1. divide 6 and 6, both sides will not equal 9 a; E+ u9 W+ _8 `5 L/ U: h, T3 T; d公仔箱論壇2. take any side of the 6, divide then 3 and 3, again both sides will not equal # ~9 y' V4 ?4 C7 Q3. take any 2 and weigh them5 ?) Y$ H4 u; r+ L. g7 a" s! H
if they equal, the one left is the ball.