Homework for Week 1

This homework assignment deals with the last problem on the practice test, namely, if I multiply all the numbers from 1 to 100 together, how many zeros will be at the end of the answer. You do not need to actuall work out the product (which has 158 digits) to get the answer.

Hint: try a coupe of smaller examples (say, the numbers 1 to 10) to figure out what's going on.