It’s 3 past 6 (Official clock system).

18:03

It’s 3 past 6.

Correct answer

18:04

It’s 4 past 6.

Error: 1 minute later

18:15

It’s a quarter past 6.

Error: read minutes starting from hour markings and adding minutes

13:30

It’s half past 1.

Error: confuse hour and minute hands