I'm embarassed somewhat to say this, but over the past few weeks I've been taking the courses on Khan Academy on mathematics. I'm nearly 30. and I'm not talking about brushing up on my linear algebra, that comes later, I'm talking high school level mathematics, stuff that I've largely forgotten or didn't "get" first time round. I've seen these "machine learning for hackers!" articles who try to dish out a bit of math…
I feel the same way though, I've been looking back through some basic algebra on Khan Academy too because I feel maths is very much my weak point.