It’s 9 to 12 (Official clock system).

11:51

It’s 9 to 12.

Correct answer

11:50

It’s 10 to 12.

Error: 1 minute earlier

10:49

It’s 11 to 11.

Error: read minutes starting from hour markings and adding minutes

10:55

It’s 5 to 11.

Error: confuse hour and minute hands