ADHD is very heritable, almost as much as height. So it is pretty likely, indeed.

PS: I can grasp math concepts if explained in certain ways. I had to take a below grade level math class in middle school and needed a tutor for algebra. I blame the teachers lol. I somehow managed to get through all the math in my engineering degree (wtf was I thinking?).

Later on in life I struggled to understand Kalman filters until an online course explained it in a really accessible way, and related it to another class that was well taught on Bayesian statistics. It all clicked. But if I stare at typical math textbooks, it might as well be written in hieroglyphics. It just doesn't sink in.