1. divide 6 and 6, both sides will not equal公仔箱論壇" E2 k8 c' u" F; g
2. take any side of the 6, divide then 3 and 3, again both sides will not equal " b1 ], f1 U, Z. K3. take any 2 and weigh them# V* p2 ]9 t( _/ H5 G
if they equal, the one left is the ball.