first, compare 6 and another 6. they must have difference. / \% l: B; r6 i# u' Q
second, divide those 6 heavier one into two, each has 3. u will find difference again.公仔箱論壇3 @9 P2 d( r. s1 a
third time, if u put 2 and they are equal, u will know the different one.tvb now,tvbnow,bttvb+ u/ \5 t3 h; W0 d/ w
so easy.... |