divde the 12 balls into 3 sets of 4.
" l) ]$ `( d: n& ]* I1 D公仔箱論壇weight any 2 sets.公仔箱論壇- A! H0 M8 v {1 A/ q/ b" l* J
if the 2 sets are equal, then you know the heavy one is in the third
; t8 |. E! t! i, C. UTVBNOW 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。if one of the 2 is heavier, then the heavy one is in that set( _7 Y' M" l. a$ e6 ?+ O& G
then divide the 4 balls into 2.公仔箱論壇& Y) k. Q; H& A P0 [, _! m; s2 u& ~
weigh them
5 E6 @, H0 p3 O3 o1 q6 R6 Z3 c5.39.217.76and divide the heavier into 1tvb now,tvbnow,bttvb( b- J" z8 E! u/ h! L: O
and weight them.
% U' A. m) j) M5 i: r' ]* Z3 x weighing and get the ans. % E; F( E2 r d
in less than 15 secs. |