At the age of 40 now, I have a strong desire to re-learn math. Up until the age of 22 or so, I excelled. Now most of the knowledge is gone. Two days ago I wa

At the age of 40 now, I have a strong desire to re-learn math. Up until the age of 22 or so, I excelled. Now most of the knowledge is gone. Two days ago I was writing some code that required me to solve an equation. I picked up a pen and paper and thought I should be able to quickly figure it out. But my mind couldn't find the tools it needed to formulate what was a pretty simple problem. It took me a few minutes to struggle through what would have been easy when I was 18. During the last 20 years, I gained lots of skills and kept up with software development. But the core stuff like math slipped away. I feel I can relearn major chunks of it and intend to. I think if your mind is constantly learning, you will always have the ability to re-learn the old things again.