143 years old now in 2021 - what year born?


Today, 17 May 2021 if a person is 143 years old now, what year was he born? See below:


If 143 years old, year of birth is:
1877 or 1878*
*It depends on whether he was born before or after 1 January 1878.


If now 143 years and his year of birth 1877 if he was born after 17 May 1877 until 31 december 1877 inclusively, and his year of birth is 1878 if he was born from 1 January 1878 to 17 May 1878.


Other examples:

If now 6 years, year of birth 2014 or 2015
If now 16 years, year of birth 2004 or 2005
If now 29 years, year of birth 1991 or 1992
If now 97 years, year of birth 1923 or 1924

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