10 most difficult rivers riddles A list of ten (out of 28) 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 23% MississippiMississippi61%MissouriMissouri23%YukonYukon8%Rio GrandeRio Grande6%Created by: Shankar Kumar. Statistics based on 3872 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 25% VistulaVistula45%NevaNeva25%DaugavaDaugava8%NemanNeman19%Created by: globalquiz.org. Statistics based on 2496 answers in 2 languages »Baltic Sea 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 Grande22%YukonYukon30%ColoradoColorado42%ArkansasArkansas3%Created by: globalquiz.org. Statistics based on 7654 answers in 2 languages »geography of the United States riddles » Which of the following North American rivers has the lowest discharge?Rio Grande is the fourth or fifth longest river system in North America, but it flows through arid and desert regions. The average discharge is just 82 m³/s (St Lawrence: 10100, Yukon: 6200, Colorado: 1200). It is also very variable, occasionally rising to over 10000 m³/s or dropping to 1 m³/s. During portions of 2001 and 2002 the mouth of the Rio Grande was blocked by a sandbar. very hard 37% Rio GrandeRio Grande37%St LawrenceSt Lawrence24%YukonYukon19%ColoradoColorado18%Created by: Riho Ishii. Statistics based on 9101 answers in 2 languages »geography of Mexico 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 38% water temperaturewater temperature34%sea currents speedsea currents speed13%water salinitywater salinity38%sea depthsea depth14%Created by: globalquiz.org. Statistics based on 9190 answers in 4 languages »oceans riddles » Where is the Kwai river?In Thailand. River Kwai in Thailand today, but there was no such river when the "bridge on the River Kwai" was created. The movie tells a fictional story, and the film crew built a wooden bridge on the Mae Klong river. This part of the river was then renamed Khwae Yai to bring geographical fact more in line with the movie.hard 40% in Chinain China8%in Thailandin Thailand40%in Vietnamin Vietnam33%in Cambodiain Cambodia18%Created by: Kasia. Statistics based on 14343 answers in 2 languages »Thailand riddles » The Elevation of Lake Superior is 183m, Michigan 177m, Huron 176m and Erie 174m. How about Ontario?75m. The gradient between The Great Lakes is generally very shallow. However, the descent between Erie and Ontario is greater than between any of the others, and includes the spectacular Niagara Falls, 51m high.hard 40% 173m173m12%172m172m24%168m168m22%75m75m40%Created by: globalquiz.org. Statistics based on 9722 answers in 2 languages »geography of Canada riddles » Which city is associated with cremated bodies lying on the banks of a river?Varanasi. Hindus believe that bathing in the Ganges remits sins and that dying in Varanasi ensures release of a person's soul from the cycle of its transmigrations. Those who are lucky enough to die in Varanasi, are cremated on the banks of the Ganges, and are granted instant salvation. Thus, many Hindus arrive here for dying.hard 45% HyderabadHyderabad9%KanpurKanpur33%VaranasiVaranasi45%LuxorLuxor12%Created by: globalquiz.org. Statistics based on 10882 answers in 4 languages »death riddles » What is the world's deepest river?Congo is the deepest river in the world, reaching 250 meters of depth in the deepest trench. It is followed by Yangtze (200m) and Danube (178m). The maximum depth of the Amazon River is 80m.hard 45% Amazon RiverAmazon River22%DanubeDanube11%CongoCongo45%YangtzeYangtze20%Created by: globalquiz.org. Statistics based on 8642 answers in 4 languages »geography of Africa riddles » Which large river flows through Rio de Janeiro? ("rio" is Portuguese for "river")None. Portuguese were the Europeans who encountered Guanabara Bay on January 1,1502. They took it for a large river, which they named "Rio de Janeiro" ("January River"). Later it was discovered, that the presumed river was in fact a gulf, but the name remained.hard 46% JaneiroJaneiro30%La PlataLa Plata17%CorcovadoCorcovado6%NoneNone46%Created by: globalquiz.org. Statistics based on 8511 answers in 4 languages »Age of Discovery riddles » Play rivers quiz and see all the questions.