gensy850711

first divide it into 3 groups... 4 for each group...
+ g$ h; W2 R& R9 G3 |9 n+ sTVBNOW 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..." ]+ H: Y) h; |- E4 U, G4 h  Z& v2 V. E
den... left 4 balls...
+ ~+ h. Q" U7 V* x( s公仔箱論壇when u use tat 3 groups to test... u oredi know it is heavier or not...
- O' V% g* a8 D4 p# Q1 I5.39.217.76so when testing these 4 balls... u juz nit 2 find out the heavier or lighter 1...: S3 \, r) n% H/ T4 o3 x; i
take the heavier or lighter 1... throw away tat 2 normal ball...公仔箱論壇3 ?1 P3 R6 f5 n' b
den u juz nit 2 test the last 2 balls...
  |0 S4 q/ ^1 G9 ^* ]same for now... take the heavier or lighter 1...