divde the 12 balls into 3 sets of 4. 5.39.217.77:8898: r8 Q& ~8 W U. J
weight any 2 sets.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。% P1 ~" y! }$ n8 \
if the 2 sets are equal, then you know the heavy one is in the third公仔箱論壇* Z# ~. \8 X0 o" B4 d; w
if 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。; S/ H2 k& R0 } s
then divide the 4 balls into 2.
" f# }1 |) Q( Fweigh them
! L h! U8 m' s7 aand divide the heavier into 1
% r+ O+ }1 g' s7 n2 |, \9 v s0 X5.39.217.77:8898and weight them.5 L2 x4 L: r4 J) J- m4 {9 d
3 x weighing and get the ans. tvb now,tvbnow,bttvb7 t$ F' C; w: _. `2 g3 f. n# I
in less than 15 secs. |