first divide it into 3 groups... 4 for each group...
3 d/ w7 [' L# W# I% I; L) p- P. ^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。den use 2 groups to test... if the weight is same... den throw away these 2 groups.. if not... use another 1 group to test with tat 2 groups... throw away the same weight groups...
' B& W" Q% W1 z+ S* ]; K8 K1 w5.39.217.77:8898den... left 4 balls...
* V! {/ R2 M: i" w- Dtvb now,tvbnow,bttvbwhen u use tat 3 groups to test... u oredi know it is heavier or not...9 q5 o4 U' b( R+ b; x: \" u
so when testing these 4 balls... u juz nit 2 find out the heavier or lighter 1...5.39.217.77:8898) p8 Z5 z* Y! P* z
take the heavier or lighter 1... throw away tat 2 normal ball...tvb now,tvbnow,bttvb, E) p* \- F6 C( z/ L
den u juz nit 2 test the last 2 balls...
( X: _$ y [7 x0 z9 Csame for now... take the heavier or lighter 1... |