first divide it into 3 groups... 4 for each group...
# u- S7 @# C$ p( h( hden 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 \5 j( B* x% k2 P& i& hos.tvboxnow.comden... left 4 balls...tvb now,tvbnow,bttvb6 n3 u5 X( |. U( F( E" X" i5 L
when u use tat 3 groups to test... u oredi know it is heavier or not...! }& M' Q! z- z. n! ?2 }
so when testing these 4 balls... u juz nit 2 find out the heavier or lighter 1...; e7 A" ?/ F) t' Z1 O
take the heavier or lighter 1... throw away tat 2 normal ball...tvb now,tvbnow,bttvb, [2 `' z8 P! B; e
den u juz nit 2 test the last 2 balls...
( B' L# @& ?2 n; `4 M( \7 m公仔箱論壇same for now... take the heavier or lighter 1... |