*Gumball Machine Problem from Brian Marks on Vimeo*

This problem is a little puzzle to get your students thinking, estimating, and calculating. We've given you a pdf file with only a picture of the gumball machine to use for estimating.

- How many gumballs are there?
- At $0.25 per ball, how much will it cost me to buy them all?
- How long will buying them all take?