| North America Map Quiz | 0 | - | 4.98 | 245,633 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,456 |
| Most Spoken Languages in Canada | 0 | - | 4.91 | 54,768 |
| Countries of North America with an Empty Map | 0 | - | 4.99 | 94,070 |
| Top 10 Oldest African Countries | 0 | - | 4.88 | 27,536 |
| Most-Spoken Languages of the United States | 0 | - | 4.52 | 217,429 |
| U.S. Highway Signs By State | 0 | - | 4.46 | 15,411 |
| Most Common High School Mascots | 0 | - | 4.47 | 31,888 |
| Canada Multiple Choice Quiz | 0 | - | 4.50 | 48,999 |
| Canada Geography Trivia | 0 | - | 4.80 | 47,411 |
| 10 Biggest American Countries by Area | 0 | - | 4.95 | 112,262 |
| Top 10 Most Populous American Countries | 0 | - | 4.97 | 143,336 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,641 |
| Name a Valid Answer - United States #1 | 0 | - | 4.61 | 93,563 |
| Uruguay Country Quiz | 0 | - | 4.83 | 31,407 |
| Native American Tribes in the US | 0 | - | 4.72 | 25,294 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,222 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,229 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,666 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,695 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,326 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,212 |
| North American Physical Geography | 0 | - | 4.35 | 30,369 |
| Most Populous Native American Tribes | 0 | - | 4.28 | 12,413 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,115 |
| American Countries on the Pacific Coast | 0 | - | 4.80 | 49,083 |
| Top U.S. Cash Crops | 0 | - | 4.39 | 62,142 |
| Things Named For People #2 - U.S. Centric | 0 | - | 4.21 | 52,552 |
| Largest Asian-American Ethnic Groups | 0 | - | 4.11 | 40,851 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 526,950 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,578 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 266,841 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,517 |
| Save Europeans by Guessing Countries | 0 | - | 4.84 | 210,302 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 60,509 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,241 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,669 |
| Name the English Monarchs | 0 | - | 4.92 | 499,039 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 277,796 |
| All Modern-Day Countries Ever Controlled by Chinese People | 0 | - | 4.82 | 54,403 |
| Colonies of Africa with a Map | 0 | - | 4.78 | 54,074 |
| Haiti... or Dominican Republic? | 0 | - | 4.70 | 40,612 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,664,533 |
| History of Russia Quiz | 0 | - | 4.49 | 31,817 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 643,301 |
| Name that Greek Letter | 0 | - | 4.94 | 322,100 |
| History of Italy | 0 | - | 4.55 | 31,862 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,524 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,033 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,643 |
| Prime Ministers of the UK | 0 | - | 4.96 | 435,584 |
| The U.S. Pledge of Allegiance | 0 | - | 3.98 | 18,309 |
| U.S. Geography True or False #1 | 0 | - | 4.53 | 28,616 |
| U.S. Geography - Multiple Choice | 0 | - | 4.41 | 24,689 |
| Name a Valid Answer - United States #2 | 0 | - | 4.16 | 27,176 |
| Europe Map Quiz | 0 | - | 5.00 | 4,738,704 |
| The Trojan War | 0 | - | 4.83 | 39,498 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,864 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,163 |
| Roman Emperors | 0 | - | 4.95 | 118,795 |
| Africa Map Quiz | 0 | - | 5.00 | 2,107,352 |
| Oceania Map Quiz | 0 | - | 4.98 | 636,897 |
| Australian Capitals | 0 | - | 4.92 | 62,613 |
| Three Real and One Fake - U.S. Geography | 0 | - | 4.34 | 29,254 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 68,732 |
| Official European Union Languages | 0 | - | 4.97 | 237,273 |
| European Countries in their Native Language | 0 | - | 4.99 | 157,102 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 425,885 |
| Olympian Gods Quiz | 0 | - | 4.96 | 497,414 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 124,713 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,442,537 |
| Asia Map Quiz | 0 | - | 4.99 | 908,811 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,299 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,298 |
| Countries by Founding Story | 0 | - | 4.95 | 76,695 |
| Independence from Whom | 0 | - | 4.99 | 210,093 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,030 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,110 |
| History of India | 0 | - | 4.61 | 21,315 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 46,010 |
| African East Coast | 0 | - | 4.96 | 95,278 |
| Western Africa Map Quiz | 0 | - | 4.97 | 73,174 |
| History of South Africa | 0 | - | 4.60 | 17,625 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 50,023 |
| Largest Land Animals of the Americas | 0 | - | 4.38 | 20,212 |
| New World Crops | 0 | - | 4.33 | 27,180 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 424,346 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 210,622 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,369 |
| Countries That Use the Euro | 0 | - | 4.95 | 103,491 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,629 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 113,960 |
| The Only European Country ... | 0 | - | 4.91 | 214,535 |
| European Countries NOT in NATO | 0 | - | 4.87 | 59,954 |
| History of Austria | 0 | - | 4.70 | 17,779 |
| Geography of the French Empire | 0 | - | 4.45 | 26,964 |
| The French Revolution | 0 | - | 4.46 | 23,831 |
| History of France | 0 | - | 4.59 | 56,371 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,408 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 72,860 |
| Ancient Greek Words | 0 | - | 4.92 | 110,911 |
| Ancient Rome - True or False? | 0 | - | 4.85 | 42,683 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,727 |
| The Vikings! | 0 | - | 4.46 | 28,267 |
| The Portuguese Empire | 0 | - | 4.54 | 12,008 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,621 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,236 |
| Countries the UK Declared War On | 0 | - | 4.61 | 121,974 |
| Geography of the British Empire | 0 | - | 4.48 | 39,535 |
| South and Central Asia Map Quiz | 0 | - | 4.93 | 97,894 |
| Countries that Have Controlled Mesopotamia | 0 | - | 4.15 | 15,505 |
| History of Iran | 0 | - | 4.65 | 16,287 |
| History of China | 0 | - | 4.37 | 56,787 |
| Countries of the World in 1900 | 0 | - | 4.89 | 83,816 |
| Countries of the World in 1914 with a Map | 0 | - | 4.99 | 193,601 |
| Countries of the World in 1945 with a Map | 0 | - | 5.00 | 149,349 |
| Recently Independent Countries | 0 | - | 4.98 | 158,180 |
| Historical City to Country | 0 | - | 4.84 | 78,222 |
| Countries by Former Name | 0 | - | 4.99 | 124,492 |
| Cities by Former Name | 0 | - | 4.84 | 91,128 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.69 | 55,238 |
| Countries of Africa | 0 | - | 5.00 | 2,514,307 |
| Australia Map Quiz | 0 | - | 4.94 | 342,881 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,743 |
| History of Mexico | 0 | - | 4.58 | 15,244 |
| United States Map Quiz | 0 | - | 4.98 | 4,145,210 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 379,978 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 190,284 |
| Play-Doh Presidents | 0 | - | 5.00 | 81,799 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,174 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 362,786 |
| Celtic Nations | 0 | - | 4.69 | 46,841 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,824 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,804 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,066 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 434,429 |
| History of The Netherlands | 0 | - | 4.46 | 17,344 |
| Medieval English History | 0 | - | 4.53 | 43,351 |
| Middle East Map Quiz | 0 | - | 4.99 | 1,377,753 |
| Ottoman Empire Quiz | 0 | - | 4.42 | 17,055 |
| Chinese Inventions | 0 | - | 4.30 | 33,739 |
| Africa Cities Map Quiz | 0 | - | 4.97 | 98,536 |
| Flags of Africa Quiz | 0 | - | 5.00 | 465,073 |
| Top 10 Biggest African Countries by Area | 0 | - | 4.99 | 215,913 |
| 10 Southernmost Countries in Africa | 0 | - | 4.98 | 115,736 |
| 10 Northernmost Countries in Africa | 0 | - | 4.98 | 160,494 |
| Top 10 Smallest African Countries by Area | 0 | - | 4.96 | 32,669 |
| African Countries with the Shortest Names | 0 | - | 4.98 | 152,422 |
| Top African Languages on a Map | 0 | - | 4.92 | 72,875 |
| African Island Countries | 0 | - | 4.96 | 100,977 |
| Countries of Africa with an Empty Map | 0 | - | 5.00 | 242,058 |
| All First-Level Subdivisions of Africa on a Map | 0 | - | 4.92 | 32,855 |
| Australian States and Territories | 0 | - | 4.96 | 141,150 |
| Australian Immigration by Country | 0 | - | 4.81 | 77,076 |
| Australia True or False | 0 | - | 4.87 | 56,588 |
| Flags of North and South America | 0 | - | 4.99 | 368,800 |
| Latin American Countries Map Quiz | 0 | - | 4.97 | 128,534 |
| South America Map Quiz | 0 | - | 5.00 | 1,542,748 |
| Paraguay... or Uruguay? | 0 | - | 4.55 | 26,619 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,014,670 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,025 |
| U.S. History for Dummies | 0 | - | 4.47 | 82,609 |
| Canada Provinces and Territories | 0 | - | 5.00 | 338,894 |
| Canada Provinces Map Quiz | 0 | - | 4.99 | 636,902 |
| Straight Shot to Antarctica | 0 | - | 4.94 | 42,594 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,123 |
| European Countries Ending in "IA" | 0 | - | 4.96 | 67,630 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,263 |
| Sahel Countries on a Map | 0 | - | 4.99 | 21,050 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,230,700 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,321,729 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 191,931 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 150,517 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 216,883 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 86,631 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 86,974 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 308,586 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 168,800 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 67,954 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,498 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,369 |
| Slavic Countries | 0 | - | 4.96 | 111,046 |
| French History Multiple Choice | 0 | - | 4.55 | 32,909 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,125 |
| History of Germany | 0 | - | 4.39 | 52,670 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 73,072 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,495 |
| Figures from Greek Mythology | 0 | - | 4.91 | 185,429 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,585 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,737 |
| Roman Names for Places | 0 | - | 4.62 | 57,968 |
| Byzantine History | 0 | - | 4.91 | 28,665 |
| History of Spain | 0 | - | 4.29 | 21,022 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,061 |
| Counties of England | 0 | - | 4.97 | 790,868 |
| Anglo-Saxon Kingdoms of England | 0 | - | 4.60 | 25,706 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,650 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.78 | 20,092 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,382 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,002 |
