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

10:10

It’s 10 past 10.

Correct answer

09:50

It’s 10 to 10.

Error: mirror minute hand about the vertical axis

10:02

It’s 2 past 10.

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

02:50

It’s 10 to 3.

Error: confuse hour and minute hands