It’s 21 past 11 (Official clock system).

11:21

It’s 21 past 11.

Correct answer

11:22

It’s 22 past 11.

Error: 1 minute later

11:05

It’s 5 past 11.

Error: read minutes starting from hour markings and adding minutes

04:55

It’s 5 to 5.

Error: confuse hour and minute hands