The answer can depend on when the answer is read. So here is a more general answer:
Age Now = Year Now - Year of Birth (if the person has had their birthday this year, and one less if they have not).
6 years old.
It actually depends. If my birthday is in October and I am 20 on April 24, 2009, then I was born in 1988. If my birthday is in January and I am 20 on April 24, 2009, then I was born in 1989. So your answer depends on what month the person is born in.
454 years old
They would be 35 years old.
Around 25 years old.
As of November 2011, someone born on April 12, 1982 will be 29 years old.
30 (2009-1979)
You would not be born yet... you wouldint be born because it is not April yet but if it was you would be 1 year old.
in 2009, 27.
2009 - 1941 = 68 on their birthday in 2009
As of March 2012, someone born in April 1945 would be 66 years old.
If you were born in April 14 1948 and today is mars 14 2009. you'd be 60 years 11 months old.