It’s 1 to 11 (Official clock system).

10:59

It’s 1 to 11.

Correct answer

11:00

It’s 11 o’clock.

Error: 1 minute later

09:49

It’s 11 to 10.

Error: read minutes starting from hour markings and adding minutes

12:50

It’s 10 to 1.

Error: confuse hour and minute hands