divde the 12 balls into 3 sets of 4.
% @8 w1 K" U) C( u/ lTVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。weight any 2 sets.* l+ w! n. U! f( l
if the 2 sets are equal, then you know the heavy one is in the third
# q! v, q1 y! [7 ~, z" d' C2 ^tvb now,tvbnow,bttvbif one of the 2 is heavier, then the heavy one is in that setTVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。' `6 w, k' \: K' k
then divide the 4 balls into 2.
" U9 A# }" i! [, t" I0 i1 |公仔箱論壇weigh them
" R. X ^3 \1 N0 i6 ptvb now,tvbnow,bttvband divide the heavier into 1
! @6 P& T5 n& ?3 S. u' Wand weight them.TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。( [% h1 g0 r T$ b; e
3 x weighing and get the ans. tvb now,tvbnow,bttvb4 }; O0 ^9 c+ O0 [" \
in less than 15 secs. |