Magic rectangles is a variation of this principle:
you are before a table of

rows and

colomns, with a given number at the side of each row and each column.
Your goal is to fill this table using the numbers
par les nombres 1,2,...,lignes×colonnes, so that the

of each row and each column equals the corresponding given number.
And of course no number can be used twice.

And you should solve each problem within
minutes.

The most recent version

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Description: game based on a variation of magic squares. interactive exercises, online calculators and plotters, mathematical recreation and games

Keywords: interactive mathematics, interactive math, server side interactivity, algebra, magic square, sum, product, table, matrix