Table of Contents

## Definitions

A Cardinal Number is a number that says how many of something there are, such as 1, 2, 3, 4.

An Ordinal Number is a number that tells the position of something in a list, such as 1st, 2nd, 3rd, 4th.

Most ordinal numbers end in “th” except for:

one ⇒ first (1st)

two ⇒ second (2nd)

three ⇒ third (3rd)

## List of Cardinal and Ordinal Numbers

Cardinal | | | Ordinal | |

1 | One | 1st | First | |

2 | Two | 2nd | Second | |

3 | Three | 3rd | Third | |

4 | Four | 4th | Fourth | |

5 | Five | 5th | Fifth | |

6 | Six | 6th | Sixth | |

7 | Seven | 7th | Seventh | |

8 | Eight | 8th | Eighth | |

9 | Nine | 9th | Ninth | |

10 | Ten | 10th | Tenth | |

11 | Eleven | 11th | Eleventh | |

12 | Twelve | 12th | Twelfth | |

13 | Thirteen | 13th | Thirteenth | |

14 | Fourteen | 14th | Fourteenth | |

15 | Fifteen | 15th | Fifteenth | |

16 | Sixteen | 16th | Sixteenth | |

17 | Seventeen | 17th | Seventeenth | |

18 | Eighteen | 18th | Eighteenth | |

19 | Nineteen | 19th | Nineteenth | |

20 | Twenty | 20th | Twentieth | |

21 | Twenty one | 21st | Twenty-first | |

22 | Twenty two | 22nd | Twenty-second | |

23 | Twenty three | 23rd | Twenty-third | |

24 | Twenty four | 24th | Twenty-fourth | |

25 | Twenty five | 25th | Twenty-fifth | |

26 | Twenty six | 26th | Twenty-sixth | |

27 | Twenty seven | 27th | Twenty-seventh | |

28 | Twenty eight | 28th | Twenty-eighth | |

29 | Twenty nine | 29th | Twenty-ninth | |

30 | Thirty | 30th | Thirtieth | |

31 | Thirty one | 31st | Thirty-first | |

32 | Thirty two | 32nd | Thirty-second | |

33 | Thirty three | 33rd | Thirty-third | |

34 | Thirty four | 34th | Thirty-fourth | |

… | … | … | … | |

40 | Forty | 40th | Fortieth | |

50 | Fifty | 50th | Fiftieth | |

60 | Sixty | 60th | Sixtieth | |

70 | Seventy | 70th | Seventieth | |

80 | Eighty | 80th | Eightieth | |

90 | Ninety | 90th | Ninetieth | |

100 | One hundred | 100th | Hundredth | |

… | … | … | … | |

1000 | One thousand | 1000th | Thousandth |