It’s 23 past 4 (Official clock system).

16:23

It’s 23 past 4.

Correct answer

16:22

It’s 22 past 4.

Error: 1 minute earlier

16:07

It’s 7 past 4.

Error: read minutes starting from hour markings and adding minutes

17:20

It’s 20 past 5.

Error: confuse hour and minute hands