the richest...

English as a Second Language English Vocabulary, Grammar and Idioms
1

Which are correct:

[color=red]1-Who earns the most money, the Swiss, the Norwegieans or the Belgians?
[color=indigo]2-Who earns most money, the Swiss, the Norwegieans or the Belgians?

[color=red]3-Who is the richest, the Swiss, the Norwegieans or the Belgians?
[color=indigo]4-Who is richest, the Swiss, the Norwegieans or the Belgians?

[color=red]3-Who works hardest, the Swiss, the Norwegieans or the Belgians?
[color=indigo]4-Who works hardest, the Swiss, the Norwegieans or the Belgians?

Gratefully,
Navi.

2

All are possible. I assume you intended to include an article in the last red sentence.

3

Thank you very much Beeeneees.
I apologize for the mistake. Indeed, there had to be an article there.

Respectfully,
Navi.