| Brazil States Map Quiz | 0 | - | 4.85 | 47,638 |
| States of Brazil | 0 | - | 4.97 | 87,122 |
| South America Map Quiz | 0 | - | 5.00 | 1,544,368 |
| Countries of South America with an Empty Map | 0 | - | 4.94 | 104,528 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.92 | 53,363 |
| Latin American Countries Map Quiz | 0 | - | 4.97 | 128,787 |
| Central America and Caribbean Map Quiz | 0 | - | 4.89 | 900,708 |
| States of Mexico | 0 | - | 4.95 | 174,616 |
| Mexico States Map Quiz | 0 | - | 4.84 | 104,165 |
| Central American Countries | 0 | - | 4.98 | 155,503 |
| Caribbean / Lesser Antilles Map Quiz | 0 | - | 4.99 | 146,779 |
| History of Mexico | 0 | - | 4.58 | 15,258 |
| Countries Bordering Brazil | 0 | - | 4.96 | 131,288 |
| United States Map Quiz | 0 | - | 4.98 | 4,148,136 |
| Flags of North and South America | 0 | - | 4.99 | 370,019 |
| South American Physical Geography | 0 | - | 4.58 | 18,308 |
| Belize Country Quiz | 0 | - | 4.85 | 20,876 |
| Saint Vincent and the Grenadines Country Quiz | 0 | - | 4.88 | 19,113 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,017,033 |
| Canada Provinces and Territories | 0 | - | 5.00 | 339,775 |
| Canada Provinces Map Quiz | 0 | - | 4.99 | 637,769 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,735 |
| The Only American Country ... | 0 | - | 4.92 | 121,156 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 120,717 |
| South America Capitals Quiz | 0 | - | 5.00 | 479,099 |
| Guyana Country Quiz | 0 | - | 4.49 | 22,699 |
| Venezuela Country Quiz | 0 | - | 4.50 | 30,500 |
| Paraguay Country Quiz | 0 | - | 4.53 | 25,182 |
| Bolivia Country Quiz | 0 | - | 4.63 | 26,149 |
| Suriname Country Quiz | 0 | - | 4.60 | 19,730 |
| Dominica Country Quiz | 0 | - | 4.81 | 19,743 |
| North American Capitals - Map Quiz | 0 | - | 4.87 | 57,360 |
| All First-Level Subdivisions of North America on a Map | 0 | - | 4.97 | 63,459 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,197 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,806 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,156 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 73,433 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,681 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,509 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,842 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,935 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,476 |
| Islands of the Galápagos | 0 | - | 4.54 | 4,760 |
| South American Cities on the Map | 0 | - | 4.56 | 35,305 |
| Caribbean Countries and Territories | 0 | - | 4.80 | 112,532 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 366,105 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,290 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,297 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.93 | 91,445 |
| American Countries With No Atlantic Coastline | 0 | - | 4.94 | 92,118 |
| Word Chain - South America | 0 | - | 4.51 | 23,829 |
| Brazil Country Quiz | 0 | - | 4.52 | 101,410 |
| Name the U.S. National Parks | 0 | - | 4.86 | 59,549 |
| Total United States Immigration by Country | 0 | - | 4.91 | 111,014 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 173,735 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 242,198 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,677 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 65,892 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,823 |
| Name the English Monarchs | 0 | - | 4.92 | 500,004 |
| Top 10 American Countries by Coastline | 0 | - | 4.96 | 88,187 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.93 | 81,791 |
| Colombia Country Quiz | 0 | - | 4.90 | 40,506 |
| Jamaica Country Quiz | 0 | - | 4.58 | 34,953 |
| Haiti Country Quiz | 0 | - | 4.79 | 32,456 |
| Pixelated United States Map | 0 | - | 4.89 | 93,801 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 108,982 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 91,231 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,673,196 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,749 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,046 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 117,330 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 110,908 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 112,904 |
| U.S. States with Short Names | 0 | - | 4.91 | 148,333 |
| U.S. States that Start with M | 0 | - | 4.93 | 186,568 |
| U.S. States By Population | 0 | - | 4.92 | 152,775 |
| U.S. States that Start with N | 0 | - | 4.95 | 170,871 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,158 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 82,189 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 87,940 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 63,972 |
| The Only Remaining U.S. State . . . | 0 | - | 4.92 | 65,247 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 159,518 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 177,368 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 124,852 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,317 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 85,973 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.85 | 67,190 |
| Most-Visited Countries by Canadians | 0 | - | 4.82 | 39,175 |
| Countries Closest to Canada | 0 | - | 4.90 | 197,711 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 527,670 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 644,490 |
| Name that Greek Letter | 0 | - | 4.93 | 322,498 |
| Prime Ministers of the UK | 0 | - | 4.96 | 436,537 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 267,346 |
| Colonies of Africa with a Map | 0 | - | 4.78 | 54,182 |
| Famous People from South America | 0 | - | 4.15 | 21,871 |
| Countries That Visit Brazil The Most | 0 | - | 4.95 | 49,405 |
| Countries that Beat the United States | 0 | - | 4.93 | 166,114 |
| Old West History | 0 | - | 4.33 | 15,240 |
| Life of Benjamin Franklin | 0 | - | 4.24 | 6,508 |
| American Revolution - Multiple Choice | 0 | - | 4.34 | 19,890 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,686 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,397 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,191 |
| Countries that Beat Canada | 0 | - | 4.90 | 87,110 |
| Save Europeans by Guessing Countries | 0 | - | 4.83 | 210,958 |
| History of Russia Quiz | 0 | - | 4.49 | 31,841 |
| The Trojan War | 0 | - | 4.83 | 39,557 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,139 |
| History of Italy | 0 | - | 4.55 | 31,894 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,269 |
| Roman Emperors | 0 | - | 4.95 | 119,216 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,559 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,091 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,712 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,116 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 278,129 |
| South America A-Z | 0 | - | 4.13 | 10,873 |
| El Salvador Country Quiz | 0 | - | 4.62 | 31,599 |
| Guatemala Country Quiz | 0 | - | 4.63 | 25,313 |
| Honduras Country Quiz | 0 | - | 4.52 | 23,773 |
| Nicaragua Country Quiz | 0 | - | 4.62 | 26,457 |
| Largest Caribbean Islands | 0 | - | 4.07 | 16,639 |
| Saintly Islands of the Caribbean | 0 | - | 4.32 | 23,985 |
| Antigua and Barbuda Country Quiz | 0 | - | 4.66 | 22,004 |
| Barbados Country Quiz | 0 | - | 4.78 | 19,693 |
| Territories of the United States | 0 | - | 4.79 | 52,249 |
| Five Biggest Immigrant Groups by Decade in the US | 0 | - | 4.78 | 39,484 |
| Most Mentioned Enemies of the USA | 0 | - | 4.77 | 174,962 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 51,934 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 424,937 |
| New York City Geography | 0 | - | 4.42 | 33,020 |
| History of Pennsylvania | 0 | - | 4.16 | 7,109 |
| History of Virginia | 0 | - | 4.31 | 11,573 |
| Events in U.S. History | 0 | - | 4.40 | 28,568 |
| Canada Immigration by Country | 0 | - | 4.51 | 62,366 |
| Europe Map Quiz | 0 | - | 5.00 | 4,745,194 |
| Olympian Gods Quiz | 0 | - | 4.96 | 498,323 |
| Ancient Greek Words | 0 | - | 4.93 | 111,083 |
| History of India | 0 | - | 4.61 | 21,344 |
| Africa Map Quiz | 0 | - | 5.00 | 2,110,386 |
| History of South Africa | 0 | - | 4.60 | 17,636 |
| Oceania Map Quiz | 0 | - | 4.98 | 638,404 |
| Australian Capitals | 0 | - | 4.92 | 62,656 |
| Largest Virgin Islands | 0 | - | 4.24 | 5,285 |
| Grenada Country Quiz | 0 | - | 4.62 | 18,848 |
| Saint Kitts and Nevis Country Quiz | 0 | - | 4.57 | 18,678 |
| Trinidad and Tobago Country Quiz | 0 | - | 4.61 | 22,071 |
| U.S. State Nicknames | 0 | - | 4.47 | 50,384 |
| Countries with American Expatriates | 0 | - | 4.53 | 42,516 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 40,123 |
| United States Country Quiz | 0 | - | 4.43 | 101,018 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 76,721 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 380,337 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 190,669 |
| U.S. History Multiple Choice #2 | 0 | - | 4.32 | 25,026 |
| U.S. History Multiple Choice #1 | 0 | - | 4.31 | 22,196 |
| U.S. History Multiple Choice #4 | 0 | - | 4.26 | 25,534 |
| Canada Country Quiz | 0 | - | 4.54 | 132,064 |
| Canada Cities Map Quiz | 0 | - | 4.63 | 123,861 |
| Canada A-Z | 0 | - | 4.73 | 32,717 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 68,842 |
| Official European Union Languages | 0 | - | 4.97 | 237,629 |
| European Countries in their Native Language | 0 | - | 4.99 | 157,298 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 426,506 |
| History of Austria | 0 | - | 4.70 | 17,797 |
| Geography of the French Empire | 0 | - | 4.45 | 26,998 |
| The French Revolution | 0 | - | 4.46 | 23,859 |
| History of France | 0 | - | 4.59 | 56,600 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,423 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 435,087 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,828 |
| The Vikings! | 0 | - | 4.46 | 28,283 |
| The Portuguese Empire | 0 | - | 4.58 | 12,027 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,262 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,081 |
| Geography of the British Empire | 0 | - | 4.48 | 39,580 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,443,845 |
| Asia Map Quiz | 0 | - | 4.99 | 910,755 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 59,784 |
| History of Iran | 0 | - | 4.66 | 16,305 |
| History of China | 0 | - | 4.37 | 56,908 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,557 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,415 |
| Countries by Founding Story | 0 | - | 4.95 | 76,857 |
| Independence from Whom | 0 | - | 4.99 | 210,761 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,298 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,207 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.69 | 55,307 |
| Countries of Africa | 0 | - | 5.00 | 2,520,793 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 46,241 |
| African East Coast | 0 | - | 4.96 | 95,504 |
| Western Africa Map Quiz | 0 | - | 4.97 | 73,348 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 50,189 |
| Australia Map Quiz | 0 | - | 4.94 | 343,234 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,787 |
| Pixelated Americas Map | 0 | - | 4.39 | 46,972 |
| Hispanic Last Names in the U.S. | 0 | - | 4.31 | 54,671 |
