In theory I understand which number system to use for what, but in practice it's just not that easy for me, I just found out I've been telling people my age wrong for the last three months.
Are there some simple rules or do you just memorize when to use which?
I'm in my twenties and my sister is few years old. I've been trying to learn a new language and I'm failing miserably, she's learning a second language at school effortlessly.
I know that's generally the case, but why?
I didn't even know that was a thing, but my friend that is learning Korean as well, was just telling me about different accents depending on where in Korea are you.
Which one for people that are learning is the hardest for you to understand?
Before Hangul, Koreans wrote using Classical Chinese characters. It was so complex only wealthy elites could master it.
King Sejong the Great changed that in 1443 by designing an entirely new alphabet specifically for common people. Hangul was created from scratch in only 3 years. It was completed in 1443 and published in 1446. The original document introducing it claimed a wise person could learn it in a single morning.
Linguists still consider it one of the most logically designed writing systems ever created. South Korea celebrates it every year on October 9th as a Hangul Day.