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No. XI.—A LARGER BORDERED MAGIC SQUARE

Оглавление

Here is another example of what is called a “bordered” Magic Square:—

5 80 59 73 61 3 63 12 13
1 20 55 30 57 28 71 26 81
4 14 31 50 29 60 35 68 78
76 58 46 38 45 40 36 24 6
7 65 33 43 41 39 49 17 75
74 64 48 42 37 44 31 18 8
67 10 47 32 53 22 51 72 15
66 56 27 52 25 54 11 62 16
69 2 23 9 21 79 19 70 77

These 81 cells form a complete magic square, in which rows, columns, and diagonals add up to 369. As each border is removed fresh Magic Squares are formed, of which the distinctive numbers are 287, 205, and 123. The central 41 is in every case the greatest common divisor.

Twentieth Century Standard Puzzle Book

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