first divide it into 3 groups... 4 for each group...
" r5 Q7 @! R7 ^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,bttvb3 U/ s' n p8 B+ ^* M
den... left 4 balls...5.39.217.76: J+ H, v" \$ ]+ ^# ?& m
when u use tat 3 groups to test... u oredi know it is heavier or not...
6 w$ w7 p: w. b/ s! S" |9 H9 B2 ]7 h: e5.39.217.76so when testing these 4 balls... u juz nit 2 find out the heavier or lighter 1...* |+ t$ `. ?, q8 ~" F/ e
take the heavier or lighter 1... throw away tat 2 normal ball...: Z) s% {* Y' E. s0 }( k9 J; R
den u juz nit 2 test the last 2 balls...5.39.217.763 Q" Y/ [" L4 ?, S2 E
same for now... take the heavier or lighter 1... |