What's the difference between 'unas' and 'unos'?

Unos means 'some' or 'a few' and is masculine.

Unas means 'some' or 'a few' and is feminine.

For example:

Hay unos niños en ese parque = There are some kids in that park

Niños is masculine so you use unos.

Dime unas palabras en inglés = Tell me some words in English

Palabras is feminine so you use unas.

Hope this helps :) It's not very hard once you practise a few times.

translated the questions are:

do you need that cup?

need to use these napkins?

do you prefer this apple pie or that flan?

would you like more?

do you prefer this chocolate ice cream or that vanilla ice cream?

1. no necesito eso taza

2. sí tengo esas servilletas

3. prefiero esta tarta de manzana

4.   i'm not sure

5.prefiero este helado de chocolate

also if you need later on i used to use this website:       plz let me know if im wrong: )