1. divide 6 and 6, both sides will not equal1 U: O- B1 A& X
2. take any side of the 6, divide then 3 and 3, again both sides will not equal4 F6 X/ `" z* Y- X) r3 m; i
3. take any 2 and weigh them ( G; I/ p5 g; }& `! v8 ]# U8 J公仔箱論壇if they equal, the one left is the ball.