Therefore, I did the sensible thing: I wrote a computer program (using a klik-and-build style of thing called Widget Workshop- more of a circuit board modeler than anything else) to test me on arithmatic for speed.
Anyway, it's availible at my website. (Download EXE)
It's quite fun- and it's telling me I'm better off than I thought, when I recently got 11 right and only one wrong in 10 minutes. When it's giving you three digit/three digit multiplication, that's HARD. (Although you can get something as easy as 2+2. It's all in the Randomizers.)
Feedback, support, flames?