Usages of setka
Na stole leżało jakieś pół setki starych gazet.
There were some fifty old newspapers lying on the table.
W parku było jakieś pół setki gości, najwyraźniej na urodzinach.
There were some fifty guests in the park, evidently for a birthday.
Elon.io is an online learning platform
We have an entire course teaching Polish grammar and vocabulary.