i found the ans in 30 mins but dont know correct or not?os.tvboxnow.com O) j/ R& i" X; B& a+ G; x' u
ans is too long! but concepts are something like that:tvb now,tvbnow,bttvb+ C# d1 Q7 o6 o
seprate 4 groups 3 balls in one group! tvb now,tvbnow,bttvb/ ^1 v0 m( q% j) X3 c4 Z0 l) ?+ G
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!公仔箱論壇5 \8 D/ k: `; A
the last part is 1ball vs 1ball! something like that |