After a secondary tense the mood of a direct question may be retained (usually for vividness) in the same sentence with the mood of an indirect question (cp. cross2632). Thus,
ὁμοῖοι ἦσαν θαυμάζειν ὅποι ποτὲ τρέψονται οἱ Ἕλληνες καὶ τί ἐν νῷ ἔχοιεν
ἤρετο ὅ τι θαυμάζοι καὶ ὁπόσοι αὐτῶν τεθνᾶσιν
a. In some cases there is no apparent reason (apart from desire for variety) for this use of the indicative and optative in the same sentence. Sometimes the indicative may ask for a statement of fact, the optative request an opinion of the person questioned.
Herbert Weir Smyth [n.d.], A Greek Grammar for Colleges; Machine readable text [info] [word count] [Smyth].