first, compare 6 and another 6. they must have difference.
$ V4 B/ e% O% j% q$ c$ T, t7 Jsecond, divide those 6 heavier one into two, each has 3. u will find difference again.公仔箱論壇( i& p- B- o' [$ Q# \& `. d
third time, if u put 2 and they are equal, u will know the different one.# z! ^. Z0 e3 ~! ^9 T% K
so easy.... |