неких

In a sentence

• Ја сам позван на неких петнаест минута.

  I was invited for some fifteen minutes.

  Here, 'неких' is used as a quantifier to express an approximate amount or quantity.

• Видео сам неких интересантних људи на забави.

  I saw some interesting people at the party.

  Here, 'неких' is used to imply the presence of certain unspecified individuals.

• Узела је неких неколико јабука са стола.

  She took some apples from the table.

  Here, 'неких' suggests an unspecific and minor quantity of the mentioned items.