I am doing abstract math most of the time so I occasionally forget some products, have to recompute those from neighbouring ones. You just forget stuff when you rarely use it, especially if it's memorization related.
Took me a minute to remember how you're supposed to multiply fractions. Haven't had to do any of that since, I think like 5th grade. Turns out you can live most of your life on decimals.
how tf you gonna say 65, what are you on? 5, 10 and 9 are the easiest multiplication table number. And Fractions are indeed unfair (even if that one is easy), and so is 7x8