It’s 20 to 3 (Official clock system).

02:40

It’s 20 to 3.

Correct answer

03:20

It’s 20 past 3.

Error: mirror minute hand about the vertical axis

02:52

It’s 8 to 3.

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

08:10

It’s 10 past 8.

Error: confuse hour and minute hands