There is 12 balls.. divide them into piles of 41 T/ e6 O5 n, Y! q/ e( J) ~
so 3 groups for 4..name is A,B,C
* S7 n2 c* \1 s; [0 \$ @tvb now,tvbnow,bttvbcase 1: : B. O6 N5 [; a" ~5 q6 ~
measure A -- B 8 S3 A+ f+ } `8 C# q/ b. W0 W
A or B is heavier tvb now,tvbnow,bttvb8 u* A1 h2 h; U" j' W! P# Y
divide that group into 2 by 2' m# z% @0 [; R' l. Y+ z. j
then divide heavier group into 1 by 1- m. f6 ~5 p+ {, o) e6 M$ K
; f. Q1 y3 R+ U% p2 t" t8 `9 K
case 2:
& O. H' r" p# e' ^0 @& r公仔箱論壇A and B is the same.. therefore C has the heavier ball公仔箱論壇* h* I1 V& b& H5 X0 U: U7 h% C
divide C into 2 by 2
7 d$ v# ^" ^% n. l) e2 ]1 Ktvb now,tvbnow,bttvbthen divide heavier group into 1 by 1... q9 h l* M4 K1 T: }" ]) n1 l
. M- u/ N& s; P公仔箱論壇got it in 30 seconds.. not so hard -.-' |