The question asks: If you know a person’s age, find the year in which that person was born.

To find the year of birth, you need to subtract the person's age from the current year.

• Let's assume the current year is $\text{Current Year}$, and the person’s age is $\text{Age}$.
• The year of birth is then calculated as:

$\text{Year of Birth} = \text{Current Year} - \text{Age}$

Therefore, the correct answer from the options provided is:

• C. Subtract the age of the person from the current year.

Would you like more details or have any questions?

Here are 5 relative questions to consider:

1. How would you calculate the age of a person if you know their year of birth?
2. What if the person hasn’t had their birthday yet this year? How does that affect the calculation?
3. Can this formula be applied universally across different calendar systems?
4. How would you handle cases where only the person's birth month and day are known?
5. Why does subtracting the age from the current year give the correct birth year?

Tip: Always check whether the person has already had their birthday this year when calculating their exact age!