Ordinal Numbers

• Cardinal numbers express quantity: two (2), thirty-five (35) etc...
• Ordinal numbers indicate order or rank: first (1st), second (2nd), third (3rd) etc...

For most ordinal numbers, the ending '-th' is used, with one or two exceptions for those inevitable irregular numbers:-

CARDINAL NUMERAL	IN WORDS	ORDINAL NUMERAL	IN WORDS
1	one	1st	the first
2	two	2nd	the second
3	three	3rd	the third
4	four	4th	the fourth
5	five	5th	the fifth
6	six	6th	the sixth
7	seven	7th	the seventh
8	eight	8th	the eighth
9	nine	9th	the ninth
10	ten	10th	the tenth

Ordinal numbers 1 to 19

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In figures	In words	Pronounce It
1st	the first	1st
2nd	the second	2nd
3rd	the third	3rd
4th	the fourth	4th
5th	the fifth	5th
6th	the sixth	6th
7th	the seventh	7th
8th	the eighth	8th
9th	the ninth	9th
10th	the tenth	10th
11th	the eleventh	11th
12th	the twelfth	12th
13th	the thirteenth	13th
14th	the fourteenth	14th
15th	the fifteenth	15th
16th	the sixteenth	16th
17th	the seventeenth	17th
18th	the eighteenth	18th
19th	the nineteenth	19th

Ordinal numbers such as 21st, 33rd etc are formed by combining a CARDINAL ten with an ORDINAL unit.

The "y" of "twenty", "thirty", "forty", etc. is changed to "ieth":-

20th	the twentieth	20th
21st	the twenty-first
22nd	the twenty-second	...
23rd	the twenty-third	...
24th	the twenty-fourth

30th	the thirtieth	30th
40th	the fortieth	40th
50th	the fiftieth	50th
60th	the sixtieth	60th
70th	the seventieth	70th

80th	the eightieth	80th
90th	the ninetieth	90th
100th	the hundredth	100th

101st	the hundred and first	...
1000th	the thousandth