1st trial - put 6 balls at each side .. take out the lighter 6 balls
$ H6 F4 \- E- I% @; @ K9 i5.39.217.762nd trial - put the heavier 6 balls by 3 balls at each side
! m2 E5 G v5 }, r6 Llastly, take out the lighter 3 balls.... now left 3 balls..公仔箱論壇# Z5 B9 y. P5 y* Y' I8 l, K; l
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... |