Which River in South America?

Name these South American rivers based on their starting letter and a description.

First letter corresponds to the first letter other than words meaning river unless the river always has that word in its name e.g. Rio Grande

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Last updated: March 31, 2020

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First submitted	January 16, 2019
Times taken	50
Average score	50.0%
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#	Description	Letter	River
1	The longest river of the continent	A	Amazon
2	Flows through Venezuela, has a large delta	O	Orinoco
3	This river separates Montevideo from Buenos Aires	R	Rio de la Plata
4	Rivers forming #3	P	Parana
5	Rivers forming #3	U	Uruguay
6	Longest tributary of #1	N	Negro
7	Porto Velho, Brazil's river	M	Madeira
8	Rivers forming #7	M	Madre de Dios
9	Rivers forming #7	M	Mamore
10	Tributary flowing into #1, has a namesake Brazillian state	T	Tocantins
11	Guyana's longest river	E	Essequibo
12	The two rivers forming #1	M	Maranon
13	The two rivers forming #1	U	Ucayali
14	Tributary of #1, one of the longest beginning with its letter	X	Xingu