dustking

i found the ans in 30 mins but dont know correct or not?
0 U# E' _: i% U; c公仔箱論壇ans is too long! but concepts are something like that:tvb now,tvbnow,bttvb" V3 L5 z) z/ O9 D
seprate 4 groups 3 balls in one group! # I) z- a& p# x, Y$ S, Z( ~. c+ F
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!7 t" T5 U( a3 f" j( s' U
the last part is 1ball vs 1ball! something like that