gensy850711

first divide it into 3 groups... 4 for each group...tvb now,tvbnow,bttvb+ B# D& p7 o( d4 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...- U9 }/ x8 I' T, G1 {* m
den... left 4 balls...- |  e# `- [. ]
when u use tat 3 groups to test... u oredi know it is heavier or not...
/ J% [- e* T9 O6 I& Y$ c5.39.217.77:8898so when testing these 4 balls... u juz nit 2 find out the heavier or lighter 1...$ R2 K$ Z) T# d0 l8 _* J
take the heavier or lighter 1... throw away tat 2 normal ball...9 ^0 Q% ]: o& J1 G0 e1 D' {
den u juz nit 2 test the last 2 balls...
0 A$ l( q5 c7 L& `5.39.217.77:8898same for now... take the heavier or lighter 1...