It’s 27 to 5 (Alternative clock system).

04:33

It’s 27 to 5.

Correct answer

04:32

It’s 28 to 5.

Error: 1 minute earlier

03:51

It’s 9 to 4.

Error: read minutes starting from hour markings and adding minutes

07:20

It’s 20 past 7.

Error: confuse hour and minute hands