first divide it into 3 groups... 4 for each group...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。$ |# _- I: t+ D: g# v- |4 i" A
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...tvb now,tvbnow,bttvb; M4 U; H. Q$ P/ M9 i9 `) O) T
den... left 4 balls...公仔箱論壇, T- w9 Y- u0 e5 _, F
when u use tat 3 groups to test... u oredi know it is heavier or not...
9 E" X5 D/ }9 ?9 E4 zso when testing these 4 balls... u juz nit 2 find out the heavier or lighter 1...
# p2 i% c3 e5 f5.39.217.76take the heavier or lighter 1... throw away tat 2 normal ball...公仔箱論壇& J# n7 x, m/ a0 t5 P6 F
den u juz nit 2 test the last 2 balls...
5 e6 ^" s+ i9 Xsame for now... take the heavier or lighter 1... |