| South America Map Quiz | 0 | - | 5.00 | 1,540,349 |
| Countries of South America with an Empty Map | 0 | - | 4.94 | 104,054 |
| Latin American Countries Map Quiz | 0 | - | 4.97 | 127,961 |
| Central America and Caribbean Map Quiz | 0 | - | 4.89 | 899,520 |
| Central American Countries | 0 | - | 4.98 | 154,923 |
| Caribbean / Lesser Antilles Map Quiz | 0 | - | 4.99 | 145,602 |
| History of Mexico | 0 | - | 4.58 | 15,218 |
| United States Map Quiz | 0 | - | 4.98 | 4,139,804 |
| 10 Biggest American Countries by Area | 0 | - | 4.95 | 112,114 |
| Top 10 Most Populous American Countries | 0 | - | 4.97 | 143,081 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,010,534 |
| North America Map Quiz | 0 | - | 4.98 | 244,026 |
| Third Most Common Language by U.S. State | 0 | - | 4.89 | 113,344 |
| Canada Provinces and Territories | 0 | - | 5.00 | 337,345 |
| Canada Provinces Map Quiz | 0 | - | 4.99 | 635,365 |
| Most Spoken Languages in Canada | 0 | - | 4.91 | 54,544 |
| Islands of the Galápagos | 0 | - | 4.54 | 4,754 |
| Caribbean Countries and Territories | 0 | - | 4.80 | 112,277 |
| North American Capitals - Map Quiz | 0 | - | 4.87 | 56,870 |
| Countries of North America with an Empty Map | 0 | - | 4.99 | 93,825 |
| All First-Level Subdivisions of North America on a Map | 0 | - | 4.97 | 62,801 |
| U.S. State Border Crossings | 0 | - | 4.97 | 95,856 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,175 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 74,763 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 72,972 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,440 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,099 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 148,788 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,304 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,253 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 69,995 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 55,916 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,484 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 105,722 |
| American Countries With No Atlantic Coastline | 0 | - | 4.94 | 91,839 |
| States of Mexico | 0 | - | 4.95 | 173,048 |
| Mexico States Map Quiz | 0 | - | 4.84 | 103,686 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.92 | 52,778 |
| Brazil States Map Quiz | 0 | - | 4.85 | 47,326 |
| States of Brazil | 0 | - | 4.98 | 86,227 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,117 |
| American Countries on the Pacific Coast | 0 | - | 4.80 | 48,995 |
| Word Chain - South America | 0 | - | 4.51 | 23,755 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 526,026 |
| Name the English Monarchs | 0 | - | 4.92 | 497,414 |
| Colombia Country Quiz | 0 | - | 4.90 | 40,274 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,649,057 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,133 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 32,978 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 81,841 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 158,779 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 177,032 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 124,401 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,028 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 85,614 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.84 | 66,748 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 641,236 |
| Name that Greek Letter | 0 | - | 4.94 | 321,443 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,410 |
| Prime Ministers of the UK | 0 | - | 4.96 | 434,148 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 266,354 |
| Colonies of Africa with a Map | 0 | - | 4.77 | 53,893 |
| Famous People from South America | 0 | - | 4.15 | 21,771 |
| Countries Bordering Brazil | 0 | - | 4.96 | 130,931 |
| Countries That Visit Brazil The Most | 0 | - | 4.95 | 49,257 |
| Most-Spoken Languages of the United States | 0 | - | 4.52 | 216,322 |
| Old West History | 0 | - | 4.32 | 15,216 |
| Life of Benjamin Franklin | 0 | - | 4.24 | 6,486 |
| American Revolution - Multiple Choice | 0 | - | 4.34 | 19,840 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,634 |
| Canada Geography Trivia | 0 | - | 4.80 | 47,343 |
| Save Europeans by Guessing Countries | 0 | - | 4.84 | 209,085 |
| History of Russia Quiz | 0 | - | 4.49 | 31,772 |
| The Trojan War | 0 | - | 4.83 | 39,398 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,362 |
| History of Italy | 0 | - | 4.55 | 31,800 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 83,981 |
| Roman Emperors | 0 | - | 4.95 | 118,300 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,464 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 76,962 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,357 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 97,758 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 276,937 |
| Australian Capitals | 0 | - | 4.92 | 62,586 |
| Belize Country Quiz | 0 | - | 4.85 | 20,782 |
| Largest Caribbean Islands | 0 | - | 4.07 | 16,579 |
| Saintly Islands of the Caribbean | 0 | - | 4.32 | 23,914 |
| Saint Vincent and the Grenadines Country Quiz | 0 | - | 4.88 | 19,031 |
| Territories of the United States | 0 | - | 4.79 | 52,103 |
| Five Biggest Immigrant Groups by Decade in the US | 0 | - | 4.78 | 39,348 |
| Most Mentioned Enemies of the USA | 0 | - | 4.77 | 174,439 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 51,687 |
| Name a Valid Answer - United States #1 | 0 | - | 4.63 | 93,380 |
| New York City Geography | 0 | - | 4.42 | 32,878 |
| Canada Immigration by Country | 0 | - | 4.51 | 62,168 |
| Count to 10 in Europe: Pro | 0 | - | 4.85 | 68,526 |
| Official European Union Languages | 0 | - | 4.97 | 236,363 |
| European Countries in their Native Language | 0 | - | 4.99 | 156,605 |
| Europe Map Quiz | 0 | - | 5.00 | 4,727,714 |
| Olympian Gods Quiz | 0 | - | 4.96 | 494,862 |
| Ancient Greek Words | 0 | - | 4.92 | 110,553 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 124,071 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 92,602 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,093 |
| Countries by Founding Story | 0 | - | 4.95 | 76,453 |
| Independence from Whom | 0 | - | 4.99 | 209,495 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 130,596 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 61,942 |
| History of India | 0 | - | 4.61 | 21,265 |
| Africa Map Quiz | 0 | - | 5.00 | 2,102,888 |
| History of South Africa | 0 | - | 4.60 | 17,592 |
| Oceania Map Quiz | 0 | - | 4.98 | 634,496 |
| Dominica Country Quiz | 0 | - | 4.81 | 19,649 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 423,292 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 379,359 |
| U.S. History Multiple Choice #2 | 0 | - | 4.32 | 24,981 |
| U.S. History Multiple Choice #1 | 0 | - | 4.31 | 22,149 |
| U.S. History Multiple Choice #4 | 0 | - | 4.26 | 25,477 |
| Native American Tribes in the US | 0 | - | 4.70 | 25,251 |
| U.S. History Multiple Choice #5 | 0 | - | 4.26 | 11,476 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 424,884 |
| History of Austria | 0 | - | 4.70 | 17,736 |
| Geography of the French Empire | 0 | - | 4.48 | 26,912 |
| The French Revolution | 0 | - | 4.46 | 23,750 |
| History of France | 0 | - | 4.59 | 55,896 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,372 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 72,347 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 433,134 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,552 |
| The Vikings! | 0 | - | 4.45 | 28,235 |
| The Portuguese Empire | 0 | - | 4.54 | 11,980 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,154 |
| Countries the UK Declared War On | 0 | - | 4.61 | 121,702 |
| Geography of the British Empire | 0 | - | 4.48 | 39,462 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,438,041 |
| Asia Map Quiz | 0 | - | 4.99 | 905,921 |
| History of Iran | 0 | - | 4.65 | 16,258 |
| History of China | 0 | - | 4.37 | 56,645 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.68 | 55,130 |
| Countries of Africa | 0 | - | 5.00 | 2,504,698 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 45,725 |
| African East Coast | 0 | - | 4.96 | 94,938 |
| Western Africa Map Quiz | 0 | - | 4.97 | 72,802 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 49,724 |
| Australia Map Quiz | 0 | - | 4.94 | 342,250 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,645 |
| Largest Land Animals of the Americas | 0 | - | 4.38 | 20,189 |
| Pixelated Americas Map | 0 | - | 4.40 | 46,764 |
| Mexico Country Quiz | 0 | - | 4.49 | 71,930 |
| Mexico Cities Map Quiz | 0 | - | 4.77 | 33,305 |
| South American Geography Quiz #2 | 0 | - | 4.61 | 39,173 |
| South American Geography Quiz #1 | 0 | - | 4.73 | 32,454 |
| Argentina Country Quiz | 0 | - | 4.53 | 57,043 |
| Brazil Country Quiz | 0 | - | 4.52 | 101,007 |
| Brazil Cities Map Quiz | 0 | - | 4.62 | 36,352 |
| Chile Country Quiz | 0 | - | 4.75 | 39,693 |
| Peru Country Quiz | 0 | - | 4.54 | 48,253 |
| U.S. Federal Holidays | 0 | - | 4.33 | 99,073 |
| American Inventions #1 | 0 | - | 3.63 | 31,455 |
| American Inventions #2 | 0 | - | 3.93 | 15,821 |
| Top U.S. Cash Crops | 0 | - | 4.39 | 62,061 |
| Recommended Childhood Vaccines for Americans | 0 | - | 4.42 | 14,626 |
| Things Named For People #2 - U.S. Centric | 0 | - | 4.21 | 52,508 |
| 75 Americans Named John | 0 | - | 4.41 | 23,818 |
| Largest Asian-American Ethnic Groups | 0 | - | 4.11 | 40,769 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 189,616 |
| Play-Doh Presidents | 0 | - | 5.00 | 81,600 |
| U.S. States with the Most Expensive Home Prices | 0 | - | 4.48 | 99,271 |
| U.S. States with the Cheapest Home Prices | 0 | - | 4.70 | 32,749 |
| Top 10 Most African-American U.S. States | 0 | - | 4.46 | 74,389 |
| Top 10 Most Asian U.S. States | 0 | - | 4.80 | 74,835 |
| Top 10 Most Obese U.S. States | 0 | - | 4.54 | 81,190 |
| Top 10 Least Obese U.S. States | 0 | - | 4.75 | 73,383 |
| Top 10 Least-Educated U.S. States | 0 | - | 4.43 | 89,893 |
| Top 10 Most-Educated U.S. States | 0 | - | 4.48 | 84,259 |
| U.S. States with the Highest Rates of Homelessness | 0 | - | 4.43 | 52,126 |
| Top 10 Most White U.S. States | 0 | - | 4.49 | 81,789 |
| Top 10 Most German U.S. States | 0 | - | 4.48 | 59,519 |
| Canadian Prime Ministers | 0 | - | 4.63 | 56,973 |
| Canadian Geography on the Map | 0 | - | 4.55 | 26,177 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 209,849 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,157 |
| Countries That Use the Euro | 0 | - | 4.96 | 102,750 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 362,079 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,487 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 113,349 |
| The Only European Country ... | 0 | - | 4.91 | 213,519 |
| European Countries NOT in NATO | 0 | - | 4.87 | 59,339 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,741 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,751 |
| Figures from Greek Mythology | 0 | - | 4.91 | 184,695 |
| Countries Italy Declared War On | 0 | - | 4.75 | 42,910 |
| History of The Netherlands | 0 | - | 4.46 | 17,298 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,529 |
| Medieval English History | 0 | - | 4.53 | 43,292 |
| South and Central Asia Map Quiz | 0 | - | 4.93 | 97,327 |
| Middle East Map Quiz | 0 | - | 4.99 | 1,374,891 |
| Countries that Have Controlled Mesopotamia | 0 | - | 4.18 | 15,482 |
| Ottoman Empire Quiz | 0 | - | 4.46 | 16,996 |
| Chinese Inventions | 0 | - | 4.30 | 33,711 |
