posted by Sue on .
A floorfinishing machine uses bars of wax. Once the bar is worn down to 1/2 its original size, it must be replaced with a new bar. Only fullsize bars can be put in the machine. The pieces are melted and recycled to make fullsize bars. If you buy 24 bars and recycle all the pieces, how many fullsize bars can you use? How much wax will be left over? Your goal is to have as little wasted wax as possible.

24 + .5(24) + .25(24) + ....