What is a suffix for number?

There isn't one specific suffix that universally applies to all numbers. However, there are several suffixes used depending on the context and type of number:

For ordinal numbers:

* -th: This is the most common suffix for ordinal numbers, used for numbers greater than three (e.g., fifth, tenth, hundredth).

* -st: Used for first and numbers ending in one (e.g., first, twenty-first).

* -nd: Used for second and numbers ending in two (e.g., second, twenty-second).

* -rd: Used for third and numbers ending in three (e.g., third, twenty-third).

For other types of numbers:

* -fold: Used to indicate a multiple of something (e.g., threefold, tenfold).

* -ary: Indicates a number system (e.g., binary, ternary, quaternary).

* -gon: Used for polygons based on the number of sides (e.g., hexagon, pentagon).

Note: The suffixes -th, -st, -nd, and -rd are primarily used in English. Other languages may have different suffixes for ordinal numbers.