first, compare 6 and another 6. they must have difference. 公仔箱論壇2 p5 [& r) U* b& Q( |
second, divide those 6 heavier one into two, each has 3. u will find difference again.公仔箱論壇+ J1 @+ c/ g( J- ~* U
third time, if u put 2 and they are equal, u will know the different one.tvb now,tvbnow,bttvb. e; _0 B) T, ?0 S
so easy.... |