My point is, if you have studied the map ( not meaning in advance of a quiz, just, that you know the countries of the globe you live on) There are quite a few geography quizzes that become rather easy. And the of these you take the easier it gets.
Like some people might still be unsure about the _stans locations, but noone on here would mix up brazil with chile for instance.
(It allmost seems you took an atlas an looked at the countries in the southern hemisphere and thought all should be on this quiz, but overlooked the islands or something..)
Brazil: 7,887,350 km2
DRC: 1,620,885 km2
Indonesia: 1,408,742 km2