どれか

noun

which one

Used to ask for a specific choice among several options. Often appears in questions or embedded clauses.

• どれか好すきなものを選えらんでください。

  Please choose whichever one you like.

• どれかが正せい解かいです。

  One of them is the correct answer.

noun

one of; any of

Refers to an unspecified item from a group, often in statements rather than direct questions. Can imply 'any one will do'.

• どれか一ひとつでいいから貸かして。

  Lend me any one of them, please.

• どれかが当あたりです。

  One of them is a winner.