these captchas seem like subtle iq tests. there's a hidden hierarchy to shapes
least likely to get paired
>triangle with indentation
>demon core
>stars with more points
>stars with fewer points
>crecent
>half-circle
>triangle
>rectangle
>circle
most likely to be paired
somthing like that. with the dice it's easiest, always the highest number. if you see a six, you don't have to check the rest. there's also a pattern to the one with the letters and numbers. i havent figured ot out exactly but the highlighted letter closest to the bottom right is almost always the unpaired one. i sometimes encounter exceptions.