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Primal Magic Square (Posted on 2004-03-09) Difficulty: 4 of 5
Find a 3x3 magic square that is composed of 9 prime numbers (not the numbers from 1-9) and show how you found it.

(A magic square, as you may already know, is one in which the respective sums of the numbers in all the rows, columns, and both major diagonals all add up to the same number.)

Since "Magic Square" is a term used outside the scope of this problem, I'm sure you can find an answer on the internet. Please find a solution independently.

See The Solution Submitted by SilverKnight    
Rating: 3.0000 (4 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
re: an unimaginative solution - but an honest one! | Comment 2 of 15 |
(In reply to an unimaginative solution - but an honest one! by Jane Doe)

First, I think your interpretation is "literally" correct.  But I didn't mean that one couldn't use the primes: 2, 3, 5, and 7... just that the solver wasn't to use ONLY the 9 numbers (1-9).

That being said, Jane, your solution is a correct one.  Unfortunately, I'm guessing that you found this on the internet or in a book, or some other source, as you did not show how you found it.

For others' benefit, there ARE other solutions to this problem.

  Posted by SilverKnight on 2004-03-09 15:29:25

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