One popular type of captcha is the slide and fit captcha. You need to slide a shape to fit into the gap in the picture. Easy enough. What amuses me is that most of them (including this one by geetest) show a note at the end stating what your timing was and how it compared to other 'users'. I wonder if this is sensible - are bots faster than humans at doing this slide? Or are you faster than humans?
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