The most difficult world riddles A list of world related questions that are most often answered incorrectly Countries quiz What is the world's most densely populated country?Monaco is far the world's most densely populated country with a population of just 32,410 per 2 cubic kilometers. Singapore is the next most populated mostly because of tourists, but only has about half of Monaco's population per sq. kilometer.very hard 23% TaiwanTaiwan9%IndiaIndia36%MonacoMonaco23%SingaporeSingapore30%Created by: yoshchim. Statistics based on 1918 answers in 2 languages »countries riddles » Which country is not a neighbour of Russia?Uzbekistan. Russia's neighbours are: Norway, Finland, Estonia, Latvia, Belarus, Ukraine, Georgia, Azerbaijan, Kazakhstan, China, Mongolia, North Korea, Lithuania and Poland.very hard 37% NorwayNorway26%UzbekistanUzbekistan37%North KoreaNorth Korea20%AzerbaijanAzerbaijan15%Created by: brombiarz19. Statistics based on 17201 answers in 2 languages »Russia riddles » Which State has caused the most civilian deaths around the world after 9/11?United States. A study reveals that U.S. military forces were directly responsible for about 10 to 15 million deaths during the Korean and Vietnam Wars and the two Iraq Wars.The American public probably is not aware of these numbers and knows even less about the proxy wars for which the United States is also responsible. In the latter wars there were between nine and 14 million deaths in Afghanistan, Angola, Democratic Republic of the Congo, East Timor, Guatemala, Indonesia, Pakistan and Sudan. hard 42% Islamic State (ISIS)Islamic State (ISIS)30%Taliban Islamic Emirate of AfghanistanTaliban Islamic Emirate of Afghanistan4%Al Qaeda GroupsAl Qaeda Groups22%United StatesUnited States42%Created by: Rafeh. Statistics based on 49 answers »military riddles » China, India and the United States are the three most populous countries. Which country comes fourth?Indonesia has 237 millions of inhabitants. It is more than Brazil (201), Pakistan (184) and Nigeria (173), Bangladesh (152), Russia (143) and Japan (127)hard 47% RussiaRussia17%JapanJapan11%BrazilBrazil23%IndonesiaIndonesia47%Created by: globalquiz.org. Statistics based on 21429 answers in 2 languages »geography of Indonesia riddles » What is the smartest animal on the World?Human. The smartest animal is of course human.average 67% MonkeyMonkey6%DolphinDolphin23%ElephantElephant1%HumanHuman67%Created by: lukasz Poland. Statistics based on 371 answers in 2 languages »curiosities riddles » Which religion is the most popular in the world?Christianity. The CIA's World Factbook gives the distribution of religions as Christian 33.39%, Muslim 22.74%, Hindu 13.8%, Buddhist 6.77%, Sikh 0.35%, Jewish 0.22%, Baha'i 0.11%, other religions 10.95%, non-religious 9.66%, atheists 2.01%. (2010 est.)easy 71% ChristianityChristianity71%IslamIslam19%BuddhismBuddhism4%HinduismHinduism4%Created by: globalquiz.org. Statistics based on 26387 answers in 2 languages »Islam riddles » What is the global population today? (It was 3 billion in 1960)7,1 billions. The global population raised twice during the last 50 years. It is estimated to grow to about 8,5 billion until 2030.easy 74% 3,5 billions3,5 billions3%4,2 billions4,2 billions7%5,6 billions5,6 billions14%7,1 billions7,1 billions74%Created by: KYRTAPS. Statistics based on 16223 answers in 2 languages »demography riddles » Which major division within Christianity is the most popular in the world?Roman Catholic. The Roman Catholic Church is the world's largest Christian church, with 1.2 billion members worldwide. There are about 600 millions of Protestants and 350 million of Orthodox Church members.very easy 86% Roman CatholicRoman Catholic86%ProtestantProtestant5%OrthodoxOrthodox6%AnglicanAnglican0%Created by: Teddy. Statistics based on 16531 answers in 2 languages »Christianity riddles » What country did Catherine the Great rule?Russia. Catherine the Second, also called Catherine the Great, was the most renowned and the longest-ruling female leader of Russia, reigning from 1762 until her death in 1796 at the age of 67, expanding much of Russia's borders.very easy 86% United KingdomUnited Kingdom6%FranceFrance3%IrelandIreland2%RussiaRussia86%Created by: Roy Zhu. Statistics based on 13543 answers in 2 languages »women riddles » Play countries quiz and see all the questions.