Magic Square (MagicSquare).
Description: Arithmetic calculation game (not only) for primary school pupils: Use basic arithmetic operation plus or
minus to fill in the missing numbers in the square. To play, click "Fro" (question) to create a new square with 4 numbers displayed; fill in
the empty fields by doing the corresponding additions or subtractions; when done, click "Äntwert" (answer) to check if your solution is
Free Pascal features: Menus, checkgroups, array of edit fields, push button with variable caption, shapes.