first divide it into 3 groups... 4 for each group...
) S8 g2 P( {, E( P5 Y; @# v% Ctvb now,tvbnow,bttvbden 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...
, u+ y0 B4 f# W( v% G0 d, [" Uden... left 4 balls...
# d' [8 F; u3 j! R' fwhen u use tat 3 groups to test... u oredi know it is heavier or not...
# q) g I% X9 D! Bos.tvboxnow.comso when testing these 4 balls... u juz nit 2 find out the heavier or lighter 1...
& i/ q% Y! ?* c# ]& S公仔箱論壇take the heavier or lighter 1... throw away tat 2 normal ball...
# }& X3 G6 q y$ @$ |tvb now,tvbnow,bttvbden u juz nit 2 test the last 2 balls...
4 ?5 J' n2 O3 M; @6 T1 y公仔箱論壇same for now... take the heavier or lighter 1... |