875
Bots are better than humans at cracking ‘Are you a robot?’ Captcha tests, study finds
(www.independent.co.uk)
This is a most excellent place for technology news and articles.
Both are right. The older ones with squiggly letters, numbers or that ask you to identify animals or objects were being used to train ai bots.
The ones that ask for crosswalks, bikes, overpass, signs etc are used to train self driving ai.