When it comes to numbers, we all want to make sure that we are using the correct form. The 51st or 51th dilemma is one that often confuses English learners. So, let’s get straight to the point – the correct form is 51st.
Using “st” to indicate the ordinal number is a common practice in English. For numbers ending in one, two, three, or any other number that doesn’t end in one or two (except for 11 and 12), we add “th” to the number. However, when the number ends in one, we write “st” instead of “th.” Let’s break it down with some examples to make it crystal clear.
1. The 1st book on the shelf is mine.
2. The 2nd and 3rd books are Harry Potter and the Chamber of Secrets and Prisoner of Azkaban.
3. The 4th, 5th, and 6th books are part of the Lord of the Rings trilogy.
4. The 11th chapter of the book is the most thrilling.
5. The 12th and 13th chapters are also quite exciting.
Notice how we write “1st,” “2nd,” “3rd,” “4th,” “5th,” “6th,” “11th,” and “12th.” These are all correct forms because we are following the rule we discussed earlier.
Now, let’s examine why “51th” or “51nd” would be incorrect. The numbers ending in one or two exceptions apply only to the numbers ending in one and two themselves, such as “21st,” “31st,” “42nd,” or “52nd.” They do not apply to other numbers, such as “51.” We always use “st” with “1,” “2,” “3,” and so on.
Here are some examples to illustrate this point:
1. The 21st century has seen great technological advancements.
2. On the 31st of October, we celebrate Halloween.
3. Peter is in the 42nd position in the race.
4. Her birthday is on the 52nd day of the year.
In each of these examples, we can see that the correct ordinal forms are used – “21st,” “31st,” “42nd,” and “52nd.” It’s clear that we only use “st” with numbers ending in one, and “nd” with numbers ending in two.
To summarize, the correct form to express the ordinal number for 51 is “51st.” The use of “51th” or “51nd” is incorrect. And remember, this rule applies to all other numbers as well – always use “st” with numbers ending in one, and “nd,” “rd,” or “th” with numbers ending in two, three, four, and so on.
So, next time you are faced with the decision of whether to use “51st” or “51th,” you can confidently choose “51st” and know that you are using the correct form. Happy learning!