2011 - 21 = 1990
If you are 21 years old, you were born in 1990. (2011)
1989
1988
Take 21 from the current year if you have had your birthday, if you have yet to have your birthday in the current year take away 22
1996 + 21 = 2017
If you were 21 you would be born in 1987.
If you are 21 in 2013, then you were born in 1992.
People turning 21 in 2018 were born in 1997.
1990
2998
2011 - 21 = 1990
2015 − 1994 = 21 Therefore, you would have been born in1994
If you are 21 years old, you were born in 1990. (2011)
1993
1988
1989