100 Re/Captcha

Re/Captcha is an automated tool to test if the website user is really a human and not an automated bot

https://www.youtube.com/watch?v=o0yQ-2Sgqk4

Robots Baffled?

https://www.youtube.com/watch?v=4UuvwY6CdLo

Demo:

https://www.google.com/recaptcha/api2/demo