jexmand

1st trial - put 6 balls at each side .. take out the lighter 6 balls
; [; X# Z" s+ MTVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。2nd trial - put the heavier 6 balls by 3 balls at each side
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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...