115 years old now in 2022 - what year born?


Today, 5 December 2022 if a person is 115 years old now, what year was he born? See below:


If 115 years old, year of birth is:
1906 or 1907*
*It depends on whether he was born before or after 1 January 1907.


If now 115 years and his year of birth 1906 if he was born after 5 December 1906 until 31 december 1906 inclusively, and his year of birth is 1907 if he was born from 1 January 1907 to 5 December 1907.


Other examples:

If now 3 years, year of birth 2018 or 2019
If now 16 years, year of birth 2005 or 2006
If now 21 years, year of birth 2000 or 2001
If now 96 years, year of birth 1925 or 1926

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