Problem 151. Magic!

Created by the cyclist
Appears in Indexing III

Difficulty:Rate

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Check whether the input matrix is a normal magic square:
http://en.wikipedia.org/wiki/Magic_square
Output the logical value true or false.

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Last Solution submitted on Apr 02, 2025

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the cyclist on 8 Mar 2013

I was not notified about some of the older comments, so was unaware of some of the weaknesses of the test suite, and the "gamed" solutions. I have substantially improved the test suite.

the cyclist on 8 Mar 2013

The MATLAB command magic(2), although it does produce output, is not a magic square, according to the definition. (There is no 2x2 magic square.)

Dyuman Joshi on 7 Feb 2023

Test cases have been added to the problem.

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Problem 151. Magic!

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