哪nǎ儿ér
where
Used to ask about location. '哪里' (nǎlǐ) is an alternative form with the same meaning.
❓ Interrogative Pronoun 🌱 HSK 1
⭐ Learned at Level 7
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哪兒
Traditional

Contains the following characters:

哪nǎ

which

External Resources:

MDBG Dictionary
Wiktionary