first divide it into 3 groups... 4 for each group...公仔箱論壇' x5 x* Z4 K! y0 ]5 b, u) [
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...
4 B8 p* H* |) k$ N+ _* Ztvb now,tvbnow,bttvbden... left 4 balls...
9 i0 c) G7 c/ F2 ]9 g* twww2.tvboxnow.comwhen u use tat 3 groups to test... u oredi know it is heavier or not..." L7 V/ J# W/ {+ ]# `* @
so when testing these 4 balls... u juz nit 2 find out the heavier or lighter 1...
; \# o. M. h( [: |0 i; Ctvb now,tvbnow,bttvbtake the heavier or lighter 1... throw away tat 2 normal ball...
* x+ b4 E; d2 c; Cden u juz nit 2 test the last 2 balls...
# d# @) T, B6 K; Q/ D) `www2.tvboxnow.comsame for now... take the heavier or lighter 1... |