### Project 9.3

The German artist Albrech Durer (1471-1528) is not only a Renaissance artist, but also somewhat of a mathematician. Do some research on the mathematics of Durer.

### Project 9.4 **Celebrate the Millennium **

**a.** Consider the product (1)(2)(3) … (1,998)(1,999)(2,000). What is the last digit?

**b.** Consider the product (1)(2)(3) … (1,998)(1,999)(2,000). From the product, cross out all even factors, as well as all multiples of 5.

Now, what is the last digit of the resulting product?