2012 年 5月 13 日随笔档案 - 尔冬橙

欧拉计划第7题 Find the 10001st prime. 找出第10001个素数。

摘要：欧拉计划,第7题,找出第10001个素数阅读全文

posted @ 2012-05-13 23:02 尔冬橙阅读(323) 评论(0) 推荐(0) 编辑

欧拉计划第6题 What is the difference between the sum of the squares and the square of the sums?和的平方与平方的和的差。

摘要： The sum of the squares of the first ten natural numbers is,12 + 22 + ... + 102 = 385The square of the sum of the first ten natural numbers is,(1 + 2 + ... + 10)2 = 552 = 3025Hence the difference between the sum of the squares of the first ten natural numbers and the square of the sum is 3025 385 = . 阅读全文

posted @ 2012-05-13 22:29 尔冬橙阅读(250) 评论(0) 推荐(0) 编辑

欧拉计划第5题 What is the smallest number divisible by each of the numbers 1 to 20? 1到20的所有数的最小公倍数。

摘要： 2520 is the smallest number that can be divided by each of the numbers from 1 to 10 without any remainder.What is the smallest positive number that is evenly divisible by all of the numbers from 1 to 20? static void Main(string[] args) { long startTime, endTime; Int64 f=... 阅读全文

posted @ 2012-05-13 22:04 尔冬橙阅读(295) 评论(0) 推荐(0) 编辑

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