KöMaL 2018 K599
Write the numbers 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 in the circles, so that the sum of the four numbers along any straight line should be the same, and the sum of the numbers at the six points of the star should also be the same number. A few numbers are already entered. Find all possible arrangements.
Official text KöMaL. Quoted with source.
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