It’s 20 to 6 (Official clock system).

05:40

It’s 20 to 6.

Correct answer

06:20

It’s 20 past 6.

Error: mirror minute hand about the vertical axis

05:52

It’s 8 to 6.

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

08:05

It’s 5 past 8.

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