first divide it into 3 groups... 4 for each group...
% c/ d6 d2 b9 f% s* I5 a }$ Rtvb 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...
7 I! o7 z3 [- F) }# ktvb now,tvbnow,bttvbden... left 4 balls...
. u& x, X* K1 U2 [0 [when u use tat 3 groups to test... u oredi know it is heavier or not...tvb now,tvbnow,bttvb# A1 a9 I5 D* w4 }4 s# ]1 ^* o
so when testing these 4 balls... u juz nit 2 find out the heavier or lighter 1...
& X7 k4 a: g Mtake the heavier or lighter 1... throw away tat 2 normal ball...1 u M" V P1 l/ ~* K2 l
den u juz nit 2 test the last 2 balls...
+ {0 F% b3 a$ O, Swww3.tvboxnow.comsame for now... take the heavier or lighter 1... |