first divide it into 3 groups... 4 for each group...
; A2 U% N2 r! Y& }- xtvb now,tvbnow,bttvbden 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 P( [7 a, E0 G: G, f. Y5 L/ w- f% cden... left 4 balls...tvb now,tvbnow,bttvb0 }) }6 J# S( L* z- K
when u use tat 3 groups to test... u oredi know it is heavier or not...
' j0 z, \7 X$ O* a$ N+ q- d) }so when testing these 4 balls... u juz nit 2 find out the heavier or lighter 1...
- _, \" K1 v! K4 P( H1 [TVBNOW 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。take the heavier or lighter 1... throw away tat 2 normal ball...5.39.217.76" {# d7 J( ]! {- g* r, U; `/ w
den u juz nit 2 test the last 2 balls...tvb now,tvbnow,bttvb. |( h" d @ @
same for now... take the heavier or lighter 1... |