1. divide 6 and 6, both sides will not equal公仔箱論壇+ o! \. ]; @, U) S: O
2. take any side of the 6, divide then 3 and 3, again both sides will not equal & t! g: O% N4 ?" i. s: k3. take any 2 and weigh them ) x \4 w7 @7 F3 `% }. d4 X2 y公仔箱論壇if they equal, the one left is the ball.