1. divide 6 and 6, both sides will not equal公仔箱論壇1 R, p* w, B4 T: _' h
2. take any side of the 6, divide then 3 and 3, again both sides will not equal) x: J7 A! {# d4 d' h z! D: p+ `
3. take any 2 and weigh them5.39.217.771 ?. }! m: f: p# u
if they equal, the one left is the ball.