first, compare 6 and another 6. they must have difference.
& m' X& F& `( K. p# ksecond, divide those 6 heavier one into two, each has 3. u will find difference again.5.39.217.76* q8 f2 b; d/ Y8 d# C9 d# G
third time, if u put 2 and they are equal, u will know the different one.
2 }5 O% q, |1 g4 Y, n$ ^/ @' e公仔箱論壇so easy.... |