first, compare 6 and another 6. they must have difference. 公仔箱論壇: P7 E* N( ?' y" ]$ T8 G
second, divide those 6 heavier one into two, each has 3. u will find difference again.tvb now,tvbnow,bttvb5 b7 l% Z$ ^( T( H% ^$ [, R z3 r$ y
third time, if u put 2 and they are equal, u will know the different one.5.39.217.765 ]8 ]3 d U" b8 s$ l: K) K* S) r
so easy.... |