1st trial - put 6 balls at each side .. take out the lighter 6 balls公仔箱論壇$ t+ [" {, H0 h. l0 R& U# g. }. E
2nd trial - put the heavier 6 balls by 3 balls at each side& f: T# J; r+ h! c6 B- }9 ?4 p% d
lastly, take out the lighter 3 balls.... now left 3 balls..
6 f' c9 c% R6 h f, K5.39.217.77:88983rd 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... |