It’s 13 past 4 (Official clock system).

16:13

It’s 13 past 4.

Correct answer

16:12

It’s 12 past 4.

Error: 1 minute earlier

16:05

It’s 5 past 4.

Error: read minutes starting from hour markings and adding minutes

15:20

It’s 20 past 3.

Error: confuse hour and minute hands