1. Typically on JetPunk, we go by citypopulation.de as a source for population figures, not Wikipedia (which among other things is notorious for having inconsistent and different numbers on different pages).
2. Even leaving that aside, the numbers you have don't seem to match up with the source at all. Kinshasa should absolutely be up near the top of the Africa list. Your source lists it as 12.7 million. I'm not sure how to reconcile it with your "Urban area not included" caveat as it is not always clear whether entries in that source include urban areas or not. In the case of Kinshasa it might, but even if you just go by the "24 communes" (closest one can get to a city proper) you still get 7.2 million. Antananarivo, on the other hand, only has 1.3 million per that source (and 2.3 even if you do include the urban area), so what is it doing in this quiz? Where do you get 3.4 million from?
2. Even leaving that aside, the numbers you have don't seem to match up with the source at all. Kinshasa should absolutely be up near the top of the Africa list. Your source lists it as 12.7 million. I'm not sure how to reconcile it with your "Urban area not included" caveat as it is not always clear whether entries in that source include urban areas or not. In the case of Kinshasa it might, but even if you just go by the "24 communes" (closest one can get to a city proper) you still get 7.2 million. Antananarivo, on the other hand, only has 1.3 million per that source (and 2.3 even if you do include the urban area), so what is it doing in this quiz? Where do you get 3.4 million from?