<!-- Origin Article URL: http://www.wretch.cc/blog/cderty/26535191 --> 一斤半鹽換斤油,<br/> <br/> 五萬斤鹽載一舟,<br/> <br/> 斤兩內除相為換,<br/> <br/> 須教二色一般籌。<br/> <br/> (即交換後使油鹽的數量一樣多)<br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> Ans:一斤半鹽換斤油,即每2.5斤鹽中,應有1斤油和1斤鹽,所以船中載油鹽數各為:<img src="http://f10.wretch.yimg.com/cderty2006/1/1963031249.jpg" alt=""/>(斤)