Well, Captcha, I must not be human.

[NorthernChaosGod]

translation of scanned images

I don't think that applies here.

[Freya]

I remember there being some Captcha thing that was cute animals. Like it showed a few pictures of cute animals and you just wrote out what they were for the verification check. :3

[Jiro]

What I don't understand is why the smurf the words or letters have to be so damn hard to read. I can't smurfing understand them half the time.

Maybe I'm a robot guys

[rubah]

I don't think that applies here.

well, it's not just robots doing the breaking. It's also low-paid humans. Otherwise, Loony BoB's trick question in the registration page would leave us spammer free. It's the same concept as your math idea