1. divide 6 and 6, both sides will not equal公仔箱論壇" e: y* Y! Z2 K
2. take any side of the 6, divide then 3 and 3, again both sides will not equaltvb now,tvbnow,bttvb8 ?, [# a/ n" V& T. u
3. take any 2 and weigh themtvb now,tvbnow,bttvb2 O+ F5 b! E, W$ {" ]! K( U# e4 S0 g' c
if they equal, the one left is the ball.