quel âge avez-vous?
take a french class or write it down in french or kiss her or he
How old are you? = Quel âge avez-vous?
"How old are your twin daughters?" would be translated in French "quel âge ont tes jumelles ?"
ask one of her/his friend or ask one of your friend to ask her/him.
"Quel âge as-tu ?" (if you're talking to a friend) or "Quel âge avez-vous ?" (polite form).
a riba derchi lol
Vieil ami
you ask him.
Demandez à votre ami(e)
qu'est ce que tu fais
Quel age as tu?
To ask "How old is your brother?" in French, you can say "Quel âge a ton frère ?"