1. divide 6 and 6, both sides will not equaltvb now,tvbnow,bttvb+ B: n, ~. ?- a4 y1 u
2. take any side of the 6, divide then 3 and 3, again both sides will not equal * N+ R+ H/ c6 C; H" P) x公仔箱論壇3. take any 2 and weigh them9 z0 h2 N8 S$ f- B
if they equal, the one left is the ball.