Math Ninja is a good, free Windows game, that is part of the category PC games with subcategory Educational.
More about Math Ninja
It's available for users with the operating system Windows 98 and prior versions, and you can get it in English. The current version of the game is 1.01 and was updated on 12/02/2007.
Math Ninja is a fairly light game that does not require as much space than many games in the category PC games. It's very heavily used in United States, Republic Of Moldova, and Romania.
Since we added this game to our catalog in 2007, it has managed to reach 19,575 downloads, and last week it had 14 downloads.