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Just to clarify, I didn't mean a single operator in solving the puzzle - that I knew.

I refer to the means of conversion - does

Find a way to convert it
mean you must do the same mathmatical "thing" to all 9 numbers and get them to "solve" to 21?
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Just to clarify, I didn't mean a single operator in solving the puzzle - that I knew.

I refer to the means of conversion - does mean you must do the same mathmatical "thing" to all 9 numbers and get them to "solve" to 21?

Without commenting on the nature of what you do,

do the same thing to each of the numbers to get a new srt of numbers.

The new set of numbers, each in its respective place, forms a 21 magic square.

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Is it just me or was this very easy?



28 15 2

12 8 25
5 22 18
subtract 8 from each number


20 7 -6

4 0 17
-3  14 10

Well, [1] yes that works :D and [2] it is too easy. ;)

To be more responsive to Writersblock's question: What I have in mind is not mathematical.

The numbers have a property that surprisingly creates a new magic square.

That the new MS sums to 21 is just a piece of information that lets you verify that the MS you will have found is the one I had in mind.

Have Fun ... !

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