Formal:
* 어디에 사세요? (eodi-e saseyo?) - This is the most formal way to ask, suitable for someone you don't know well or someone older than you.
* 어디에 거주하십니까? (eodi-e geojoohasimnikka?) - This is even more formal than the previous option.
Informal:
* 어디 살아? (eodi sal-a?) - This is informal and used with friends or family.
* 어디 사니? (eodi sani?) - This is even more informal than the previous option.
Polite:
* 어디에 사세요? (eodi-e saseyo?) - This is also polite and can be used with anyone.
Remember to adjust your tone and language based on the context and your relationship with the person you are speaking to.