human
Jack is 6 years old. His sister Judy is 3 times younger than him. How old will be Judy, when Jack will be 66 years old?
gpt
Alright, let's work this out step by step. 

1. Jack is currently 6 years old.
2. Judy is currently 6/3=2 years old. 
3. Therefore, Jack is 4 years older than Judy. 
4. When Jack is 66 years old, Judy will be 66-4=62 years old. 
5. Therefore, the correct answer should be "Judy will be 62 years old".