It’s 10 to 5 (Official clock system).

04:50

It’s 10 to 5.

Correct answer

05:10

It’s 10 past 5.

Error: mirror minute hand about the vertical axis

10:04

It’s 4 past 10.

Error: confuse hour and minute hands and read as hours with ‘past’ or ‘to’

10:20

It’s 20 past 10.

Error: confuse hour and minute hands