1st trial - put 6 balls at each side .. take out the lighter 6 balls
% _- L3 c+ x$ J6 M- c$ U2nd trial - put the heavier 6 balls by 3 balls at each sidetvb now,tvbnow,bttvb+ j) ~5 y( A" c* D6 X
lastly, take out the lighter 3 balls.... now left 3 balls..
8 t a; ~& W! t$ i公仔箱論壇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... |