Topic	Magic Square of 3. Order
	Magic squares are organised in this way that in each row, column and diagonal a "magic sum" can be calculated - in this case 15. The simplest one of order 3 (a square with 3x3) has only one solution (without rotations and mirroring).
Presentation	The report has 6 pages with just 0.4 MB file size - sorry, only in German
Data	The calculation with Excel contains just 2 sheets with 42 kB
Notes	Simple - but everybody has to do it by himself. December 2018