first divide it into 3 groups... 4 for each group...tvb now,tvbnow,bttvb0 `: c3 T! U. v+ m
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...tvb now,tvbnow,bttvb. `+ d* t! X' r5 L8 u
den... left 4 balls...
9 z0 x3 k+ l5 n0 }+ Vwhen u use tat 3 groups to test... u oredi know it is heavier or not...
' w& \1 }; U; r9 N2 Htvb now,tvbnow,bttvbso when testing these 4 balls... u juz nit 2 find out the heavier or lighter 1...5.39.217.77:8898 x& D- `2 L I$ P( f) T) D& E! c) I& ]! I
take the heavier or lighter 1... throw away tat 2 normal ball...' _6 D! a# y: S8 A& d" a
den u juz nit 2 test the last 2 balls...5.39.217.77:8898" s- V$ ]' K, z+ E! w
same for now... take the heavier or lighter 1... |