1st trial - put 6 balls at each side .. take out the lighter 6 balls j$ \3 o' L* F0 j
2nd trial - put the heavier 6 balls by 3 balls at each side公仔箱論壇2 d) a" N; @/ K; ?& Y% ]& e. m
lastly, take out the lighter 3 balls.... now left 3 balls..
0 Q' U, a9 P9 G. W2 j/ k( ~5.39.217.763rd 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... |