River Run

Follow the longer river. How far will your streak flow?

How to play & scoring

Choose the longer of two named rivers. Each correct answer adds one to your streak. Review the lengths before continuing. A miss ends the run; finish and save whenever you like.

Worked example

If the selected lengths are 900 km and 1,200 km, choose the second river. Three correct comparisons build a streak of three. A miss ends the run, or you can finish and save before another comparison.

Examples illustrate the rules. They are not real country statistics or answers to your round.

What to watch for

Compare the named river under the game's source definition. A river plus its longest tributary can produce a different length from the river alone. Ambiguous river-system records are excluded from this comparison pool.

How we select and compare the data

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