first, compare 6 and another 6. they must have difference. 公仔箱論壇+ o( s" k+ H* d" V" @
second, divide those 6 heavier one into two, each has 3. u will find difference again.
, x* s2 U; U0 h2 @5.39.217.77third time, if u put 2 and they are equal, u will know the different one.1 {2 p* k! W2 f& k% a
so easy.... |