i found the ans in 30 mins but dont know correct or not?. l& h. X q" Y
ans is too long! but concepts are something like that:
( Y1 X1 w! v9 w, fseprate 4 groups 3 balls in one group! tvb now,tvbnow,bttvb V$ e) l) L* O2 r! ^- C1 l
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!
Y' ^" x* b" @# Q$ W' u. k/ t' Y" r5.39.217.77:8898the last part is 1ball vs 1ball! something like that |