Who's that?
Brother
Who are they?
Tey are sisters/ twins.
How old is your sister?
How old is he?
13
What number is it?
How old is she?
15
Who's this?
Father
Who's that?
Mother
How old is your brother?
18
How old is she?
12
Who's this?
Sister
What number is it?
11
What number is it?
20