Which of the following sentences is grammatically correct?

Understanding Spanish Question Structures

¿Cuánta cuesta la entrada?

The first sentence is incorrect. In Spanish, "cuánta" is used for feminine nouns, such as "entradas" (tickets). However, "cuesta" is a singular verb used for a singular masculine noun, so it should be "cuánto" instead. The correct form would be "¿Cuánto cuesta la entrada?"

¿Cuántos cuesta la entrada?

The second sentence is also incorrect. In Spanish, "cuántos" is used for plural masculine nouns, so it should be paired with the correct form of the verb "cuestan." The correct form would be "¿Cuánto cuestan las entradas?"

¿Cuánto cuesta la entrada? (¿Cuánto cuesta la entrada?)

The fourth sentence is grammatically correct. In this sentence, "cuánto" is the correct form to use with the singular verb "cuesta." The repetition is unnecessary, but it does not affect the grammatical correctness of the sentence.

Which sentence is grammatically correct?

The grammatically correct sentence is: "¿Cuánto cuesta la entrada? (¿Cuánto cuesta la entrada?)"