jexmand

1st trial - put 6 balls at each side .. take out the lighter 6 balls
1 Y4 t0 I/ m  |6 a- r5 M8 ^1 W公仔箱論壇2nd trial - put the heavier 6 balls by 3 balls at each sidetvb now,tvbnow,bttvb  C: t/ b% F+ c
lastly, take out the lighter 3 balls.... now left 3 balls..
+ \$ e! r( g. X2 p3rd 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...