singular nouns (definite)
singular nouns (indefinite)
plural nouns (definite)
plural nouns (indefinite)
exceptions
100

what is the girl 

la chica

100

what is the girl in indefinite

una chica

100

what is the teachers

las profesoras

100

what are the teachers in indefinite

unas profesoras

100
exception for masculine (definite)

el dia

200

what is the boy

el chico

200

what is the boy in indefinite

un chico

200

what is the tourists

las turista

200

what is the tourists in indefinite 

unas turista

200

exception for feminine (definite)

la mano

300

what is the notebook

la cuaderno

300

what is the notebook in indefinite

una cuaderno

300

what is the students

Los Estudiante

300

what are the students in indefinite

unos estudiantes

300

exception for masculine (indefinite)

un dia

400

what is the bus

el autobus

400

what is the bus in indefinite

un autobus

400

what is the pencils

Los lapices

400

what is the pencils in indefinite

unos lapices

400

exception for feminine (indefinite)

una mano

500

what is the suitcase

el maleta

500

what is the suitcase in indefinite 

un maleta