i found the ans in 30 mins but dont know correct or not?5.39.217.77:8898* U7 n# U' i+ w
ans is too long! but concepts are something like that:
s. G+ |% O& D; utvb now,tvbnow,bttvbseprate 4 groups 3 balls in one group!
3 i2 a0 N4 j5 S9 \" \5.39.217.77:8898the 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!
& }/ r, d1 K2 |# I3 o. H9 ^公仔箱論壇the last part is 1ball vs 1ball! something like that |