put 3 balls on each side,
* h; c: Q6 ]9 y! w8 u/ rif balance, we can prove that all 6 balls on the 天平 is normal,
0 o& Y) G9 N! l5 V+ `# @6 c F3 Mos.tvboxnow.comif not balance, we can prove that the 6 balls outside the 天平 is normal.公仔箱論壇. F+ V1 r6 U8 K& n" o% ^: K v
then use the proved-normal ball on one side and put the other ball on other side
1 U' _5 l; {# K# I; ?& w. n公仔箱論壇to determine the abnormal is heavy and light |