It’s 29 to 3 (Official clock system).

02:31

It’s 29 to 3.

Correct answer

02:30

It’s half past 2.

Error: 1 minute earlier

01:53

It’s 7 to 2.

Error: read minutes starting from hour markings and adding minutes

06:10

It’s 10 past 6.

Error: confuse hour and minute hands