Breakdown of В этом гардеробе не осталось ни одного номерка.
не
not
этот
this [f: эта, n: это]
в
in / to (direction)
остаться
to stay
Questions & Answers about В этом гардеробе не осталось ни одного номерка.
Why are ни одного and номерка in the genitive case?
Expressing the complete absence of something requires the genitive case (often called the genitive of negation). Here, the emphatic ни один (not a single) stresses this total absence, so both the pronoun and the noun must take the masculine genitive form: ни одного номерка.
Why is the verb осталось in the neuter singular form if номерок is a masculine noun?
Because the noun is in the genitive case, the sentence has no grammatical subject in the nominative case. When a sentence describes the absence or lack of something using the genitive of negation, the past tense verb always defaults to the impersonal neuter singular form (осталось).
Since we have ни одного, could we drop the не before the verb?
No, Russian strictly requires double negation. Whenever you use an emphatic negative phrase starting with ни (like ни один), you must still include the standard negative particle не right before the verb.
What exactly is a номерок in this context?
Номерок is the diminutive form of номер (number). In the context of a гардероб (cloakroom or wardrobe), it specifically refers to the small numbered tag or token you are given when you check in your coat.