It’s a quarter past 10.

10:15

It’s a quarter past 10.

Error: read digital clock as if it were an analogue clock

10:15

It’s a quarter past 10.

Error: read quarter as a number

09:45

It’s a quarter to 10.

Error: confuse ‘past’ and ‘to’

09:45

It’s a quarter to 10.

Error: confuse ‘past’ and ‘to’ and read quarter as number