Here is an attempt to be humorous:
Q: What did Ethan say to the piece of pie?
A: I don't know, probably something irrational!
i and pi got in an argument... i said to pi "get rational." Pi said to i "get real."
(not me)
Q: What did Jeremy say to Ethan?
A: you must be half a person cause im twice as cool as you.
because .5 x 2 = 1 (im one person)
Q: why did Ms. Mariners math class all get fat?
A: She told us the pie would never end!
Q: what did the bank tell Ethan?
A: If your looking for interest your at the wrong place...cause we have none for you!
That's about all i can come up with (sorry Ethan). There are plenty of other good jokes out in the internet. This is one i particularly liked...
http://www.edudemic.com/is-this-the-root-of-all-evil-math-humor/
http://images4.fanpop.com/image/photos/20700000/Math-Jokes-math-20787076-550-400.jpg
http://katharinefrank.files.wordpress.com/2011/09/algebra.jpg
And my favorite:
http://media-cache-ec0.pinimg.com/236x/c0/61/2d/c0612dd212f70bd39c317e09e402d6ca.jpg
