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21st Mortgage Corporation is a full service lender specializing in manufactured and mobile home loans. We originate and service a variety of loans to borrowers from manufactured home retailers, mortgage brokers and directly to consumers all over the USA.
“21st” is the correct form to indicate the ordinal number between 20th and 22nd. “21th” is an irregular ordinal number, because it ends with 1. The number one, as an ordinal number, is “First” – and the suffix used to indicate that is “-st”. That’s why we use “1st”, “21st”, “31st”, etc.
Ordinal numbers show the exact day of the month. My birthday is on the 10th of July. We met on the 21st of March. 2. Floors in a Building. They describe which level or floor someone is on.
The correct form is 21st, not 21th. This rule applies because ordinal numbers in English require specific suffixes based on the last digit of the number. For example, numbers ending in 1 use ‘st’, those ending in 2 use ‘nd’, and those ending in 3 use ‘rd’. Other numbers use ‘th’.
If you are in a hurry, I have a quick answer for you. Here it is: '21th' is a grammatical error. '21st' is the correct numeric abbreviation of twenty-first. If you have time to stick around, this lesson will help you write numbers confidently. So, keep reading!
