1. divide 6 and 6, both sides will not equal 2 B5 T3 c, S) r9 d( {* E2. take any side of the 6, divide then 3 and 3, again both sides will not equal公仔箱論壇) J$ D( U6 X! g# `* ~4 t( o
3. take any 2 and weigh them * `* M* }4 o% eif they equal, the one left is the ball.