7. ἐπηρώτησαν. The questioners were Peter and James and John and Andrew, Mar 13:3.
πότε … καὶ τί τὸ σημεῖον; Our Lord leaves the former question unanswered (see on Luk 17:20) and only deals with the latter. This was His gentle method of discouraging irrelevant or inadmissible questions (comp. Luk 13:23-24).