Bongard Problems

[Demon]

(03-14-2014 01:12 PM)TheGreatErenan Wrote:  The only thing I can think of, though I really doubt this is the correct solution, is that if you treat them as hexadecimal numbers and convert to binary, then the number of 1's is divisible by 3 in Group A but not in Group B.

I'm just going to assume that's true, since I don't feel like testing that at 11:30 at night, but even so, there's a much simpler answer.