Der= Masculine Die= Feminine and Das= Neuter Instead of remembering a word like "Junge" or "Mädchen", get used to memorizing "Der Junge", and "Das Mädchen" while you're still learning the basics. I'm still a beginner but I'm having to re-learn all the nouns because I didn't take the time to remember that.
This question was to pronounce "Der Tee" using the microphone. Two attempts saying "derr" or "dair" elicited a "Try again". The 3rd time I pronounced "Der" like the female voice ("day-uh") and it accepted it. Duolingo using regional dialects, inconsistently, is problematic, IMO. Should we just go ahead and drop all "R" sounds. I mean, "dwop" them? Du fwist? Zuckah? Weally?
Basically no -- grammatical gender is essentially arbitrary.
(And not even consistent between languages that have grammatical gender. For example, German considers "sun" feminine but "moon" masculine, while French speakers would assign those nouns exactly the opposite genders.)
In general: you can't. You just have to look it up and memorise it.
(For example, what gender is Leiter? Answer: it can be either masculine or feminine, depending on the meaning -- die Leiter is "the ladder", der Leiter is "the leader". So you can't generally tell from the shape of the word what gender it will be.)
i don't know about you guys but i could not understand his pronunciation and i clicked the slow button like 30 times. each time it sounded like he said "dear tay" i assumed he was saying "der" so i got that part correct and wrote "te" since i couldn't tell what the last word was. it didn't occur to me he was saying "tee" until after i surprisingly got it right. (one letter off which is why i got it right...)