1. divide 6 and 6, both sides will not equal5.39.217.76: Q3 b* Y1 m) ?0 @: \: y7 M4 E% U
2. take any side of the 6, divide then 3 and 3, again both sides will not equal - z( Z ~: [3 m6 K9 H6 J7 Z2 P3 h公仔箱論壇3. take any 2 and weigh them) U% U) r# Z3 n. k: x' k" ]
if they equal, the one left is the ball.