💡 Why two levels?
Once you start working in Korea, you'll need to handle real numbers fast. As of 2026, the minimum annual salary in Korea is ₩25,882,560 — so knowing Sino-Korean numbers up to the hundred-millions place is a practical necessity, not just an academic exercise.
Basic covers the core units: 일 (1) through 십 (10), plus every power of ten up to 일억 (100,000,000) — the essential building blocks of every larger number.
Advanced tests you on the full range up to 99,999,999, combining all units across random values to simulate real-life reading.
