gensy850711

first divide it into 3 groups... 4 for each group...
+ H& W/ Z. B: P( ~3 [. e1 \2 @5.39.217.77den 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! o2 S! U3 v7 W5 d
den... left 4 balls...
( P5 Z) z) z7 Rwhen u use tat 3 groups to test... u oredi know it is heavier or not..." N7 [' [; x" F* C6 P$ a
so when testing these 4 balls... u juz nit 2 find out the heavier or lighter 1...
- d6 U5 F0 V* P' l* M* ktake the heavier or lighter 1... throw away tat 2 normal ball...' P2 O& }( S/ j5 ^; p* S- u
den u juz nit 2 test the last 2 balls...
5 r/ [' X$ J5 `) ?same for now... take the heavier or lighter 1...