There are two number systems (cardinal numbers) that are used in everyday life in Korea. One system is purely Korean and mainly used in counting. The other number system is borrowed from China and it is called Sino-Korean number system. Why two systems??? Mmm... I don't know.
Native Korean Numbers
1. 하나 /Hana/
2. 둘 /Dul/
3. 셋 /Set/
4. 넷 /Net/
5. 다섯 /Daseot/
6. 여섯 /Yeoseot/
7. 일곱 /ilgop/
8. 여덟 /Yeodeol/
9. 아홉 /Ahop/
10. 열 /Yeol/
11. 열하나 /yeol hana/
12. 열둘 /yeol dul/
Sino-Korean Numbers
1. 일 /il/
2. 이 /i/
3. 삼 /sam/
4. 사 /sa/
5. 오 /o/
6. 육 /yuk/
7. 칠 /chil/
8. 팔 /pal/
9. 구 /gu/
10. 십 /sip/
11. 십일 /sibil/
12. 십이 /sibi/
sper ca va este catusi de putin de ajutor ^^.