1. divide 6 and 6, both sides will not equal公仔箱論壇; K: T) M3 _0 X* ]6 Y$ r# k
2. take any side of the 6, divide then 3 and 3, again both sides will not equal* ~& L/ D" X8 M& i, @
3. take any 2 and weigh them & V2 ~0 H8 _3 ?+ `1 @ C; E公仔箱論壇if they equal, the one left is the ball.