This is the 408th most frequent Afrikaans word.
sommige
"Some" or "certain."
The word 'sommige' is used here as an adjective to mean 'some', referring to a portion of the people.
Sommige mense hou van koffie.
Some people like coffee.
The word 'sommige' is used as an adjective to specify a subset of the books, implying partial completion.
Ek het sommige boeke gelees, maar nie almal nie.
I read some books, but not all.
'Sommige' functions as an adjective modifying 'vrae', indicating not all, but a specific subset that presented difficulty.