It’s 17 past 11 (Official clock system).

23:17

It’s 17 past 11.

Correct answer

23:18

It’s 18 past 11.

Error: 1 minute later

23:05

It’s 5 past 11.

Error: read minutes starting from hour markings and adding minutes

15:55

It’s 5 to 4.

Error: confuse hour and minute hands