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You are not logged in. #1 20050512 12:08:09
Sum of positive integers 0 to NI am looking for different ways to answer this problem? #2 20050512 16:39:56
Re: Sum of positive integers 0 to NOff the top of my head, you can do it with one multiplication. MiddleValue times N. "The physicists defer only to mathematicians, and the mathematicians defer only to God ..."  Leon M. Lederman #3 20050514 04:34:31
Re: Sum of positive integers 0 to NI have learned this formula before. It is connected with mathematical induction. German mathematician Gauss, when he was 7 years old, thought of this formula. His teacher told students to find the sum of numbers, starting from 1 to 100. He thought that students won't finish it in next 30 minutes, but Gauss did. n(n+1)/2 where n is the last number. 