I know that it leaves 10 times 10 as the last question and I thought leaving it as a 'grande finale' was kind of nice. I first considered some algorithm that favoured the lower numbers and there by increased the difficulty at the end of the program (my son thinks larger numbers are more difficult). But this was just a 5 minute hack, so i didn't put that much effort into it.

I'll change the comment in the code to explain this behaviour. Thanks for your explanation.

/brother t0mas