I’ve been active duty military for the better part of 20 years and it’s been more than 15 since I’ve taken math. I started with college algebra for a foundational refresher. I’ve returned to school with the goal of beginning a graduate program in Economics upon reaching military retirement. Not surprisingly, it took some serious studying to get back into a mathematical flow. I fumbled through some topics, but did fine overall. It’s humbling to see the level of math education on this forum. My question is, has anyone here started that low? If so, how easily were you able progress through to advanced calculus, linear algebra, real analysis and beyond? Finally, how many Econ grad students do you see in their 40s, and is age a factor for admissions? Thank you for your insights.