"There are not ninety-two kindergarten teachers flying among the airplanes, but eighty-four."
Translation:Nem kilencvenkilenc óvónő repül a repülőgépek között, hanem nyolcvannégy.
If ninety-two is translated: kilencvenkilenc then duolingo should be changed to ninolingo. kilencvenketto was rejected by the way.
Yes, it's a mistake. Thanks for reporting it. Hopefully it will be fixed eventually.