i found the ans in 30 mins but dont know correct or not?
3 v, k p* d k! K5 w5 Y" ztvb now,tvbnow,bttvbans is too long! but concepts are something like that:公仔箱論壇9 l4 Q8 p# _3 G3 y! D4 F
seprate 4 groups 3 balls in one group!
2 k( _. R/ e3 M3 q: P) s% d5.39.217.76the 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!) `8 l p0 e1 g `$ L4 ?
the last part is 1ball vs 1ball! something like that |