It’s 18 to 3 (Official clock system).

02:42

It’s 18 to 3.

Correct answer

02:41

It’s 19 to 3.

Error: 1 minute earlier

01:50

It’s 10 to 2.

Error: read minutes starting from hour markings and adding minutes

08:10

It’s 10 past 8.

Error: confuse hour and minute hands