i found the ans in 30 mins but dont know correct or not?tvb now,tvbnow,bttvb0 g$ \0 \ a& o& n7 P" P) M8 L% H
ans is too long! but concepts are something like that:6 s. }# p i+ _' T) S) Q [
seprate 4 groups 3 balls in one group!
8 B' y0 q3 i3 K. L, g7 l7 a2 P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!
- N/ |( B: v/ N" s7 X$ C3 ^the last part is 1ball vs 1ball! something like that |