No. 11,339 in Russian
десятой
The word "десятой" is the feminine or instrumental form of "десятый," meaning "tenth" in English.
In a sentence
На десятой странице книги найдётся ответ.
On the tenth page of the book, there is an answer.
In this sentence, the word "десятой" is used as an ordinal numeral modifying "странице" (page), indicating its sequential order.
На десерте осталась лишь десятой торта.
Only a tenth of the cake was left on the dessert.
Here, "десятой" is used as a fractional numeral to indicate a part (a tenth) of the cake.
Десятой темы не будет на экзамене.
The tenth topic will not be on the exam.
In this example, "десятой" modifies "темы" (topic), specifying that a particular numbered topic is being discussed.
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