"They look smart."

Translation: Ele arată deștepte.

[IrmaWalter]

How am I supposed to know that it is plural feminin?

[Mapka15]

You don't know, but "Ei arată deștepți" is also accepted :)

[woozlification]

Is that smart as in clever, or as in well-dressed?

[LouisSepdekdu]

If I translate correctly dexonline's definition, deștepte means "which understands easily and precisely what he reads, hears, sees; quick-witted, intelligent".

[woozlification]

Thank you :-)

[PerezMaicol]

why no!? ei urata destepti

[potestasity]

It should be accepted, report it. (unless it was rejected because of the typo)

[LouisSepdekdu]

Is "ei arată isteți" correct?

[Pepi.V.]

In English THEY is used for feminine and masculine, you shoud accept my answer.

[LouisSepdekdu]

According to Mapta15, "Ei arată deștepți" is accepted. Maybe what you wrote was refused for some other reason.