It’s 29 past 4 (Official clock system).

16:29

It’s 29 past 4.

Correct answer

16:28

It’s 28 past 4.

Error: 1 minute earlier

16:05

It’s 5 past 4.

Error: read minutes starting from hour markings and adding minutes

18:20

It’s 20 past 6.

Error: confuse hour and minute hands