Formal:
* Kedu ka i mere? (This is the most common and formal way to ask "how are you?")
* Ngọzi ochie? (This literally means "old blessings," but it is a polite way to ask "how are you?")
Informal:
* Kedu ka i dinu? (This is a more casual way to say "how are you?")
* Kedu ka i nọ? (This is a very informal way to say "how are you?")
Other options:
* Ngọzi ochie? (This is a polite way to ask "how are you," especially to an elder.)
* Olee otú i si? (This literally means "how are you doing?" but it is a polite way to ask "how are you.")
The best way to choose the right phrase depends on the situation and your relationship with the person you are speaking to.