# What is the ordinal number?

May 29, 2018

An ordinal number is an adjective derived from a number that describes an object's position in a sequence.

#### Explanation:

(see here for more detail)

With some exceptions (listed below), ordinal numbers are created by adding -th to the end of a cardinal number (ordinary numbers). For example:
seven $\rightarrow$ seventh
six $\rightarrow$ sixth

In context: There are ten cards numbered in order. This one has the number 'six' on it. It is the sixth.

Irregular ordinal numbers:
one $\rightarrow$ first
two $\rightarrow$ second
three $\rightarrow$ third
five $\rightarrow$ fifth
eight $\rightarrow$ eigth
nine $\rightarrow$ ninth
twelve $\rightarrow$ twelfth