From: Dave Burt <dave@...>
Date: 2005-09-23T21:56:41+09:00
Subject: Re: [QUIZ] Math Captcha (#48)

> "What is fifty times 'a', if 'a' is three?" #=> 150
>
> Write a Captcha system that uses english-based math questions to 
> distinguish
> humans from bots.

Solutions to the past quiz entitled English Numerals may be handy for this 
one:

http://rubyquiz.com/quiz25.html

Cheers,
Dave