first, compare 6 and another 6. they must have difference.
' s; Q0 P9 y) ~, Otvb now,tvbnow,bttvbsecond, divide those 6 heavier one into two, each has 3. u will find difference again.
7 _3 N, c o" V1 R* q7 B2 x8 Dtvb now,tvbnow,bttvbthird time, if u put 2 and they are equal, u will know the different one.公仔箱論壇* g% u, O: h/ l) Q( c
so easy.... |