This was my college panic trigger. If I went to an exam or made an assignment that felt way too simple or way too easy I would immediately start to panic that I'm not a genius. I'm probably just too dumb to realize that my understanding of the task is wrong, that there was a trick, twist or hidden element I wasn't taking into account.
I'm here in the comments to see if I'm missing something about the math and, also, too chicken to put an answer out there
Reminds me of Friends when Joey was telling Phoebe's brother about marrying an older women (Eric Foreman's mom).
Okay wait I can just find the clip, https://youtu.be/hdYKyzVNhZE?si=wl5H2VAlv1fWQerv here it is. I'm not gonna lie, I didn't get the joke on first watch. It took me longer than I'd like to admit.