I'm planning on writing a piece about math so I thought I'd survey my readers.
I assume that most of my readers took a lot of math in high school and college. Of all the math you learned, what parts of it do you use today as you do your system administration?
For example, of all the statistics I learned, pretty much all I actually use now is standard deviation. (and I just use it in analogies I make)
What path of your math education do you use today?