1st trial - put 6 balls at each side .. take out the lighter 6 balls
0 ^# \3 T! m, _' V, P8 s5.39.217.762nd trial - put the heavier 6 balls by 3 balls at each side
7 @4 D, B! V$ \" {$ o2 hlastly, take out the lighter 3 balls.... now left 3 balls..公仔箱論壇* \" g' h$ E6 r: W) {- e1 M
3rd trial - put 1 ball on each side, left 1 ball on table. if both sides balance, the ball on table is the heaviest. if one side on the scale is heavier then it is the heaviest... |