10 most difficult USA riddles A list of ten (out of 47) USA related questions that are the most often answered incorrectly USA quiz What is weapon shown on the image?Mark 4 Carbine. In 1990's U.S. army and marines replaced M16 Rifles with newly designed M4 Carbines which were more compact and comfortable in use.By 2015 M4 was made prime infantry rifle in U.S. weaponry.very hard 13% AK-sAK-s20%Mark 4 CarbineMark 4 Carbine13%M16 RifleM16 Rifle66%Ump-45Ump-450%Created by: grifi bastion. Statistics based on 15 answers in 2 languages »20th century riddles » When did the USA introduce metric system as preferred for weights and measures?1975. President Gerald Ford signed the Metric Conversion Act in1975. It declared the metric system "the preferred system of weights and measures for United States trade and commerce", but permitted the use of United States customary units in all activities. The metrification board was abolished in 1982 by President Ronald Reagan.very hard 17% nevernever62%180518054%1866186615%1975197517%Created by: Ninjai. Statistics based on 351 answers in 3 languages »measures riddles » Telstar was the first, non-military satellite launched in 1962. It broke merely after 5 months. What was the cause?Nuclear explosion. In July 1962 USA conducted high altitude nuclear test of antirocket of 1.4 megatonnes of TNT. The explosion conducted at the height of 250 miles destroyed 1/3 of all satellites, including Telstar.very hard 19% magnetic stormmagnetic storm21%collision with meteorcollision with meteor22%nuclear explosionnuclear explosion19%software flawsoftware flaw36%Created by: smyru. Statistics based on 545 answers in 2 languages »nuclear tests riddles » Which of these fast food chains is the oldest?KFC-1930. McDonald's-1940. Dunkin 'Donuts-1950 Burger King-1954very hard 25% KFCKFC25%McDonald'sMcDonald's25%Dunkin’ DonutsDunkin’ Donuts33%Burger KingBurger King15%Created by: Tschuka. Statistics based on 1570 answers in 3 languages »brands riddles » Which country didn't try to colonize California?Portugal. As a matter of fact the first European who explored California was Portuguese on Spanish duty - Cabrillo. However, his country never tried to estabilish colonies there. very hard 26% SpainSpain3%PortugalPortugal26%RussiaRussia53%Great Britain Great Britain 16%Created by: Mikołaj Sołkiewicz. Statistics based on 537 answers in 3 languages »California riddles » What is the National Bird of the United States ?Bald eagle. The bald eagle is both the national bird and national animal of the United States of America. The bald eagle appears on its seal. In the late 20th century it was on the brink of extirpation in the contiguous United States. Populations have since recovered and the species was removed from the U.S. government's list of endangered species on July 12, 1995 very hard 26% Martial eagleMartial eagle20%Bald eagleBald eagle26%White-tailed eagleWhite-tailed eagle16%Golden eagleGolden eagle37%Created by: Tschuka. Statistics based on 300 answers in 2 languages »birds riddles » How many amendments to the USA constitution have been repealed?One. Of 27 ratified amendments to USA Constitution only one has been repealed. This was 18th amendment of 1917 that had introduced the American prohibition. It was repealed in 1933. very hard 28% oneone28%threethree22%sixsix13%nonenone34%Created by: smyru. Statistics based on 1243 answers in 2 languages »prohibition riddles » Which team has won the most Super Bowl titles?Pittsburgh Steelers has won this trophy six times in 1974, 1975, 1978, 1979, 2005 and 2008.very hard 28% Dallas CowboysDallas Cowboys22%Pittsburgh SteelersPittsburgh Steelers28%San Francisco 49ersSan Francisco 49ers13%New York GiantsNew York Giants35%Created by: Ninjai. Statistics based on 559 answers in 3 languages »sport riddles » Which of these cities has the closest latitude to Washington, D.C.?Beijing. Washington, D.C. - 38° 54′ 17″ N, Beijing - 39° 55′ 0″ N, Tbilisi - 41° 43′ 0″ N, Rome - 41° 54′ 0″ N and Tokyo - 35° 41′ 0″ N.very hard 34% RomeRome32%TbilisiTbilisi15%BeijingBeijing34%TokyoTokyo17%Created by: Ninjai. Statistics based on 803 answers in 2 languages »maps riddles » The picture above illustrates the capitulation of British army in Yorktown. Which side actually capitulates?Middle. In the center of the scene, American General Benjamin Lincoln appears mounted on a white horse. He extends his right hand toward the sword carried by the surrendering British officer, General Charles O'Hara, who heads the long line of troops that extends into the background. To the left, French officers appear standing and mounted beneath the white banner of the royal Bourbon family. On the right are American officers beneath the Stars and Stripesvery hard 35% leftleft40%middlemiddle35%rightright10%neitherneither13%Created by: Ninjai. Statistics based on 1641 answers in 3 languages »history of the United States riddles » Play USA quiz and see all the questions.