Except for a few basic rules, spelling out numbers vs. using figures (also called numerals) is largely a matter of writers' preference. Again, consistency is the key. Policies and philosophies vary from medium to medium. America's two most influential style and usage guides have different approaches: The Associated Press Stylebook recommends.
In this lesson, we will explore three very small but important words in the English language: the articles a, an and the. These are words that you use in almost every sentence that you speak or write.