Problem 240. Project Euler: Problem 6, Natural numbers, squares and sums.

Created by Doug Hull

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Solution Stats

2213 Solutions
1018 Solvers

Last Solution submitted on Jan 14, 2021

Last 200 Solutions

Problem Comments

3 Comments

3 Comments

John D'Errico on 28 Aug 2016

A problem where one must be at least a little careful about floating point arithmetic. It might have been interesting if one of the test cases were x=1e5 or larger. Even more interesting if the execution time were a factor in the "score". These factors might impact how the problem would be best solved.

Srishti Saha on 13 Oct 2018

@ Doug Hall, I have solved all the problems in the series. However, I have not received the badge and the associated scores on completion of the series. Can you please look into this?

Yunpeng Teng on 4 Dec 2020

function y = euler006(x)
y = x*(x^2-1)*(3*x+2)/12;
end

化简1到x的求和公式的平方减去1到x^2的求和公式即可。

Solution Comments

Solution 2289121

1 Comment

1 Comment

Trusted on 17 May 2020

Adding comment for testing badges!!

Solution 1964291

1 Comment

1 Comment

Reece Taylor on 7 Oct 2019

Is there a more compact way to calculate the sum of squares? (like how I calculated the square of sums)

Solution 1555241

2 Comments

2 Comments

durga sadasivuni on 9 Jun 2018

My solution is failing,please help me out

J. S. Kowontan on 9 Jun 2018

1. You used the wrong formula for the sum of the squares of the the first x natural numbers. 2. Also, your implementation of the square of the sum of the first x natural number is incorrect. 3. Finally, You are to subtract (1) from (2) not the other way round.

Solution 605109

1 Comment

1 Comment

Haw wawa on 13 Feb 2016

How can I view the solution?

Solution 441814

1 Comment

1 Comment

Joseph Pauwels on 12 May 2014

can someone explain what the value and size of a correct answer means.

Solution 440215

1 Comment

1 Comment

Daniel Pereira on 8 May 2014

I think simpler is impossible. The only thing is that it needs 8 operations...
:(

Solution 120005

2 Comments

2 Comments

William Smith on 25 Sep 2012

For loops, not cool!

Doug Hull on 26 Sep 2012

William, Why are for loops not cool?

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Problem 240. Project Euler: Problem 6, Natural numbers, squares and sums.

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Problem 240. Project Euler: Problem 6, Natural numbers, squares and sums.

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