first divide it into 3 groups... 4 for each group...1 B T, S. F6 d& ]7 V
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...
& e/ n. B1 O3 w: P# _den... left 4 balls...
+ m. `3 a4 w9 Z" P6 f公仔箱論壇when u use tat 3 groups to test... u oredi know it is heavier or not...tvb now,tvbnow,bttvb0 u# \$ ^% X$ d0 `2 {# |
so when testing these 4 balls... u juz nit 2 find out the heavier or lighter 1...5.39.217.77* _- I9 n! B% H+ P# Y( K, n
take the heavier or lighter 1... throw away tat 2 normal ball...5.39.217.77! l, _) u% V5 M# q# [
den u juz nit 2 test the last 2 balls...
/ L/ e7 c4 n3 }& _- P6 O- j: q公仔箱論壇same for now... take the heavier or lighter 1... |