The most difficult world riddles A list of world related questions that are most often answered incorrectly Geography 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 24% TaiwanTaiwan9%IndiaIndia35%MonacoMonaco24%SingaporeSingapore30%Created by: yoshchim. Statistics based on 970 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 38% NorwayNorway25%UzbekistanUzbekistan38%North KoreaNorth Korea20%AzerbaijanAzerbaijan15%Created by: brombiarz19. Statistics based on 11423 answers in 2 languages »Russia 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 17382 answers in 2 languages »geography of Indonesia 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%IslamIslam20%BuddhismBuddhism4%HinduismHinduism4%Created by: globalquiz.org. Statistics based on 21662 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 73% 3,5 billions3,5 billions3%4,2 billions4,2 billions7%5,6 billions5,6 billions15%7,1 billions7,1 billions73%Created by: KYRTAPS. Statistics based on 13421 answers in 2 languages »demography 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 85% United KingdomUnited Kingdom7%FranceFrance4%IrelandIreland2%RussiaRussia85%Created by: Roy Zhu. Statistics based on 10049 answers in 2 languages »women 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 12742 answers in 2 languages »Christianity riddles » Play geography quiz and see all the questions.