There was game called math lines. And you had to pick a nuber and find the factor of that numer. There are numbers moving on a line and and thet are moving toward a hole if a number reaches a hole it's game over. Well lets say the numger is 12 and the next number in the canon was 6 try to find a 6 on the number line if you see it shoot at it. Now it equals 12. Take a lot of strategy though.




http://www.coolmath-games.com/0-math-lines-xfactor/index.html