1. divide 6 and 6, both sides will not equal* q4 k2 ^) w3 e4 M6 q
2. take any side of the 6, divide then 3 and 3, again both sides will not equal公仔箱論壇# @- _* |% F. t1 X$ v
3. take any 2 and weigh them " h+ P! u/ y- D% Mif they equal, the one left is the ball.