10 most difficult United States riddles A list of ten (out of 76) United States related questions that are the most often answered incorrectly United States quiz Which river flows into Lake Ontario?Niagara River flows from Lake Erie to Lake Ontario.very hard 24% Niagara RiverNiagara River24%Saint Lawrence RiverSaint Lawrence River54%Ohio RiverOhio River14%Columbia RiverColumbia River5%Created by: globalquiz.org. Statistics based on 1296 answers in 9 languages »lakes riddles » Which team won the most of NBA championships?Boston Celtics. Celtics dominated the League in the '60s winning 8 titles in a row and missing only one season of 1966-67. Boston total score is 17 championships. Next comes LA Lakers (16), Chicago Bulls (6) and San Antonio Spurs (5).very hard 24% San Antonio SpursSan Antonio Spurs3%Chicago BullsChicago Bulls38%Boston CelticsBoston Celtics24%Los Angeles LakersLos Angeles Lakers33%Created by: smyru. Statistics based on 1235 answers in 2 languages »the United States riddles » Which state in the United States has a city that has their McDonald's sign turquoise? Arizona. The city of Sedona in Arizona mixes the yellow M with rock around it to make it turquoise. Officials in Sedona, Arizona told the fast-food giant they were unable to open a restaurant with the trademark yellow logo. This is due to the city's strict regulations which prevent buildings from ruining the picturesque view of the desert. very hard 25% ArizonaArizona25%NebraskaNebraska25%West VirginiaWest Virginia25%CaliforniaCalifornia25%Created by: yoshchim. Statistics based on 12 answers »logo riddles » Which European was the first to discover America?Bjarni Herjólfsson. Bjarni was heading to Greenland to visit his father in 986, when he drifted south and found himself near the coast of today Canada. Despite his crew eagerness, he refused to land and only attested the discovery of a land full of trees and hills.very hard 26% Bjarni HerjólfssonBjarni Herjólfsson26%Marco PoloMarco Polo7%Christopher ColumbusChristopher Columbus48%Amerigo VespucciAmerigo Vespucci17%Created by: smyru. Statistics based on 2481 answers in 2 languages »discoverers riddles » How many Summer Olympic games were held in the United States?4. There were Olympic Games in St. Louis (1904), twice in Los Angeles (1932, 1984) and in Atlanta (1996)very hard 28% 1111%2231%3328%4428%Created by: Kasia. Statistics based on 8637 answers in 2 languages »sport of North America 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 29% Rio GrandeRio Grande24%YukonYukon29%ColoradoColorado42%ArkansasArkansas3%Created by: globalquiz.org. Statistics based on 9662 answers in 2 languages »Alaska riddles » Why is White Sands Desert in New Mexico so purely white?It is gypsum. White Sands, having 442 total square kilometers of dune fields, is the world's largest surface deposit of gypsum. Unlike other desert sands, it is cool to the touch, due to the high rate of evaporation of surface moisture and the fact that the sands reflect, rather than absorb, the sun's rays.very hard 30% it is gypsumit is gypsum30%it is very fine grained sandit is very fine grained sand10%it iswhite quartzit iswhite quartz36%it is an optical illusionit is an optical illusion22%Created by: Debbie Fox. Statistics based on 12763 answers in 4 languages »soil riddles » What nationality was Martin Van Buren?American. Martin Van Buren was the eighth president of the United States. 'Van' suggests Dutch origin of his surname, but the capitalized form indicates anglicised version - like Eddie Van Halen (as opposite to Dutch lower-case Vincent van Gogh).very hard 31% DutchDutch52%AmericanAmerican31%RussianRussian3%GermanGerman12%Created by: globalquiz.org. Statistics based on 11104 answers in 2 languages »presidents of the United States riddles » Which was the last of the contiguous states to become a U.S. state?Arizona is the place of the Apache resistance. It became a U.S. state on February 14, 1912. This resulted in the end to the territorial colonization of Continental North America. very hard 32% New YorkNew York16%TexasTexas21%ArizonaArizona32%North DakotaNorth Dakota28%Created by: Sumit Tamang. Statistics based on 4795 answers in 2 languages »Amerindians riddles » 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 35% MississippiMississippi50%MissouriMissouri35%YukonYukon7%Rio GrandeRio Grande6%Created by: Shankar Kumar. Statistics based on 5536 answers in 4 languages »rivers of North America riddles » Play United States quiz and see all the questions.