dustking

i found the ans in 30 mins but dont know correct or not?5.39.217.76! r) o& n! Y" p
ans is too long! but concepts are something like that:公仔箱論壇, s( S: g, E7 K
seprate 4 groups 3 balls in one group! 公仔箱論壇% n+ K  F1 Q/ W& _. {* W) c
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!
5 }/ _& ]- a. i- i) hthe last part is 1ball vs 1ball! something like that