first divide it into 3 groups... 4 for each group...
" K9 X1 Y& p j4 f6 {+ u" }tvb now,tvbnow,bttvbden 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...5.39.217.77:88987 M0 E# N2 _* R6 G
den... left 4 balls...
+ E/ Z. b% r* n k2 jtvb now,tvbnow,bttvbwhen u use tat 3 groups to test... u oredi know it is heavier or not...公仔箱論壇4 H9 @' C7 x, V+ B
so when testing these 4 balls... u juz nit 2 find out the heavier or lighter 1...
! j8 H8 d' K0 M- f5.39.217.77:8898take the heavier or lighter 1... throw away tat 2 normal ball...% y2 F: q3 |; Q, {) G5 {8 `
den u juz nit 2 test the last 2 balls...
( Y! V2 l1 f" H5.39.217.77:8898same for now... take the heavier or lighter 1... |