Tattoos

Euler is one of your favourite topics.

To make things interesting:

We should take a number of important areas of mathematics (Previously agreed upon) and placed them in a hat.
You can draw the topic.
Then we'll sit down and work through it.

NB. I'll let you include Euler in the options, potentially, you could even work out the probability of drawing it from the tifter.

This sounds like cool idea, definitely:

http://www.lfgss.com/post1509239-36.html