Problem 1087. Magic is simple (for beginners)

Created by Jean-Marie Sainthillier

Solve Later

{"relationships":[{"relationshipType":"http://schemas.mathworks.com/matlab/code/2013/relationships/document","relationshipId":"rId1","target":"/matlab/document.xml"},{"relationshipType":"http://schemas.mathworks.com/matlab/code/2013/relationships/output","relationshipId":"rId2","target":"/matlab/output.xml"}],"parts":[{"partUri":"/matlab/document.xml","relationship":[],"contentType":"application/vnd.mathworks.matlab.code.document+xml","content":"<?xml version=\"1.0\" encoding=\"UTF-8\"?><w:document xmlns:w=\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\"><w:body><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>Determine for a magic square of order n, the magic sum m. For example m=15 for a magic square of order 3.</w:t></w:r></w:p></w:body></w:document>"},{"partUri":"/matlab/output.xml","contentType":"text/xml","content":"<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\" ?><embeddedOutputs><metaData><evaluationState>manual</evaluationState><layoutState>code</layoutState><outputStatus>ready</outputStatus></metaData><outputArray type=\"array\"/><regionArray type=\"array\"/></embeddedOutputs>"}]}

Solve

Solution Stats

11882 Solutions
5611 Solvers

Last Solution submitted on Oct 06, 2022

Last 200 Solutions

Problem Comments

8 Comments

8 Comments

Show 5 older comments

Michael Green on 8 Feb 2021

This problem could probably be explained a little better.

Dave on 30 Jun 2021

This is pretty simple given that there is a built in function to build magic squares. If not, the algorithm to "manually" build a magic square by filling a matrix is already well-known.

N/A on 1 Apr 2022

sounds interesting!

Gizem Deniz Akkas on 18 Apr 2022

may be good practice but explanation is confusing!

Ayush on 11 Jul 2022

good practice!

Patrick on 11 Jul 2022

Would be nice to include a image of magic square for those who are not familiar with it

Joseph Principe on 30 Jul 2022

Good problem

Farooq on 22 Sep 2022 at 12:28

I use the sum(n) and it gives me 15 for all the rows or the columns. What is wrong with this, because it does not accept this answer. I also calculated the sum of the first row to get just 15 once, still it does not accept it.

Solution Comments

Solution 6906209

1 Comment

1 Comment

Josh Klueber on 16 Nov 2021

tricky

Solution 5672575

1 Comment

1 Comment

john perkins on 4 May 2021

good problem

Solution 3543705

4 Comments

4 Comments

Show 1 older comment

Anshul Kumar Yadav on 4 Nov 2020

m= magic_sum(n)
z=magic(n);
m=sum(z(:));

why this aint working

HARSH RAITHATHA on 16 Nov 2020

@Anshul, Because here we want the sum of particular row, and your soln defines the sum of all the elements in the matrix!

Anshul Kumar Yadav on 26 Nov 2020

@harsh thanks

Isabella Stellitano on 7 Nov 2021

Good Problem

Solution 2516498

2 Comments

2 Comments

N Raghunadh on 11 Jun 2020

nice question

Umar farooq Mohammad on 2 Oct 2020

Good one

Solution 2132025

1 Comment

1 Comment

Sankari Narne on 18 Feb 2020

function m = magic_sum(n)
x = magic(n);
y = sum(x);
m= randsample(y,1);
end
why it is wrong?

Solution 1936838

Solution 1935707

1 Comment

1 Comment

Lohendran letchmanan on 14 Sep 2019

its hard

Problem Recent Solvers5611

Problem Tags

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Problem 1087. Magic is simple (for beginners)

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers5611

Suggested Problems

More from this Author43

Problem Tags

Community Treasure Hunt

Problem 1087. Magic is simple (for beginners)

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers5611

Suggested Problems

More from this Author43

Problem Tags

Community Treasure Hunt

Players