put 3 balls on each side, 公仔箱論壇- J, ^8 h7 I! [* v
if balance, we can prove that all 6 balls on the 天平 is normal, 5.39.217.76; f' R1 r U( Y% s& r; s& z* S6 d* e {
if not balance, we can prove that the 6 balls outside the 天平 is normal.
[1 c6 {. T. n- g2 g9 Htvb now,tvbnow,bttvbthen use the proved-normal ball on one side and put the other ball on other side tvb now,tvbnow,bttvb: F& c" N; `% F$ w; `5 n
to determine the abnormal is heavy and light |