first divide it into 3 groups... 4 for each group...4 ^' q5 s9 V# `0 o: @# Z5 T0 k
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...
% ?* w1 B: w8 k; P( m Bden... left 4 balls...& L" \* M* l, L
when u use tat 3 groups to test... u oredi know it is heavier or not...% ]& f3 N+ e8 g, y, x1 P; j
so when testing these 4 balls... u juz nit 2 find out the heavier or lighter 1.... b$ }) \, x" S, h
take the heavier or lighter 1... throw away tat 2 normal ball...
+ D6 I3 Z6 F4 R% i8 F3 S4 }tvb now,tvbnow,bttvbden u juz nit 2 test the last 2 balls...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。; @. n4 W3 E: x' y* j: |7 O
same for now... take the heavier or lighter 1... |