Native Korean, and which set when
Korean's other number set is its own: 하나 (hana), 둘 (dul), 셋 (set) and on up, words Korean had long before it borrowed 일, 이, 삼.
Not open yet
This day is part of Pro, which will be $8.99 a month or $119 once for Lifetime, tax included. It is written; payment is still being built, and it opens when that lands.
This day covers 하나, 둘, 셋, 넷, 다섯, 여섯, 일곱, 여덟, 아홉, 열, 스물, 서른, 마흔, 쉰, 예순, 일흔, 여든, 아흔, 아흔아홉
Open to everyone right now: days 1 to 3 of this course, the whole Hangul course, the Hangul chart, all 559 vocabulary words, the grammar reference, the 14 situation guides, the review deck and the printable charts.