Reason 1) thing is female brain can do or remember many things but not one thing at the deepest level, Till 10th or 12 th we study many subjects but not perticular thing in deepth, So 99.9% scientist are Men, and 90% PA's(Personal Assistants) for mutipurpose work are women... Reason 2) When things are not needed to study to the Depth, just learning basics...U can easily Byhart them,, girls are gud at byharting without understanding. and reproducing at exams.. boys ususally try to understand the matter and try to experiment even during exams...