first, compare 6 and another 6. they must have difference. 4 y7 G) u# a- a/ R" `( y% n# i
second, divide those 6 heavier one into two, each has 3. u will find difference again.5.39.217.77. g3 H; W5 F' K. T& w B
third time, if u put 2 and they are equal, u will know the different one.
7 I" Z, i6 p K5 {+ Wtvb now,tvbnow,bttvbso easy.... |