This problem can be solved by pre-school children in five to ten minutes, by programmers in an hour and by people with higher education... well, check it yourself!
are we counting how many circles are in the numbers? like for the first one there are two circles in each eight and there are two eights so that's four circles then one circle in the zero and one circle in the nine so a total of six circles. if we are than i dont get how 6666=6