first, compare 6 and another 6. they must have difference. 5.39.217.76( b4 \& |7 N) p; r
second, divide those 6 heavier one into two, each has 3. u will find difference again.
4 G. W$ c! h5 v% {) ~third time, if u put 2 and they are equal, u will know the different one.
9 E7 T- |/ Z7 `5 T& V( g* V( W( m" sso easy.... |