If you were born in 1990, then you'll turn 23 on your birthday in 2013.
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Currently we are in year 2014. Then you will be 24 years old on celebrating your birthday of year 2014
If you were born in 1990, then you will turn 23 on your brithday in 2013.
To determine your age from 1990 to 2013, you would subtract your birth year from the current year. For example, in 1990, you would be your birth year age. In 2013, you would be your birth year age plus 23. So, for each year between 1990 and 2013, you would increment your age by one year.
You will turn 23 in 2013.
1990
1990
The year of birth would have been 1990.
You would be born in 1969.
Given that the year you're looking at is 2010, if you were 20, you would be born in 1990.
You would have been born in 1990.
If you are 21 in 2013, then you were born in 1992.
You would be 27 this year.
You would be born in 1950.