How Old Am I?

Riddle: When my father was 31 I was 8. Now he is twice as old as me. How old am I?

Answer: The difference in age is 23 years, so I must be 23 if my father is twice as old as me.

Source: https://www.riddles.com/index.php/2264

When my father was 31 I was 8. Now he is twice as old as me. How old am I? — How Old Am I? by Morgan Foster v1.

Riddle: When my father was 31 I was 8. Now he is twice as old as me. How old am I? Answer: The difference in age is 23 years, so I must be 23 if my father is twice as old as me. — by Morgan Foster v2.