It’s 27 past 4 (Alternative clock system).

16:27

It’s 27 past 4.

Correct answer

16:28

It’s 28 past 4.

Error: 1 minute later

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