The numbers that are used for counting are called cardinal numbers. It means all the natural numbers come in this category. So focus on this lesson because it is very important.

## What are the cardinal numbers?

Cardinal numbers are numbers that are used for counting. They are also known as natural numbers, cardinals or Basic numbers are counting numbers.

The numbers we use for counting are called the original numbers. We answer with regular numbers the question "How many".

For example, how many students are going to the school picnic? The answer could be any number like 20, 23, 30, etc. So, all these numbers come in the category of cardinal numbers.

The cardinal numbers are the counting numbers that start from (one, two, three, etc.) are adjectives that refer to quantity. and goes on sequentially and are not fractions. Examples:

- There are twenty-five people in the room.
- I have asked you twenty times to be quiet.

Other than most ordinal numbers (They are the first, second, third, fourth, fifth, sixth, and so on). Examples:

- 1st: First
- 2nd: Second
- 3rd: Third
- 4th: Fourth
- 5th: Fifth
- 6th: Sixth
- 7th: Seventh
- 8th: Eighth
- 9th: Ninth
- 10th: Tenth

## Examples of cardinal numbers

Here is the list of cardinal numbers from 1 to billion written in English:

Arabic numeral | Cardinal numbers |
---|---|

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 |

30 | thirty |

31 | thirty-one |

40 | forty |

41 | forty-one |

50 | fifty |

51 | fifty-one |

60 | sixty |

61 | sixty-one |

70 | seventy |

71 | seventy-one |

80 | eighty |

81 | eighty-one |

90 | ninety |

91 | ninety-one |

100 | one Hundred |

101 | one Hundred one |

151 | one hundred and fifty-one |

200 | two Hundred |

201 | two Hundred one |

251 | two hundred and fifty-one |

1,000 | one thousand |

1,001 | one thousand one |

1,501 | one thousand five hundred one |

100,000 | one hundred thousand |

100,001 | one hundred thousand one |

100,501 | one hundred thousand five hundred one |

1,000,000 | one million |

1,000,500 | one million five hundred |

1,000,000,000 | one billion |

If you do not find the cardinal number you are looking for, you can write in google search the number followed with the word "**in word**":

**References**