1st trial - put 6 balls at each side .. take out the lighter 6 balls公仔箱論壇/ O! h, p6 ?' w' y" }" m j4 i; J# C
2nd trial - put the heavier 6 balls by 3 balls at each side5.39.217.76+ K8 }) s3 I i# _- v9 e) m
lastly, take out the lighter 3 balls.... now left 3 balls..
' T H* U4 e. h3rd 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... |