Korean have two counting systems, "Native Korean" numbers and "Sino Korean" numbers system..
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•••> Sino korean is borrowed from Chinese
and it is used for;
■ years, dates, days, minutes and seconds, currency, phone numbers, maths, adress, and degrees (temperature)★☆★☆★☆★☆★☆
•••> Native korean numbers are used for ;-
■ counting.. for example like, (one..two..three..go! = hana.. dul..set..go! )
■ hours
■ age