What year should a person born to be 17 years old?

Answer 1

17 years before the year the question is asked.

Example:

Person in 2011: "What year should a person be born to be 17 years old?"

---> 2011 minus 17 equals 1994/// 2011-17=1994

So a person born in 1994 would be 17 years old in 2011.

Birthdays near the end of a year however may throw off the formula. For example, if someone is born in December 1993, they would also be 17 years old in 2011.

So the easiest way to find out which year would be to simply ask someone when they were born.

Answer 2

2010-17

= 1993