divide it into pile and wait , then use the heavy side and divided into two pile and weight, and take out the heavy side which remain3 then take any two to weifht ,if both side even then the odd one is hte different one ,and if one side is heavier than the other ,then you know the answer.
first divide it into 3 groups... 4 for each group...公仔箱論壇# [1 I1 ?- s8 m. O X( Z
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... 7 z: e) M. I& N4 X, F; Z' f' Sden... left 4 balls... ' m/ Y) P, q2 x4 k4 Bwhen u use tat 3 groups to test... u oredi know it is heavier or not... 6 ?- M: S( C1 `0 sso when testing these 4 balls... u juz nit 2 find out the heavier or lighter 1...os.tvboxnow.com, V U6 D# b; }8 O3 }# P
take the heavier or lighter 1... throw away tat 2 normal ball..." U8 Z. t; ^% w; F. B Q& l- b
den u juz nit 2 test the last 2 balls... . Z3 o9 x6 B _4 x0 i' l3 `same for now... take the heavier or lighter 1...