dustking

i found the ans in 30 mins but dont know correct or not?" c3 c; E! @( I% F# Y' f# N
ans is too long! but concepts are something like that:
! P' E9 ~- u# r5.39.217.77seprate 4 groups 3 balls in one group! + B, o- e3 F* [- A  e! L8 U/ k
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!
, F: S7 J+ k, I$ |7 H) `0 H5.39.217.77the last part is 1ball vs 1ball! something like that