It’s Friday, which means…
It’s free for all Friday time!
Any questions you’ve got, about maths or anything else, pop them in the comments. I’m in the middle of the deadline doldrums (the next Dummies book won’t write itself, you know!) but I’ll pop in once in a while to answer when I need a break. That’s what Free for all Friday is all about!
Edited 2014-09-21 to fix link.