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"5 day old" vs "5 days old"

Both "5 day old" and "5 days old" are not correct. The correct phrase is "5 days old" when referring to the age of something or someone. The word "days" should be plural to match the number 5.

Last Updated: March 15, 2024

5 day old

This phrase is incorrect. The word "day" should be pluralized to match the number 5.

Incorrect. The correct form is "5 days old" when referring to the age of something or someone.

5 days old

This phrase is correct when referring to the age of something or someone. The word "days" should be plural to match the number 5.

Correct usage when indicating the age of something or someone. Always use the plural form "days" with a number like 5.

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