It’s 27 past 11 (Official clock system).

23:27

It’s 27 past 11.

Correct answer

23:28

It’s 28 past 11.

Error: 1 minute later

23:07

It’s 7 past 11.

Error: read minutes starting from hour markings and adding minutes

17:55

It’s 5 to 6.

Error: confuse hour and minute hands