why do some websites ask you to type what you see or solve math problems and say we need to know you are human?

Question

I went to dub happy and it asked me to do math so they know I'm human. I also went to urban rivals and it asked me to type what I see for the same thing.
why do they do this?! is it some kind of joke?

Answer 1

Wright. There are programs especially developed for hackers that can run thousand of mails, answers on a minute so most of the websites use this Captcha system to prevent that the answer/inscription comes from a program or non-human.



See also here:





http://en.wikipedia.org/wiki/CAPTCHA

Answer 2

These are called captcha



Not everyone in the the internet is human. Some are bots. Bots are programs desinged to do a specific task, like, create 90000000000 email addresses a day. To prevent these, websites created some random tests to make sure that you are human, not some bot trying to over run the server.

Answer 3

It's to keep the bots of the site.........that want only individuals....not robots.........