this is too easy!!
9 l/ R8 o' T4 s4 r* ]
: ]' S0 t% H w1. put 6 at each side.. take the one side which is heavier3 B% @. L; R! p: n
2. put 3 at each side.. also take the heavier sideTVBNOW 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。. A4 X9 U$ {! W9 r' a
3. put 1 at each side.. if the weight balance then the one not put inside is the heavy ball.. else the side which is heavier is the heavier ball.. |
發表於 2009-1-7 05:31 AM
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