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

09:50

It’s 10 to 10.

Correct answer

10:10

It’s 10 past 10.

Error: mirror minute hand about the vertical axis

10:51

It’s 9 to 11.

Error: confuse hour and minute hands and read as hours with ‘past’ or ‘to’

10:45

It’s a quarter to 11.

Error: confuse hour and minute hands