1. 1st divide to half take the heavier out , |, F% ^: t! C' J/ x) _" }' h3 S2. 2nd take 4 balls out of 5 divide 2 groups to get the heavier out. (if is equal thn the remain is the one u looking for) " ~4 u4 u$ J7 W$ ]8 S% ]) u0 XTVBNOW 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. Same method if is not equal on 2nd try.
發表於 2011-11-1 01:28 PM
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