i found the ans in 30 mins but dont know correct or not?tvb now,tvbnow,bttvb7 L% L2 v! ?1 ^$ j* v# D
ans is too long! but concepts are something like that:5.39.217.77* J! \! v% Q) }: u, ]. p, R
seprate 4 groups 3 balls in one group!
; j9 ]- y% p, j4 u. C1 T# d: D3 a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!公仔箱論壇. q: A9 F5 l+ |4 d5 E
the last part is 1ball vs 1ball! something like that |