>Hi,
>
>Usually I find Captcha on various blog sites very difficult to work with. I can't see well the letters or numbers that are shown in the picture; so I keep clicking on "show another." Recently, however, when I was looking at the blog of an asp.net guru his captcha was very easy to go through. The Captcha would ask a questions such as for example:
>12 - _____ = 7 or
>Eleven + ___ = Seventeen
>
>Basically the math that even I can understand and solve in my head <g>.
>
>Does anybody know if this type of Captcha is available and how do you get it?

Take a look at this http://lurkmore.to/Lurkmore:%D0%9C%D0%B0%D1%82%D0%B0%D0%BD%D0%BE%D0%B2%D0%B0%D1%8F_%D0%BA%D0%B0%D0%BF%D1%87%D0%B0

and then

http://habrahabr.ru/post/121032/

(in Russian).

I learned this from my husband's Life Journal