2. Cardinal numbers: 0 = zero 1 = one 2 = two 3 = three 4 = four 5 = five 6 = six 7 = seven 8 = eight 9 = nine 10 = ten 11 = eleven 12 = twelve 13 = thirteen 14 = fourteen 15 = fifteen 16 = sixteen 17 = seventeen 18 = eighteen 19 = nineteen 20 = twenty 21 = twenty-one

3. Cardinal numbers: 30 = thirty 40 = forty 50 = fifty 60 = sixty 70 = seventy 80 = eighty 90 = ninety 100 = one hundred 101 = one hundred (and) one 1,000 = one thousand 1,001 = one thousand (and) one

4. Ordinal numbers: 1 st = fir st 2 nd = seco nd 3 rd = thi rd 4 th = four th 5 th = fif th 6 th = six th 7 th = seven th 8 th = eigh th 9 th = nin th 10 th = ten th 11 th = eleven th 12 th = twelf th 13 th = thirteen th 14 th = fourteen th 15 th = fifteen th 16 th = sixteen th 17 th = seventeen th 18 th = eighteen th 19 th = nineteen th 20 th = twentie th 21 st = twenty- first

5. Ordinal numbers: 30 th = thirtie th 40 th = fortie th 50 th = fiftie th 60 th = sixtie th 70 th = seventie th 80 th = eightie th 90 th = ninetie th 100 th = one hundred th 101 st = one hundred (and) first 1,000 th = one thousand th 1,001 st = one thousand (and) first