AP Style

Numbers

100

The name for the numbers that are used to indicate order (1st, 2nd, 3rd)

What is ordinal numbers

200

AP allows for this single exception when using figures at the start of a sentence. 

What is a year?

As in: 2020 was a terrible year. 

300

When considering rank order, AP allows for abbreviations for this word? 

What is number?

As in, Missouri football was ranked No. 16 in the college polls this week.

400

These types of numerals are used sparingly in AP Style, but are allowed for a legislative act or in sequencing. 

What is Roman numerals?

Example: World War II, King Charles III, Title IX

500

AP typically requires that you would use this word, not the symbol, when indicating temperatures below zero. 

What is minus?

Rule is to spell out not use the symbol: as in minus 10 degrees.