The applet below can be used to generate magic squares with odd sides (1, 3, 5 of 7). After some experiments you will probably discover the construction method, enabling you to make bigger squares for yourself. Here, a magic square is considered to be a sqare filled with integer numbers from a monotonic sequence, i.e. a sequence having a constant difference between consecutive elements, in such a way that all sums of rows, columns and both diagonals are equal.
Choose the desired size of the square in the choice list in the upper left corner. If everything works properly a square of empty text fields appears, with comments on the sides and some extra text fields for row, column and diagonal totals. Type the horizontal and vertical positions of the first number of the abovementioned monotonic sequence in both text fields below the text 'Coordinaten beginvak:'. Next type the values of this first number and the constant difference to the right of the texts 'Basis' and 'Increment'. Then, clicking the button 'Maak vierkant' (make square), the desired square is generated. Although... in most cases only a semi-magic square appears. Clicking the button 'Bereken sommen' (compute sums), you may notice that all row and column sums always match, but most likely one or both diagonal sum(s) (the squares below, extreme left and right) do not. It is up to you to play with the input data until you find a true magic square! By the way, another possibility of using the applet is trying to make a magic square from scratch, by typing the numbers into the text fields yourself, using trial and error. Checking the sums is possible at any time if you click on 'Bereken sommen'.
Last updated June 1st, 2006
Back to Other professional activities
Back to Professional home page
Back to Joop's home page in English.
Terug naar Joop's home page in het Nederlands