divde the 12 balls into 3 sets of 4.
! R2 D' H+ @9 A/ b& h D/ 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.
' {6 B. y2 @3 m) r! Aif the 2 sets are equal, then you know the heavy one is in the third: E1 u4 @, g$ o7 |( y
if one of the 2 is heavier, then the heavy one is in that set
! l7 a; J0 P% d, E5.39.217.76then divide the 4 balls into 2.
' G0 f8 Q* l. h% h. Eweigh them
" B5 n% C7 Q$ Sand divide the heavier into 1tvb now,tvbnow,bttvb' o6 g0 w" D% m6 e& e3 ^% B6 \
and 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。 y; |6 d) n# r1 P
3 x weighing and get the ans.
1 [& S8 f' i) \+ c( kin less than 15 secs. |