gensy850711

first divide it into 3 groups... 4 for each group...
* ~! J- b& ^: m0 x5 \5.39.217.76den 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.../ t0 T1 g) J8 q' w6 ?  J
den... left 4 balls...
- {+ |; K  @  }( s7 iTVBNOW 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。when u use tat 3 groups to test... u oredi know it is heavier or not...tvb now,tvbnow,bttvb6 K# B* F! j/ z- o1 y; y8 ~, C% I
so when testing these 4 balls... u juz nit 2 find out the heavier or lighter 1...
# \3 v2 ]4 g1 Jtake the heavier or lighter 1... throw away tat 2 normal ball...
8 D/ h8 }& f$ bden u juz nit 2 test the last 2 balls...tvb now,tvbnow,bttvb) ]+ c/ l0 A, Y: o
same for now... take the heavier or lighter 1...