It’s 12 to 8 (Alternative clock system).

19:48

It’s 12 to 8.

Correct answer

19:49

It’s 11 to 8.

Error: 1 minute later

18:48

It’s 12 to 7.

Error: read minutes starting from hour markings and adding minutes

22:35

It’s 25 to 11.

Error: confuse hour and minute hands