It’s 21 past 5 (Official clock system).

05:21

It’s 21 past 5.

Correct answer

05:22

It’s 22 past 5.

Error: 1 minute later

05:05

It’s 5 past 5.

Error: read minutes starting from hour markings and adding minutes

04:25

It’s 25 past 4.

Error: confuse hour and minute hands