"Tengo unas preguntas para la maestra."
Translation:I have some questions for the teacher.
If the plural of mouse is mice, shouldn't the pluaral of house be hice?
"I have questions for the teacher" should be considered correct. The translation of "I have some questions..." Is Tengo algunas preguntas..."
If noun is problemas then yes unos, but my piece had preguntas which is feminine so unas is correct