English Numeral

Cardinal numbers

Cardinal numbers refer to the size of a group.

0	zero (nought)	10	ten
1	one	11	eleven
2	two	12	twelve	20	twenty
3	three	13	thirteen	30	thirty
4	four	14	fourteen	40	forty (no "u")
5	five	15	fifteen (note "f", not "v")	50	fifty (note "f", not "v")
6	six	16	sixteen	60	sixty
7	seven	17	seventeen	70	seventy
8	eight	18	eighteen (only one "t")	80	eighty (only one "t")
9	nine	19	nineteen	90	ninety (note the "e")

If a number is in the range 21 to 99, and the second digit is not zero, one should write the number as two words separated by a hyphen.

21	twenty-one
25	twenty-five
32	thirty-two
58	fifty-eight
64	sixty-four
79	seventy-nine
83	eighty-three
99	ninety-nine

In English, the hundreds are perfectly regular, except that the word hundred remains in its singular form regardless of the number preceding it (nevertheless, one may on the other hand say "hundreds of people flew in", or the like)