Question
Does not the singular or plural form of a verb in Spanish correspond with the primary noun of the subject?
The primary noun in the subject "El número de figuras" is "el número" which is singular. However the corresponding form of the verb "entrar" is plural "entran". Why is this? If it is "Los números de figuras que entran" it sounds find to me. If someone can explain the logic behind, it would be appreciated.
Sentence
«El número de figuras que entran en un compás entero de Compasillo es de una redonda o dos blancas o cuatro negras u ocho corcheas o dieciséis semicorcheas».