It’s 21 past 7 (Official clock system).

07:21

It’s 21 past 7.

Correct answer

07:22

It’s 22 past 7.

Error: 1 minute later

07:05

It’s 5 past 7.

Error: read minutes starting from hour markings and adding minutes

04:35

It’s 25 to 5.

Error: confuse hour and minute hands