1st trial - put 6 balls at each side .. take out the lighter 6 balls
: [' @# u* T1 W3 V6 Ztvb now,tvbnow,bttvb2nd trial - put the heavier 6 balls by 3 balls at each side
5 r# j p4 }" n; D% ]公仔箱論壇lastly, take out the lighter 3 balls.... now left 3 balls..3 x: \, {+ m3 o3 z7 o
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... |