10 most difficult 20th century riddles A list of ten (out of 43) 20th century related questions that are the most often answered incorrectly 20th century 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 »USA riddles » Who invaded Iceland during the WW II in 1940?United Kingdom. Following the German invasion of Denmark and Norway, the British government became increasingly concerned that Germany would soon try to establish a military presence in Iceland. After failing to persuade the Icelandic government to join the Allies, the UK invaded on the morning of 10 May 1940.very hard 23% Nazi GermanyNazi Germany11%Soviet UnionSoviet Union8%United KingdomUnited Kingdom23%no one, because Iceland was neutral no one, because Iceland was neutral 56%Created by: Ninjai. Statistics based on 1237 answers in 2 languages »Iceland riddles » What tank is that?KV-85. The tank presented on this picture is a KV-85, the last of KV series (from surname of soviet marshal Kliment Voroshilov). As the name suggests it had 85 mm gun. Only 148 of them were built.very hard 27% KV-85KV-8527%IS-1IS-113%IS-2IS-221%T-10T-1037%Created by: Raczek246. Statistics based on 437 answers in 2 languages »USSR riddles » Who, among those sentence to death in Nuremberg trials, wasn't hanged?Martin Bormann and Hermann Göring. 10 out of 12 people sentenced to death were hanged on October 16, 1946. Martin Bormann was sentenced in absentia with his remains found in Berlin in 1972 and eventually dated to 2 May 1945. Hermann Göring committed suicide the night before his execution.very hard 29% Joachim von RibbentropJoachim von Ribbentrop19%Martin BormannMartin Bormann15%Hermann GöringHermann Göring35%Martin Bormann and Hermann GöringMartin Bormann and Hermann Göring29%Created by: Ninjai. Statistics based on 4873 answers in 2 languages »Nazi riddles » How was the Berlin Wall officially called in the German Democratic Republic?Anti-fascist Protection Rampart. The name implied that West Germany had not been fully de-Nazified. Before the Wall's erection, 3.5 million East Germans defected from the GDR. Between 1961 and 1989, the wall prevented almost all such emigration.very hard 30% Anti-fascist Protection RampartAnti-fascist Protection Rampart30%Atomic Safety WallAtomic Safety Wall8%Wall of PeaceWall of Peace49%Counterintelligence Fortified ZoneCounterintelligence Fortified Zone11%Created by: Kasia. Statistics based on 8308 answers in 5 languages »Berlin riddles » What country did produce tank L6/40?Italy. Carro Armato L6/40 was an italian light tank. Its construction was based on the chassis of the L3/35 tankiette. There were built 440 of them.very hard 38% USAUSA9%SwedenSweden15%ItalyItaly38%CzechoslovakiaCzechoslovakia36%Created by: Raczek246. Statistics based on 834 answers in 2 languages »tanks riddles » Who was the first man to leave the spacecraft in space?Alexey Arkhipovich Leonov was a Soviet astronaut, general major pilot and two-time Hero of the Soviet Union. On 18 March 1965, he became the first human to conduct extra-vehicular activity, exiting the capsule during the Voskhod 2 mission for a 12-minute spacewalk.very hard 39% Neil Alden ArmstrongNeil Alden Armstrong20%Edwin Eugene Buzz Aldrin, Jr.Edwin Eugene Buzz Aldrin, Jr.7%Alexey Arkhipovich LeonovAlexey Arkhipovich Leonov39%Yuri Alekseyevich GagarinYuri Alekseyevich Gagarin32%Created by: Paweł Kołodziejczyk. Statistics based on 14326 answers in 2 languages »astronauts riddles » BT was a series of Soviet light tanks. What does BT stand for?Bystrochodny tank. The BT tanks (Russian: Bystrochodny tank, lit. "fast moving tank") were a series of Soviet light tanks produced in large numbers between 1932 and 1941. They were lightly armoured, but reasonably well-armed for their time, and had the best mobility of all contemporary tanks.hard 42% bystrobiezny tankbystrobiezny tank29%bystrokhodna tankbystrokhodna tank14%bystrochodny tankbystrochodny tank42%bystroczodny tankbystroczodny tank13%Created by: Ninjai. Statistics based on 1856 answers in 4 languages »history of Russia riddles » Which of these people were the "man of the year" of Time magazine?All mentioned. Person of the Year is an annual issue of the United States news magazine Time that features and profiles a person, a group, an idea, or an object that "for better or for worse... has done the most to influence the events of the year". Adolf Hitler was elected in 1938, and Stalin twice: in 1939 and in 1942.hard 42% Ajatollach ChomejniAjatollach Chomejni14%Adolf HitlerAdolf Hitler37%Józef StalinJózef Stalin5%All mentionedAll mentioned42%Created by: Tschuka. Statistics based on 8401 answers in 3 languages »Iran riddles » What was the first mass production tank developed by Germany?A7V. The A7V was a tank introduced by Germany in 1918, during World War I. They were used in action from March to October 1918, and were the only tanks produced by Germany in World War I to be used in combat.hard 43% LeichttraktorLeichttraktor23%LK ILK I20%LK IILK II13%A7VA7V43%Created by: Ninjai. Statistics based on 1359 answers in 2 languages »World War I riddles » Play 20th century quiz and see all the questions.