Comments on: Techniques for adding the numbers 1 to 100 http://betterexplained.com/articles/techniques-for-adding-the-numbers-1-to-100/ Learn Right, Not Rote. Fri, 03 Feb 2012 19:38:49 +0000 hourly 1 http://wordpress.org/?v=3.2.1 By: RAHMAN http://betterexplained.com/articles/techniques-for-adding-the-numbers-1-to-100/#comment-40736 RAHMAN Wed, 18 Jan 2012 15:22:14 +0000 http://betterexplained.com/articles/techniques-for-adding-the-numbers-1-to-100/#comment-40736 I need an answer for my question that, we will get a total sum 49, when we use 10 odd numbers. you can repeat any odd numbers - please answer if anybody can do it. ( ex: 1+3+5+7+7+7+=30) same way we have to get 49, by using 10 odd numbers. I need an answer for my question that, we will get a total sum 49, when we use 10 odd numbers. you can repeat any odd numbers – please answer if anybody can do it. ( ex: 1+3+5+7+7+7+=30) same way we have to get 49, by using 10 odd numbers.

]]> By: kalid http://betterexplained.com/articles/techniques-for-adding-the-numbers-1-to-100/#comment-40398 kalid Tue, 17 Jan 2012 20:10:59 +0000 http://betterexplained.com/articles/techniques-for-adding-the-numbers-1-to-100/#comment-40398 @Moses: Great question -- I need to learn more about the sum of squares formula, but I think it's a lot more difficult to derive. @Moses: Great question — I need to learn more about the sum of squares formula, but I think it’s a lot more difficult to derive.

]]> By: Moses http://betterexplained.com/articles/techniques-for-adding-the-numbers-1-to-100/#comment-39446 Moses Sun, 15 Jan 2012 18:05:48 +0000 http://betterexplained.com/articles/techniques-for-adding-the-numbers-1-to-100/#comment-39446 This was interesting. Is there a way to derive the formula for 1^2 + 2^2 +3^2 + ... +n^2? I am looking for a derivation, not a proof by induction. This was interesting.

Is there a way to derive the formula for 1^2 + 2^2 +3^2 + … +n^2?
I am looking for a derivation, not a proof by induction.

]]> By: ssed http://betterexplained.com/articles/techniques-for-adding-the-numbers-1-to-100/#comment-37457 ssed Wed, 11 Jan 2012 05:38:03 +0000 http://betterexplained.com/articles/techniques-for-adding-the-numbers-1-to-100/#comment-37457 quick question. i am working on a problem and i would appreciate a review! the question is as follows. find the sum of all numbers from 1+2+3...+3899 i did this by simply dividing 3899 by two, which gave me 1949. i then multiplied 1949x3899+1 and got 7,599,152 for an answer, am i doing this correctly? quick question. i am working on a problem and i would appreciate a review! the question is as follows. find the sum of all numbers from 1+2+3…+3899 i did this by simply dividing 3899 by two, which gave me 1949. i then multiplied 1949×3899+1 and got
7,599,152 for an answer, am i doing this correctly?

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