first, compare 6 and another 6. they must have difference. 公仔箱論壇/ A; G+ Y- _+ K0 |9 U; a
second, divide those 6 heavier one into two, each has 3. u will find difference again.
" r$ L% N0 Z1 m8 O0 D) ^tvb now,tvbnow,bttvbthird time, if u put 2 and they are equal, u will know the different one./ P# ]; ?* X" a! ^/ D1 b1 w2 A
so easy.... |