生日双胞胎 [英] Birthday Twins

问题描述

希拉和赫曼是双胞胎;希拉是OLDER双胞胎。假设他们是在彼此之后立即出生的，这是一个无限小的 - 但非零 - 相隔的时间。在他们生命中的一年中，希拉在赫曼之后的两天庆祝她的生日。这怎么可能？


奖金：Sheila和He-Man在同一年的生日庆祝活动中可以分开的最长时间是多少？我想这已经超过两天了。


注意：对于Sheila和He-Man来说，这些生日庆典都发生在实际的生日日期 - 这不是庆祝活动无论出于何种方便原因，都会在实际生日日期之前或之后的日期发生。此外，解决方案与相对论或任何其他复杂的无意义无关。

来自

--berkley.edu

解决方案

希拉和赫曼是双胞胎;希拉是OLDER双胞胎。假设他们是在彼此之后立即出生的，这是一个无限小的 - 但非零 - 相隔的时间。在他们生命中的一年中，希拉在赫曼之后的两天庆祝她的生日。这怎么可能？

如果Sheila是年龄较大的双胞胎她的生日可以Naver在He-Man's

之后

如果他们出生在11：59：.999999999在2月28日和12月，他们总是会在1天之间庆祝他们的生日。在闰年，他们将相隔两天。如果他们中的一个住在格林威治以西，一个住在格林威治以东，那么他们可以在闰年上分开3天生日。

如果他们中的一个住在格林威治以西，而一个住在格林威治以东，那么他们可以在闰年上分开3天的生日。

我不认为你的意思是格林威治我认为你的意思是国际日期线，距离格林威治大约180度以东（或西边:-)）。

Sheila and He-Man are twins; Sheila is the OLDER twin. Assume they were born immediately after each other, an infinitesimally small - but nonzero - amount of time apart. During one year in the course of their lives, Sheila celebrates her birthday two days AFTER He-Man does. How is this possible?

Bonus: What is the maximum amount of time by which Sheila and He-Man can be apart in their birthday celebrations during the same year? I think it''s more than two days.

Note: For both Sheila and He-Man, these birthday celebrations happen on the actual birthday date -- it cannot be a celebration that occurs at a date earlier or later than the actual birthday date for whatever reasons of convenience. Also, the solution has nothing to do with the theory of relativity or any other over complicated nonsense like that.

From
--berkley.edu

解决方案

Sheila and He-Man are twins; Sheila is the OLDER twin. Assume they were born immediately after each other, an infinitesimally small - but nonzero - amount of time apart. During one year in the course of their lives, Sheila celebrates her birthday two days AFTER He-Man does. How is this possible?

If Sheila is the older twin her Birthday can Naver be after He-Man''s

If they were born at 11:59:.999999999 on February 28th and 12:00 precisley they would always celebrate their birthdays 1 day apart. On a leap year they would be two days apart. If one of them lived just west of Greenwich and one just east of Greenwich, then they could have their birthday 3 days apart on a leap year.

If one of them lived just west of Greenwich and one just east of Greenwich, then they could have their birthday 3 days apart on a leap year.

I don''t think you mean Greenwich I think you mean the International Date Line which is about 180 degrees east (or is it west :-)) round the earth from Greenwich.

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