Divide 3 groups first.
; r, Z, v" w2 l, v4 u1 `6 ~i.e. 4 x 4 x 4.
% @9 q+ r5 M% v! L& I2 R0 }9 ~tvb now,tvbnow,bttvbWeight any 2 groups [1st]
+ R& V1 R( a5 @9 u; H& Hthen you will know the heavier ball in which group.tvb now,tvbnow,bttvb f8 H2 r: X7 k' O
Weight any 2 balls in that group [2nd]TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。! W- a/ b) ^! l6 X0 y' K
then you will know the heavier ball in which 2 balls.- y9 m' N$ o9 Z" a- I; s
Repeat again in remainders [3rd]TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。3 |6 s9 ^* r7 H6 \
Got the heavier ball. |