It’s 17 to 3 (Official clock system).

02:43

It’s 17 to 3.

Correct answer

02:42

It’s 18 to 3.

Error: 1 minute earlier

01:49

It’s 11 to 2.

Error: read minutes starting from hour markings and adding minutes

09:10

It’s 10 past 9.

Error: confuse hour and minute hands