The last digit of pi

The Answer:

Pi is an irrational number. As such, it has no final digit. Furthermore, there is no pattern to its digits. But for what it's worth, here are the first thousand digits of pi.

This is a plot element in the classic Star Trek episode "Wolf in the Fold," in which Spock tricks the evil "Redjac" into spending its time trying to figure out the last digit of pi.

-The Fact Monster