1. divide 6 and 6, both sides will not equal公仔箱論壇0 Y* K& Y! M1 y
2. take any side of the 6, divide then 3 and 3, again both sides will not equal . ]) w& o- u1 B# K( H# _公仔箱論壇3. take any 2 and weigh them $ X$ I7 ~, t. e2 d9 }! `公仔箱論壇if they equal, the one left is the ball.