Indefinite pronouns of subset (quelques-uns, quelques-unes)

To say "a few" or "a few of them" about a group you've already mentioned, use quelques-uns (masculine) or quelques-unes (feminine). They must agree with the gender of the noun they replace.

Feminine: Quelques-unes

Use quelques-unes to replace a feminine plural noun like les truffes (the truffles).

I would like some truffles, please.
Je voudrais des truffes, s'il vous plaît.
A few of them are melting.
Quelques-unes sont fondantes.

Masculine: Quelques-uns

Use quelques-uns for a masculine plural noun like les chocolats (the chocolates).

Here are the chocolates. A few of them have caramel.
Voici les chocolats. Quelques-uns ont du caramel.

Placement

While often used as the subject of a sentence, these pronouns can also appear at the end of a thought to clarify a quantity.

I bought some truffles, just a few of them.
J'ai acheté des truffes, juste quelques-unes.