first, compare 6 and another 6. they must have difference. 3 r9 H. h3 f0 }0 \$ E/ w4 z
second, divide those 6 heavier one into two, each has 3. u will find difference again.
) G- ]. A2 v- {% ]third time, if u put 2 and they are equal, u will know the different one.公仔箱論壇% O3 j* F6 ~* P/ k! H) [ A
so easy.... |