115 years old now in 2023 - what year born?


Today, 30 November 2023 if a person is 115 years old now, what year was he born? See below:


If 115 years old, year of birth is:
1907 or 1908*
*It depends on whether he was born before or after 1 January 1908.


If now 115 years and his year of birth 1907 if he was born after 30 November 1907 until 31 december 1907 inclusively, and his year of birth is 1908 if he was born from 1 January 1908 to 30 November 1908.


Other examples:

If now 10 years, year of birth 2012 or 2013
If now 12 years, year of birth 2010 or 2011
If now 24 years, year of birth 1998 or 1999
If now 93 years, year of birth 1929 or 1930

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