1. divide 6 and 6, both sides will not equal 4 s. i* x% d5 t! [0 l; H5 @* etvb now,tvbnow,bttvb2. take any side of the 6, divide then 3 and 3, again both sides will not equal " i& ]# l! W( N3 p公仔箱論壇3. take any 2 and weigh them 0 Y( b/ a2 {2 O# U- S: B# [! c: `) B公仔箱論壇if they equal, the one left is the ball.