عمرهم عشر سنوات.
Explanation:
The Arabic phrase "عمرهم عشر سنوات" literally means "their age is ten years."
The word "عمرهم" (pronounced "om-rom") is a combination of the word "عمر" (pronounced "om-r"), meaning "age," and the third person plural possessive pronoun "هم" (pronounced "hom").
The word "عشر" (pronounced "ash-r") means "ten."
The word "سنوات" (pronounced "san-a-wat") is the plural of the word "سنة" (pronounced "san-ah"), meaning "year."
Therefore, the complete sentence translates to "Their age is ten years."
Additional notes:
The Arabic phrase "عمرهم عشر سنوات" is grammatically correct.
The Arabic phrase "عمرهم عشر سنوات" is idiomatic and natural-sounding.
The Arabic phrase "عمرهم عشر سنوات" is appropriate for the context of the question.
I hope this answers your question.