9 + 10 = 21?

Not quite, but

e(9+10)πi = e21πi

So there. (If your household isn’t as steeped in the 9+10=21 meme as is mine, coming from my 10- and 11-year-olds and their school chums, see here. And, yes, there are other “proofs” that 9+10=21, too.)

Originally Found On: http://feeds.washingtonpost.com/c/34656/f/669424/s/48a0a140/sc/15/l/0L0Swashingtonpost0N0Cnews0Cvolokh0Econspiracy0Cwp0C20A150C0A80C0A10C90E10A0E210C/story01.htm