It took me way too many attempts to get them all. I deliberately didn't look at the results and kept forgetting if I SHOULD or should NOT include one, so my previous attempts only confused me..
"Longest river" is subject to debate, I always learned it is the Amazon in school (in France) but as I checked Wikipedia, the English version says the Nile is longer and the French version says it is the Amazon, depending on which tributaries are taken into account.
Nominated :)