It’s 11 o’clock (Alternative clock system).

23:00

It’s 11 o’clock.

Correct answer

22:00

It’s 10 o’clock.

Error: 1 hour earlier

12:00

It’s 12 o’clock.

Error: 1 hour later

17:00

It’s 5 o’clock.

Error: read hour hand as if it were in the opposite position