Like you, I went back to school later in life, but I was a young 40 and I was studying psychology. I was the oldest in all my classes - no one else was even close. And I also had to take a class in statistics, which I hated. Luckily, I'd just take a stats course in the undergrad work I was doing to prep for the doctoral program - and so I was able to take a test to prove I didn't need to take it again. I barely passed the test, but was very happy I didn't have to take it again.