jexmand

1st trial - put 6 balls at each side .. take out the lighter 6 balls+ U7 |! w! Q* |) D2 i
2nd trial - put the heavier 6 balls by 3 balls at each sideTVBNOW 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。9 q3 ^9 s  c+ b2 k: w
lastly, take out the lighter 3 balls.... now left 3 balls..tvb now,tvbnow,bttvb# Y) i- @, v" q; x
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...