10 most difficult rivers riddles A list of ten (out of 69) rivers related questions that are the most often answered incorrectly Rivers quiz What is the longest river in the United States?Missouri. The Missouri River is the longest river in North America. Having 2,341 mi (3,768 km), it is longer than the Mississippi (2,202 mi 3,544 km). When combined with the lower Mississippi River, it forms the world's third longest river system, after the Nile and Amazon.very hard 26% MississippiMississippi58%MissouriMissouri26%YukonYukon8%Rio GrandeRio Grande6%Created by: Shankar Kumar. Statistics based on 4500 answers in 4 languages »rivers of North America riddles » What is the largest affluent of the Baltic Sea in terms of mean discharge?Neva. Vistula is the longest of Baltic Sea affluents, but its mean discharge of 1080 m3/s is less than half of Neva (2500 m3/s). Other major Baltic Sea affluents are Daugawa nad Neman (both 678 m3/s).very hard 26% VistulaVistula44%NevaNeva26%DaugavaDaugava10%NemanNeman19%Created by: globalquiz.org. Statistics based on 3127 answers in 2 languages »Baltic Sea riddles » Which river flows into Lake Ontario?Niagara River flows from Lake Erie to Lake Ontario.very hard 26% Niagara RiverNiagara River26%Saint Lawrence RiverSaint Lawrence River55%Ohio RiverOhio River11%Columbia RiverColumbia River6%Created by: globalquiz.org. Statistics based on 810 answers in 9 languages »lakes riddles » Which river flows into the Arabian Sea?Indus rises in the Himalayas and flows southwards into the Arabian Sea. Other large rivers of the Indian subcontinent: Ganges or Brahmaputra, flow into the Bay of Bengal.very hard 27% IndusIndus27%GangesGanges21%Syr DaryaSyr Darya14%Jordan RiverJordan River36%Created by: globalquiz.org. Statistics based on 821 answers in 9 languages »Pakistan riddles » What is the third longest river of the North America? (after Mississippi and Missouri)Yukon, having 1,979 mi (3,185 km), is just 223 miles shorter than Mississippi. Despite its length, there are only four vehicles-carrying bridges across the river.very hard 30% Rio GrandeRio Grande23%YukonYukon30%ColoradoColorado41%ArkansasArkansas3%Created by: globalquiz.org. Statistics based on 8698 answers in 2 languages »geography of the United States riddles » Which river flows into the Sea of Azov?Don River. Sea of Azov is a small and shallow sea, sometimes regarded as a northern extension of the Black Sea. Two large rivers, Don and Kuban, flow into it, and so the sea has low salinity and a high amount of biomass (such as green algae) that affects the water colour. It was known in Ottoman Turkish as the Balük-Denis ("Fish Sea") from its high productivity.very hard 35% VolgaVolga20%Amur RiverAmur River30%AngaraAngara13%Don RiverDon River35%Created by: globalquiz.org. Statistics based on 1480 answers in 9 languages »Ukraine riddles » What is the largest river flowing into the Arctic Ocean?Yenisei. The average discharge of Yenisei is 19,600 m³/s. It is more than Mississippi, Ganges or Paraná.very hard 35% YukonYukon29%NevaNeva8%AmurAmur26%YeniseiYenisei35%Created by: globalquiz.org. Statistics based on 1428 answers in 9 languages »Arctic riddles » Which river flows into the Bering Sea?Yukon River. The total length of the river is 1982 miles (3190 km). There are only four vehicle-carring bridges across the Yukon River.very hard 36% Lena RiverLena River15%YeniseiYenisei23%Amur RiverAmur River24%Yukon RiverYukon River36%Created by: globalquiz.org. Statistics based on 1369 answers in 9 languages »seas riddles » What does the color range represent in this picture?Water salinity. Launched June 10, 2011, Aquarius is NASA’s first satellite instrument specifically designed to study the salt content of ocean surface waters. The complete first year dataset of NASA's Aquarius instrument reveals seasonal changes in the Amazon River's plume. Depending on the prevailing currents, the river's freshwater outflow heads east toward Africa or bends up north to the Caribbean.very hard 39% water temperaturewater temperature33%sea currents speedsea currents speed12%water salinitywater salinity39%sea depthsea depth13%Created by: globalquiz.org. Statistics based on 11411 answers in 4 languages »satellite photography riddles » Which river flows through Hanoi?Red River. The waters of river are indeed reddish because of the large amounts of red silt. hard 40% Red RiverRed River40%MekongMekong31%Han RiverHan River19%Kwai RiverKwai River7%Created by: globalquiz.org. Statistics based on 2135 answers in 9 languages »Vietnam riddles » Play rivers quiz and see all the questions.