Korean uses two systems of numbering; the first form is the native Korean, and is used for counting numbers of things except currency up to 99. The second form originates from Chinese, and is used for counting currency, numbers larger than 99, and numbers followed by units. Hence, counting numbers of e.g. push-ups or punches would use the first system (ha nah, dool, seht, etc), whereas the Korean for first dan would be il dan, two direction is i-bang, three-step sparring is sambo matsogi, and so forth.

Please be aware that this is a necessary simplification: for more reading, try Counting Numbers in Korean or Korean Numerals on Wikipaedia.

Nb: the spellings shown below are the modern phonetic pronunciations, and may differ from the tradidtional phonetics used elsewhere in this website, as Taekwon-Do uses the more traditional spellings. Where this may cause untoward confusion, the traditional spelling is shown in brackets.