The digits 1, 2, 3, 4, 5, 6, 7, 8, and 9 must be put in the square depicted below, in such a way that the sums of the numbers in each row, column, and diagonal are equal.

The question: How should the numbers be arranged in the square?

The answer: Click here!

Another question: The numbers 1 up to 16 must be placed in the circles of the square depicted below, in such a way that the sum of the numbers in each row, column, and diagonal amounts to 34. How should the numbers be arranged in the square?

Another answer: Click here!

Yet another question: The numbers 1 up to 25 must be placed in the circles of the square depicted below, in such a way that the sum of the numbers in each row, column, and diagonal amounts to 65. How should the numbers be arranged in the square?

Yet another answer: Click here!