berapa banyak negara di benua amerika should be accepted though
I wrote "Berapa banyak negara ada di benua Amerika" and it was not accepted. Is this not a proper construct, or should it also be accepted?
"Banyak" here is superfluous ("berapa" means "how much/many" already).
Benua doesn't necessarily require capitalization.
Negara negara is wrong....?
How about "Berapa negara yang ada di benua Amerika?"