1.) 9.. each brother (6) has one sister (1).. not each brother has 6 sisters.. plus the (2) two parents.
2.) the 'triangles' are not triangles. their potrayed hypotenues' differ in shape, i.e., they are not perfectly straight lines. the areas are the same, though.. because each shape holds the same area, no matter how they are rearranged.
3.) one two three four five
six seven eight nine ten
