i found the ans in 30 mins but dont know correct or not?
7 u% ?) X4 D$ Z1 ~3 t2 v" `* f5.39.217.77ans is too long! but concepts are something like that:公仔箱論壇6 S! e; T" {* X1 v/ H
seprate 4 groups 3 balls in one group!
5 S8 E& [: V/ N5 ^) ltvb now,tvbnow,bttvbthe important part is the 2nd times which need to find out the fake ball is heavier or lighter by use the normal ball that u find at the first time!5.39.217.774 p/ b0 y1 E$ L% f
the last part is 1ball vs 1ball! something like that |