It’s 18 to 1 (Official clock system).

00:42

It’s 18 to 1.

Correct answer

00:43

It’s 17 to 1.

Error: 1 minute later

11:50

It’s 10 to 12.

Error: read minutes starting from hour markings and adding minutes

08:00

It’s 8 o’clock.

Error: confuse hour and minute hands