Numbers 0 – 100 0 zero 11 eleven 22 twenty-two 1 one 12 twelve 23 twenty-three 2 two 13 thirteen 24 twenty-four 3 three 14 fourteen 30 thirty 4 four 15 fifteen 40 forty 5 five 16 sixteen 50 fifty 6 six 17 seventeen 60 sixty 7 seven 18 eighteen 70 seventy 8 eight 19 nineteen 80 eighty 9 nine 20 twenty 90 ninety 10 ten 21 twenty-one 100 a hundred .