수(Number) 기수(Cardinal Number) 1 one 11 eleven 10 ten 2 two 12 twelve 20 twenty 21 twenty-one 3 three 13 thirteen 30 thirty 32 thirty-two 4 four 14 fourteen 40 forty 43 forty-three 5 five 15 fifteen 50 fifty 54 fifty-four 6 six 16 sixteen 60 sixty 65 sixty-five 7 seven 17 seventeen 70 seventy 76 seventy-six 8 eight 18 eighteen 80 eighty 87 eighty-seven 9 nine 19 nineteen 9..