Some sample questions from this category:
* The Nile is usually considered the longest river in the world. Where do the Blue Nile and the White Nile converge to form the Nile proper?
* Sudan is a large country. It is nearly one-fifth the area of which of the following?
* The northern portion of Sudan, other than the Nile valley, consists largely of desert. Which major desert(s) is (are) represented?
* In the 21st century, what has been Sudan's most valuable known natural resource?
* Sudan borders seven countries with border lengths ranging from 109 miles (175km) to 1,357 miles (2184 km). With which country does Sudan share its shortest border?
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