i found the ans in 30 mins but dont know correct or not?
' |# F5 ?5 S+ X( itvb now,tvbnow,bttvbans is too long! but concepts are something like that:公仔箱論壇9 K) J, ^) r x5 \7 O
seprate 4 groups 3 balls in one group! 公仔箱論壇- t& {# L; t. k; K! X
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!
( p6 ^* H( [1 }* u2 P7 ytvboxnow.comthe last part is 1ball vs 1ball! something like that |