It’s a quarter to 11 (Official clock system).

10:45

It’s a quarter to 11.

Correct answer

11:15

It’s a quarter past 11.

Error: mirror minute hand about the vertical axis

10:51

It’s 9 to 11.

Error: read minutes as hours with ‘past’ or ‘to’

09:45

It’s a quarter to 10.

Error: quarter to 10