Statistics for Longest Tributaries

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	Flows into	Tributary	% Correct
~3400	__–Irtysh	Ob via Chulym until Irtysh	100%
2102	Mississippi	Ohio via Allegheny	100%
2364	Mississippi	Arkansas	80%
2400	Amazon	Negro via Vaupés	80%
2549	Paraná	Paraguay	80%
2620	Brahmaputra–Padma	Ganges via Bhagirathi	60%
2188	Mississippi	Red River via Tierra Blanca	60%
3380	Amazon	Madeira via Mamoré and Grande	40%
3210	Amazon	Purus	40%
2021	_______–Araguaia	Tocantins until Araguaia	40%
2989	Yenisei	Lower Tunguska	20%
2272	Congo	Ubangi via Uele	20%
2106	______–Angara	Yenisei via Little Yenisei until Angara	20%
2273	Lena	Aldan	0%
2450	Irtysh	Ishim	0%
2816	Amazon	Japurá	0%
3283	Amazon	Juruá	0%
2153	Congo	Kasai	0%
1999	_______, then Paraná	Pilcomayo	0%
2011	Paraná	Salado del Norte	0%
2291	Amazon	Tapajós via Teles Pires	0%
2650	Lena	Vilyuy	0%