It’s 10 to 11 (Official clock system).

10:50

It’s 10 to 11.

Correct answer

11:10

It’s 10 past 11.

Error: mirror minute hand about the vertical axis

10:00

It’s 10 o’clock.

Error: confuse hour and minute hands and read as full hour

09:50

It’s 10 to 10.

Error: confuse hour and minute hands and read as nearest hour