first, compare 6 and another 6. they must have difference. ' {. T. K7 j' k; b
second, divide those 6 heavier one into two, each has 3. u will find difference again.
- S2 ^0 r1 _: s& ctvb now,tvbnow,bttvbthird time, if u put 2 and they are equal, u will know the different one.tvb now,tvbnow,bttvb8 V/ J( J: [: i% i! F
so easy.... |