jexmand

1st trial - put 6 balls at each side .. take out the lighter 6 balls公仔箱論壇! h9 B  h% G' _* o+ S$ r+ @; D, [
2nd trial - put the heavier 6 balls by 3 balls at each side
. f  a0 m$ i) Ntvb now,tvbnow,bttvblastly, take out the lighter 3 balls.... now left 3 balls..
4 m4 y) y  h* r; t: j$ A2 N3rd 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...