first divide it into 3 groups... 4 for each group...
: h+ w( H. R# Z& k' X: J: NTVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。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...
% a9 t `8 m4 e公仔箱論壇den... left 4 balls...
% p6 s+ ?' y" mtvb now,tvbnow,bttvbwhen u use tat 3 groups to test... u oredi know it is heavier or not...5.39.217.77. F8 `& K4 Y/ L" \
so when testing these 4 balls... u juz nit 2 find out the heavier or lighter 1...
, C' F8 w6 Y+ O. b5.39.217.77take the heavier or lighter 1... throw away tat 2 normal ball...5.39.217.77' N7 W0 w, a# P/ P0 M8 B$ L% O7 \
den u juz nit 2 test the last 2 balls...tvb now,tvbnow,bttvb9 F7 b+ D6 v/ D. p. Y z: O- L% k0 H
same for now... take the heavier or lighter 1... |