It’s 11 to 7 (Official clock system).

06:49

It’s 11 to 7.

Correct answer

06:50

It’s 10 to 7.

Error: 1 minute later

05:51

It’s 9 to 6.

Error: read minutes starting from hour markings and adding minutes

10:30

It’s half past 10.

Error: confuse hour and minute hands