It’s 29 to 4 (Official clock system).

03:31

It’s 29 to 4.

Correct answer

03:30

It’s half past 3.

Error: 1 minute earlier

02:53

It’s 7 to 3.

Error: read minutes starting from hour markings and adding minutes

06:15

It’s a quarter past 6.

Error: confuse hour and minute hands