i found the ans in 30 mins but dont know correct or not?tvb now,tvbnow,bttvb; T" P0 @2 z( \" |. V6 a- W
ans is too long! but concepts are something like that:
+ I K, A; g v5 A. n9 mseprate 4 groups 3 balls in one group!
) k5 y" o; y$ {2 H6 |6 y" {% ^! A) Q公仔箱論壇the 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!
& Q3 L: X5 [% x5 F. D( o$ Ltvb now,tvbnow,bttvbthe last part is 1ball vs 1ball! something like that |