first, compare 6 and another 6. they must have difference. ! |- c5 {- C' R/ a7 _$ X/ \, p
second, divide those 6 heavier one into two, each has 3. u will find difference again.
8 H6 U) ?' c3 b. S: E' V& K- ?4 N公仔箱論壇third time, if u put 2 and they are equal, u will know the different one.5.39.217.77:88989 Z& ~4 L. _+ E0 w5 d' Q
so easy.... |