You would celebrate your 77th birthday !
It is 2013, so you were born in 1936.
77 if they've had their birthday.
2016 − 1936 = 80 years old
76
In 2009 you would be 73 years old.
2009 - 1936 = 73
You would be 73, 74 in September.
2013 - 1990 = 23 If you were born in 1990, you would be 23 in 2013.
You would be 73 or 74 depending on when the birthday is.
Someone born in 1932 would be 81 years old in 2013.
As of your birthday in 2013, you would be 16 years old.
On your birthday in 2013, you would be 17 years old.