3x3 (not pure) in 5x5 (pure) magic square

 

The smallest odd inlay square is a (not pure) 3x3 magic square inside a (pure) 5x5 magic square. It is possible to use the consecutive middle 9 digits from 1 up to 25 to construct the inlay. Use the 8 highest digits and the 8 lowest digits to construct the border. See the result below:

 

 

Digit + 8            =       add border       =    3x3 in 5x5 magic square

                    22 18 3 2 20
2 9 4     10 17 12     7 10 17 12 19
7 5 3     15 13 11     5 15 13 11 21
6 1 8     14 9 16     25 14 9 16 1
                    6 8 23 24 4

 

 

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5x5, 3x3 in 5x5 concentric magic square
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