數學老師幫你算好了 高鐵票分段買最便宜 - 省錢
By Dorothy
at 2019-03-02T07:19
at 2019-03-02T07:19
Table of Contents
數學老師幫你算好了 高鐵票分段買最便宜
https://tw.news.appledaily.com/life/realtime/20170815/1182000/
覺得高鐵票「貴桑桑」嗎?沒關係,數學老師有新解,分段買可撿到便宜!台師大數學系
助理教授郭君逸,日前在《UniMath (You Need Math)》數學科普網站發表《高鐵票分段
買比較便宜?》專文,引發極大迴響,根據他精算結果,台北到左營(高雄)自由座,單
趟票價1445元,分段購票只要1425元,搭一趟省20元,等於免費奉送2顆超商茶葉蛋。
正在歐洲參訪的郭君逸接受《蘋果》越洋電訪時指出,高鐵票分段拆買並不違法,如果覺
得在櫃台購票,一一拆票太耗費時間影響他人,只要到自動售票機買票就無此困擾,只不
過有點麻煩。他強調,精算出分段購票價差,主要用意還是在讓民眾了解,數學可能讓不
少人在求學過程吃足苦頭,有如夢魘,但其實數學在生活中絕對可以活用。
郭君逸解釋,分段購票會出現價差,主要原因是高鐵依基本費率、里程核算標準車廂票價
後,最後是以四捨五入到十位數訂價,因此就可能出現價差。舉例來說,假設台北到左營
(高雄)核算票價是46元,四捨五入後訂價變50元,但台北到台中、台中到左營(高雄)
核算票價各要23元,四捨五入後變20元,台北到左營(高雄)拆成兩段購票就可省下10元
。
郭君逸說,拆票原理看似不難,最麻煩的還是在怎麼拆,以台北到左營(高雄)為例,中
途最多可停靠10站,最原始的算法就是把各種排列組全算一次,只要算2的10次方,1024
次就可找到最低票價。
備註:
有人試過這招嗎?
分享一下,感覺人不多的時候,可以在自動售票機試試
--
https://tw.news.appledaily.com/life/realtime/20170815/1182000/
覺得高鐵票「貴桑桑」嗎?沒關係,數學老師有新解,分段買可撿到便宜!台師大數學系
助理教授郭君逸,日前在《UniMath (You Need Math)》數學科普網站發表《高鐵票分段
買比較便宜?》專文,引發極大迴響,根據他精算結果,台北到左營(高雄)自由座,單
趟票價1445元,分段購票只要1425元,搭一趟省20元,等於免費奉送2顆超商茶葉蛋。
正在歐洲參訪的郭君逸接受《蘋果》越洋電訪時指出,高鐵票分段拆買並不違法,如果覺
得在櫃台購票,一一拆票太耗費時間影響他人,只要到自動售票機買票就無此困擾,只不
過有點麻煩。他強調,精算出分段購票價差,主要用意還是在讓民眾了解,數學可能讓不
少人在求學過程吃足苦頭,有如夢魘,但其實數學在生活中絕對可以活用。
郭君逸解釋,分段購票會出現價差,主要原因是高鐵依基本費率、里程核算標準車廂票價
後,最後是以四捨五入到十位數訂價,因此就可能出現價差。舉例來說,假設台北到左營
(高雄)核算票價是46元,四捨五入後訂價變50元,但台北到台中、台中到左營(高雄)
核算票價各要23元,四捨五入後變20元,台北到左營(高雄)拆成兩段購票就可省下10元
。
郭君逸說,拆票原理看似不難,最麻煩的還是在怎麼拆,以台北到左營(高雄)為例,中
途最多可停靠10站,最原始的算法就是把各種排列組全算一次,只要算2的10次方,1024
次就可找到最低票價。
備註:
有人試過這招嗎?
分享一下,感覺人不多的時候,可以在自動售票機試試
--
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省錢
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