why not "Which are the colors"?
that should also be accepted!
It is accepted, and it more logical. "What are the colours.. has a different meaning than "Which are the colours..." I hope this translation is changed in the new tree.
I wrote "What are the colours of the nations flag".
I was not accepted.
I think it should be.
Is there a rule where 'Quais' and 'Qual' used in different situations or are they always interchangable?
Qual is singular: qual é o seu nome?
Quais is plural: quais são os seus planos para o futuro?
I wrote "What are the flag's national colors"? It was marked wrong.
As it should be. "What are the national flag's colors?" would be correct.