first divide it into 3 groups... 4 for each group...tvb now,tvbnow,bttvb# O1 \8 e% Y0 a- u, l T2 ^
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...www3.tvboxnow.com0 X/ z4 P0 M4 `- ^( ?+ p
den... left 4 balls...
& B( v' }/ W7 t, x4 o- awhen u use tat 3 groups to test... u oredi know it is heavier or not...公仔箱論壇" B/ Q/ a2 G* a3 ^
so when testing these 4 balls... u juz nit 2 find out the heavier or lighter 1...
8 d! P4 d5 S* C3 C' y, X- a. v+ l公仔箱論壇take the heavier or lighter 1... throw away tat 2 normal ball...
4 @; {8 v( z, V6 S1 C1 g, ?. }tvb now,tvbnow,bttvbden u juz nit 2 test the last 2 balls...% p) E1 J$ K* e) F4 v$ r; R2 m
same for now... take the heavier or lighter 1... |