first divide it into 3 groups... 4 for each group...
7 k3 J0 N$ S; z, f公仔箱論壇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...- M# y! S9 P, [% e
den... left 4 balls...公仔箱論壇% d* T5 i2 p; z+ m& x+ @. l" Y, s
when u use tat 3 groups to test... u oredi know it is heavier or not...) X/ n* Z, }4 U5 G9 h* C6 n; a
so when testing these 4 balls... u juz nit 2 find out the heavier or lighter 1...5.39.217.76; u" K& |2 |7 P
take the heavier or lighter 1... throw away tat 2 normal ball...tvb now,tvbnow,bttvb. P) ~* _% K, j2 j/ Y* w: t4 n$ U
den u juz nit 2 test the last 2 balls...5.39.217.76; e4 y7 S. K! C _) x# A8 b7 M( |
same for now... take the heavier or lighter 1... |