The most difficult World War I riddles A list of World War I related questions that are most often answered incorrectly United Kingdom quiz What was the maximum effective range of the Paris Gun?130 km. The Paris Gun was a German long-range siege gun used to bombard Paris during World War I. The gun was capable of firing a 94 kilogram (210 lb) shell to a maximum altitude of 40 kilometers (25 miles, 131,000 ft). It was the first time for human-made object to reach stratosphere.hard 48% 5 km5 km5%15 km15 km16%45 km45 km29%130 km130 km48%Created by: globalquiz.org. Statistics based on 18281 answers in 2 languages »Paris riddles » Which country developed numerous substitutes for food products during World War I?Germany. Since 1914, the Allied naval blockade of Germany throttled maritime commerce with Germany, forcing Germany to develop substitutes for products (Ersatz) such as tea composed of ground raspberry leaves or catnip, and coffee substitute using roasted acorns. This process was not limited to food, numerous chemical substitutes such as synthetic rubber were also developed at the time.hard 50% United KingdomUnited Kingdom27%FranceFrance10%GermanyGermany50%RussiaRussia10%Created by: Debbie Fox. Statistics based on 10710 answers in 2 languages »history of Germany riddles » What was the name of a ship sunk by Germans in 1915 which caused US to join the First World War? RMS Lusitania. The Imperial German Embassy in U.S. decided to warn passengers not to sail aboard Lusitania. It placed a warning advertisement in 50 American newspapers, just next to an advertisement for the Lusitania's return voyage.hard 56% RMS LusitaniaRMS Lusitania56%RMS TitanicRMS Titanic6%RMS MauritaniaRMS Mauritania15%USS ArizonaUSS Arizona22%Created by: Kasia. Statistics based on 21440 answers in 2 languages »Great Britain riddles » This strange object was built on the coast of Great Britain. What is it?Acoustic mirror. Prior to World War II and the invention of radar, acoustic mirrors were built as early warning devices around the coasts of Great Britain, with the aim of detecting airborne invasions. The development of radar put an end to further experimentation with the technique.easy 72% sun clocksun clock10%storm detectorstorm detector6%acoustic mirroracoustic mirror72%emergency radio receiveremergency radio receiver10%Created by: globalquiz.org. Statistics based on 19906 answers in 2 languages »United Kingdom riddles » Play United Kingdom quiz and see all the questions.