Even though 11th, 12th, and 13th end in 1, 2, and 3, they still take “th” because of their special spelling and pronunciation: 11th, 12th, 13th (not 11st, 12nd, or 13rd)
The correct form is 11th, not 11st. This rule applies because ordinal numbers in English always end with the last two letters of the word written out fully. For example, “first” ends in “st,” “second” ends in “nd,” “third” ends in “rd,” and “ fourth ” ends in “th.”
When it comes to the ordinal number for “11,” there is often confusion between “11th” and “11st.” In this article, we will explore which form is correct and why. To put it bluntly, the correct ordinal number for “11” is “11th.” The use of “11st” is incorrect and considered grammatically wrong.
Correct spelling, explanation: this ordinal number should be written as 11th because they don’t pronounce it with first at the end (which would then indicate -st suffix), but we pronounce it eleventh, so with -th at the end.
11th or eleventh is the ordinal version of the cardinal number 11. Now that you know how to spell 11th, you may also be interested to know that 11 is spelled eleven.
What is correct 11th or 11st? LIST (11, 12, 13) defines the list of numbers that are exception to the ordinal naming rules (e.g., 11 is 11th, not 11st; 12 is 12th, not 12nd).
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