Question

If my year is 13 then after 3 years what is my age

Answer 1

If now you are 13 years old, and you already had a birthday this year, then in three years you will be 13 + 3 = 16 years.

If you are 13 now, but your birthday will be this year and you will be 14, then in three years you will be 14 + 3 = 17 years old