Chapter 8.5, Problem 18P

At the zoo, the birds must be fed 12 cups of sunflower seeds and 20 cups of millet seed every day. The zookeepers would like to find a container for scooping both the sunflower seeds and the millet seeds with. The container should allow the zookeepers to scoop out the proper amount of sunflower seeds and millet seeds by filling the container completely a certain number of times. What is the largest possible container the zookeepers could use? Use mathematical terms to describe the size of this container. Explain.