1st trial - put 6 balls at each side .. take out the lighter 6 balls
2 d, n1 G& Y6 Y* o# |tvb now,tvbnow,bttvb2nd trial - put the heavier 6 balls by 3 balls at each side公仔箱論壇7 ^% ]' A e8 o1 i2 u
lastly, take out the lighter 3 balls.... now left 3 balls..tvb now,tvbnow,bttvb; h: P" N0 S9 e+ ~
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... |