9 years old now in 2025 - what year born?


Today, 11 February 2025 if a person is 9 years old now, what year was he born? See below:


If 9 years old, year of birth is:
2015 or 2016*
*It depends on whether he was born before or after 1 January 2016.


If now 9 years and his year of birth 2015 if he was born after 11 February 2015 until 31 december 2015 inclusively, and his year of birth is 2016 if he was born from 1 January 2016 to 11 February 2016.


Other examples:

If now 9 years, year of birth 2015 or 2016
If now 16 years, year of birth 2008 or 2009
If now 27 years, year of birth 1997 or 1998
If now 76 years, year of birth 1948 or 1949

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