143 years old now in 2020 - what year born?


Today, 19 September 2020 if a person is 143 years old now, what year was he born? See below:


If 143 years old, year of birth is:
1876 or 1877*
*It depends on whether he was born before or after 1 January 1877.


If now 143 years and his year of birth 1876 if he was born after 19 September 1876 until 31 december 1876 inclusively, and his year of birth is 1877 if he was born from 1 January 1877 to 19 September 1877.


Other examples:

If now 5 years, year of birth 2014 or 2015
If now 12 years, year of birth 2007 or 2008
If now 18 years, year of birth 2001 or 2002
If now 76 years, year of birth 1943 or 1944

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