It’s 28 past 9 (Alternative clock system).

21:28

It’s 28 past 9.

Correct answer

21:29

It’s 29 past 9.

Error: 1 minute later

21:08

It’s 8 past 9.

Error: read minutes starting from hour markings and adding minutes

18:45

It’s a quarter to 7.

Error: confuse hour and minute hands