And you should solve each problem within 0.5 1 1.5 2 3 4 5 7 10 15 20 30 minutes.

Please take note that WIMS pages are interactively generated; they are not ordinary HTML files. They must be used interactively ONLINE. It is useless for you to gather them through a robot program.

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