this is too easy!!
0 s! r) V! j& F: B: _' P1 z
/ r& A+ M3 T( |% S' H" `www3.tvboxnow.com1. put 6 at each side.. take the one side which is heavier
$ g% g9 u" F8 P8 J. Z( b公仔箱論壇2. put 3 at each side.. also take the heavier side
: M6 |0 v2 b5 K3 L0 F3. put 1 at each side.. if the weight balance then the one not put inside is the heavy ball.. else the side which is heavier is the heavier ball.. |