1. divide 6 and 6, both sides will not equal / C" Q% q2 c3 Q# v7 K公仔箱論壇2. take any side of the 6, divide then 3 and 3, again both sides will not equal 1 d, |# N! W# @' E% Z& ktvb now,tvbnow,bttvb3. take any 2 and weigh them 0 _; h1 {+ U! C) u5 l) r' O" u" N# H# r公仔箱論壇if they equal, the one left is the ball.