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put six on each side .. take the heaviler side and put three on each side 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。6 \" K/ e. c% U) W4 N! N$ r
take two balls out of the heaviler side and put on each side / V; `* e/ _0 _; ~7 f4 m
if they r the same the reminder is the heavy ball otherwise u know which one is the heavy ball