| Top 10 Oldest African Countries | 0 | - | 4.88 | 27,798 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,506 |
| Straight Shot to Antarctica | 0 | - | 4.94 | 42,719 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 31,804 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,326 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,645 |
| Countries of Europe in 1848 | 0 | - | 4.99 | 75,950 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,076 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,561 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,453 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,421 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 528,069 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,982 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 267,542 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,180 |
| Save Europeans by Guessing Countries | 0 | - | 4.83 | 211,355 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 60,777 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,407 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,934 |
| Name the English Monarchs | 0 | - | 4.91 | 500,551 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 278,346 |
| Colonies of Africa with a Map | 0 | - | 4.78 | 54,247 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,678,976 |
| History of Russia Quiz | 0 | - | 4.49 | 31,859 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 645,128 |
| Name that Greek Letter | 0 | - | 4.93 | 322,754 |
| History of Italy | 0 | - | 4.55 | 31,911 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,586 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,115 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,750 |
| Prime Ministers of the UK | 0 | - | 4.95 | 437,000 |
| Europe Map Quiz | 0 | - | 5.00 | 4,748,893 |
| The Trojan War | 0 | - | 4.83 | 39,597 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,295 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,330 |
| Roman Emperors | 0 | - | 4.95 | 119,426 |
| Africa Map Quiz | 0 | - | 5.00 | 2,111,883 |
| Oceania Map Quiz | 0 | - | 4.98 | 639,156 |
| Australian Capitals | 0 | - | 4.92 | 62,672 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 68,894 |
| Official European Union Languages | 0 | - | 4.97 | 237,809 |
| European Countries in their Native Language | 0 | - | 4.99 | 157,414 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 426,826 |
| Olympian Gods Quiz | 0 | - | 4.96 | 498,801 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 125,221 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,444,720 |
| Asia Map Quiz | 0 | - | 4.99 | 911,905 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,708 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,492 |
| Countries by Founding Story | 0 | - | 4.95 | 76,936 |
| Independence from Whom | 0 | - | 4.99 | 210,982 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,453 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,278 |
| History of India | 0 | - | 4.61 | 21,363 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 46,373 |
| African East Coast | 0 | - | 4.96 | 95,620 |
| Western Africa Map Quiz | 0 | - | 4.97 | 73,447 |
| History of South Africa | 0 | - | 4.60 | 17,646 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 50,275 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 425,311 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 211,311 |
| Countries That Use the Euro | 0 | - | 4.95 | 104,142 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,789 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 114,475 |
| The Only European Country ... | 0 | - | 4.91 | 215,428 |
| Most Forested European Countries | 0 | - | 4.80 | 75,157 |
| Least Forested Countries in Asia | 0 | - | 4.74 | 64,586 |
| European Countries NOT in NATO | 0 | - | 4.90 | 60,476 |
| History of Austria | 0 | - | 4.70 | 17,815 |
| Geography of the French Empire | 0 | - | 4.45 | 27,008 |
| The French Revolution | 0 | - | 4.46 | 23,878 |
| History of France | 0 | - | 4.59 | 56,678 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,443 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 73,284 |
| Ancient Greek Words | 0 | - | 4.93 | 111,186 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,882 |
| The Vikings! | 0 | - | 4.46 | 28,300 |
| The Portuguese Empire | 0 | - | 4.58 | 12,035 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,693 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,281 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,172 |
| Geography of the British Empire | 0 | - | 4.48 | 39,602 |
| South and Central Asia Map Quiz | 0 | - | 4.93 | 98,325 |
| Countries that Have Controlled Mesopotamia | 0 | - | 4.15 | 15,523 |
| History of Iran | 0 | - | 4.66 | 16,318 |
| History of China | 0 | - | 4.37 | 56,952 |
| Countries of the World in 1900 | 0 | - | 4.89 | 84,272 |
| Countries of the World in 1914 with a Map | 0 | - | 4.99 | 194,325 |
| Countries of the World in 1945 with a Map | 0 | - | 5.00 | 150,005 |
| Recently Independent Countries | 0 | - | 4.98 | 158,471 |
| Historical City to Country | 0 | - | 4.84 | 78,363 |
| Countries by Former Name | 0 | - | 4.99 | 124,747 |
| Cities by Former Name | 0 | - | 4.84 | 91,316 |
| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 109,624 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.69 | 55,344 |
| Countries of Africa | 0 | - | 5.00 | 2,524,101 |
| Australia Map Quiz | 0 | - | 4.94 | 343,450 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,810 |
| History of Mexico | 0 | - | 4.58 | 15,274 |
| United States Map Quiz | 0 | - | 4.98 | 4,149,793 |
| Recommended Childhood Vaccines for Americans | 0 | - | 4.42 | 14,683 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 380,578 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 190,913 |
| Play-Doh Presidents | 0 | - | 5.00 | 81,996 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,326 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 363,460 |
| Celtic Nations | 0 | - | 4.69 | 46,881 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,885 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,852 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,178 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 435,433 |
| History of The Netherlands | 0 | - | 4.46 | 17,375 |
| Medieval English History | 0 | - | 4.53 | 43,423 |
| Top 10 Most Forested Countries in Asia | 0 | - | 4.63 | 63,313 |
| Middle East Map Quiz | 0 | - | 4.99 | 1,379,727 |
| Ottoman Empire Quiz | 0 | - | 4.42 | 17,084 |
| Chinese Inventions | 0 | - | 4.30 | 33,764 |
| Africa Cities Map Quiz | 0 | - | 4.97 | 98,738 |
| Flags of Africa Quiz | 0 | - | 5.00 | 467,583 |
| Top 10 Biggest African Countries by Area | 0 | - | 4.99 | 216,362 |
| 10 Southernmost Countries in Africa | 0 | - | 4.98 | 115,989 |
| 10 Northernmost Countries in Africa | 0 | - | 4.98 | 160,786 |
| Top 10 Smallest African Countries by Area | 0 | - | 4.96 | 32,903 |
| African Countries with the Shortest Names | 0 | - | 4.98 | 152,867 |
| Top African Languages on a Map | 0 | - | 4.92 | 73,348 |
| African Island Countries | 0 | - | 4.96 | 101,247 |
| Countries of Africa with an Empty Map | 0 | - | 5.00 | 242,758 |
| All First-Level Subdivisions of Africa on a Map | 0 | - | 4.92 | 33,032 |
| Australian States and Territories | 0 | - | 4.96 | 141,468 |
| Australian Immigration by Country | 0 | - | 4.81 | 77,173 |
| Australia True or False | 0 | - | 4.87 | 56,705 |
| Flags of North and South America | 0 | - | 4.99 | 370,785 |
| 10 Biggest American Countries by Area | 0 | - | 4.95 | 112,442 |
| Top 10 Most Populous American Countries | 0 | - | 4.97 | 143,592 |
| Latin American Countries Map Quiz | 0 | - | 4.97 | 129,010 |
| South America Map Quiz | 0 | - | 5.00 | 1,545,570 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,018,333 |
| North America Map Quiz | 0 | - | 4.98 | 246,948 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,583 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,059 |
| U.S. History for Dummies | 0 | - | 4.47 | 82,810 |
| Canada Provinces and Territories | 0 | - | 5.00 | 340,306 |
| Canada Provinces Map Quiz | 0 | - | 4.99 | 638,286 |
| Most Spoken Languages in Canada | 0 | - | 4.91 | 54,931 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,161 |
| European Countries Ending in "IA" | 0 | - | 4.96 | 67,911 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,332 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,236,437 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,324,283 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 192,243 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 150,781 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 217,672 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 86,839 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,150 |
| Least Forested European Countries | 0 | - | 4.25 | 53,914 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 309,537 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 169,798 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 68,484 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,829 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,587 |
| Slavic Countries | 0 | - | 4.96 | 111,332 |
| French History Multiple Choice | 0 | - | 4.55 | 32,964 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,217 |
| History of Germany | 0 | - | 4.39 | 52,740 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 73,319 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,562 |
| Figures from Greek Mythology | 0 | - | 4.91 | 186,021 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,652 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,814 |
| Roman Names for Places | 0 | - | 4.62 | 58,094 |
| Byzantine History | 0 | - | 4.91 | 28,720 |
| History of Spain | 0 | - | 4.23 | 21,055 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,093 |
| Counties of England | 0 | - | 4.97 | 793,245 |
| Anglo-Saxon Kingdoms of England | 0 | - | 4.60 | 25,727 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,705 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.78 | 20,116 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,512 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,066 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,905 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 353,045 |
| Flags of Asia Quiz | 0 | - | 4.99 | 609,810 |
| East Asia Cities Map Quiz | 0 | - | 4.96 | 109,915 |
| 10 Biggest Asian Countries by Area | 0 | - | 4.97 | 153,315 |
| 10 Southernmost Countries in Asia | 0 | - | 4.97 | 98,803 |
| 10 Easternmost Countries in Asia | 0 | - | 4.99 | 107,652 |
| Countries of Asia with Two or More Words | 0 | - | 4.96 | 126,425 |
| Asian Countries Ending in "IA" | 0 | - | 4.96 | 107,074 |
| Top Asian Languages on a Map | 0 | - | 4.95 | 71,111 |
| Countries of Asia with an Empty Map | 0 | - | 4.98 | 229,709 |
| All First-Level Subdivisions of Asia on a Map | 0 | - | 4.93 | 49,611 |
| Countries of the Middle East | 0 | - | 4.96 | 200,070 |
| History of Egypt | 0 | - | 4.58 | 23,988 |
| Countries where Arabic is an Official Language | 0 | - | 4.85 | 72,380 |
| Former Flags | 0 | - | 4.97 | 107,276 |
| Warsaw Pact Countries | 0 | - | 4.83 | 84,404 |
| Countries of Europe in 1444 | 0 | - | 4.92 | 99,276 |
| Countries of the World in 1444 | 0 | - | 4.98 | 59,960 |
| Modern-Day Countries of the Inca Empire on a Map | 0 | - | 4.83 | 57,180 |
| Modern Day Countries of the Kushan Empire on a Map | 0 | - | 4.89 | 24,720 |
