1. divide 6 and 6, both sides will not equal : ]6 |1 B7 O H( u Ctvb now,tvbnow,bttvb2. take any side of the 6, divide then 3 and 3, again both sides will not equaltvb now,tvbnow,bttvb" A7 g; Z# O ?6 f0 F+ d5 z4 L
3. take any 2 and weigh them公仔箱論壇4 n+ A4 T% r: i1 n9 | I H
if they equal, the one left is the ball.