I remember some time ago watching an episode of the Joe Rogan show(it had some comedic value back then) He and his friends were talking about the MIT admittance exam, pointing out the square root in the maths problem as an indication that this math problem was really hard. And I thought to myself "that's what primary school children learn around here at age 12 in my literally 3rd world country".
Pythagoras was around the same time. I'd like to warn people that not understanding these basic math concepts makes you appear uneducated to many people internationally.