It’s 18 to 12 (Official clock system).

11:42

It’s 18 to 12.

Correct answer

11:41

It’s 19 to 12.

Error: 1 minute earlier

10:50

It’s 10 to 11.

Error: read minutes starting from hour markings and adding minutes

08:55

It’s 5 to 9.

Error: confuse hour and minute hands