1. divide 6 and 6, both sides will not equal公仔箱論壇+ a* b/ H |; e, n9 B- ^. L
2. take any side of the 6, divide then 3 and 3, again both sides will not equal " S4 k4 E* `7 P' R5 V; x5 T4 ptvb now,tvbnow,bttvb3. take any 2 and weigh themtvb now,tvbnow,bttvb1 D6 _1 t7 k2 R% b
if they equal, the one left is the ball.