It’s 20 past 5 (Official clock system).

05:20

It’s 20 past 5.

Correct answer

04:40

It’s 20 to 5.

Error: mirror minute hand about the vertical axis

05:04

It’s 4 past 5.

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

04:05

It’s 5 past 4.

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