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Rivers, Mountains and Oceans
A word such as largest is useless until it names a measure. A lake can lead in area and lose in volume. A mountain can be the highest above the sea and still not be the tallest measured from its base.
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These ten questions name the measure they mean: length of a river in Africa, height above sea level, surface area of an ocean, or the area of a hot desert. They leave out records that depend on which survey a writer prefers.
Each explanation names the public reference checked on 6 October 2026. The quiz is for entertainment and does not compare your score with anyone else. It also does not ask you to guess how an average person would do. Read the wording with care. There is no time limit. Take the questions one at a time.
Updated 6 October 2026.
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