first divide it into 3 groups... 4 for each group...5.39.217.77' p, ?. \ }- T. ~) ^9 z
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...
. t' @" g1 k/ x. y公仔箱論壇den... left 4 balls...
. R2 E7 A- r2 l8 }5 Awhen u use tat 3 groups to test... u oredi know it is heavier or not...
2 S1 d/ D# Y5 Y3 m5 S# ]2 `tvb now,tvbnow,bttvbso when testing these 4 balls... u juz nit 2 find out the heavier or lighter 1...
- k/ Q. z# h8 x3 M. m. F; G- otvb now,tvbnow,bttvbtake the heavier or lighter 1... throw away tat 2 normal ball...4 l+ @ d9 H7 O7 U% P! k+ p- j
den u juz nit 2 test the last 2 balls...5.39.217.774 I3 K, u, Y% z: P
same for now... take the heavier or lighter 1... |