| South America Map Quiz | 0 | - | 5.00 | 1,549,122 |
| Countries of South America with an Empty Map | 0 | - | 4.94 | 104,886 |
| Latin American Countries Map Quiz | 0 | - | 4.97 | 129,710 |
| Central America and Caribbean Map Quiz | 0 | - | 4.89 | 901,989 |
| Central American Countries | 0 | - | 4.98 | 156,402 |
| Caribbean / Lesser Antilles Map Quiz | 0 | - | 4.99 | 148,318 |
| History of Mexico | 0 | - | 4.58 | 15,305 |
| United States Map Quiz | 0 | - | 4.98 | 4,157,234 |
| 10 Biggest American Countries by Area | 0 | - | 4.95 | 112,588 |
| Top 10 Most Populous American Countries | 0 | - | 4.97 | 144,193 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,022,543 |
| North America Map Quiz | 0 | - | 4.98 | 248,320 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,709 |
| Canada Provinces and Territories | 0 | - | 5.00 | 342,259 |
| Canada Provinces Map Quiz | 0 | - | 4.99 | 640,075 |
| Most Spoken Languages in Canada | 0 | - | 4.91 | 55,119 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,976 |
| Islands of the Galápagos | 0 | - | 4.54 | 4,782 |
| Caribbean Countries and Territories | 0 | - | 4.80 | 112,780 |
| North American Capitals - Map Quiz | 0 | - | 4.87 | 57,885 |
| Countries of North America with an Empty Map | 0 | - | 4.99 | 94,637 |
| All First-Level Subdivisions of North America on a Map | 0 | - | 4.97 | 64,047 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,451 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,392 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,431 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 73,955 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,909 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,476 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,143 |
| Countries of Europe in 1848 | 0 | - | 4.99 | 81,249 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,582 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,924 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,806 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,807 |
| American Countries With No Atlantic Coastline | 0 | - | 4.94 | 92,433 |
| States of Mexico | 0 | - | 4.95 | 175,903 |
| Mexico States Map Quiz | 0 | - | 4.85 | 104,695 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.92 | 53,851 |
| Brazil States Map Quiz | 0 | - | 4.85 | 48,016 |
| States of Brazil | 0 | - | 4.97 | 87,927 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,521 |
| American Countries on the Pacific Coast | 0 | - | 4.80 | 49,241 |
| Word Chain - South America | 0 | - | 4.51 | 23,896 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 529,324 |
| Name the English Monarchs | 0 | - | 4.91 | 502,376 |
| Mexico Cities Map Quiz | 0 | - | 4.83 | 38,501 |
| Colombia Country Quiz | 0 | - | 4.90 | 40,703 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,696,034 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,729 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,106 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 82,480 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 159,910 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 177,675 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 125,153 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,481 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 86,191 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.85 | 67,480 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 647,072 |
| Name that Greek Letter | 0 | - | 4.93 | 323,354 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 61,077 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,240 |
| Prime Ministers of the UK | 0 | - | 4.95 | 438,667 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 268,112 |
| Colonies of Africa with a Map | 0 | - | 4.78 | 54,423 |
| Famous People from South America | 0 | - | 4.15 | 21,957 |
| Countries Bordering Brazil | 0 | - | 4.96 | 131,545 |
| Countries That Visit Brazil The Most | 0 | - | 4.95 | 49,578 |
| Most-Spoken Languages of the United States | 0 | - | 4.52 | 219,816 |
| Old West History | 0 | - | 4.34 | 15,272 |
| Life of Benjamin Franklin | 0 | - | 4.24 | 6,518 |
| American Revolution - Multiple Choice | 0 | - | 4.34 | 19,925 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,727 |
| Canada Geography Trivia | 0 | - | 4.80 | 47,524 |
| Save Europeans by Guessing Countries | 0 | - | 4.83 | 213,094 |
| History of Russia Quiz | 0 | - | 4.47 | 31,913 |
| The Trojan War | 0 | - | 4.83 | 39,710 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,770 |
| History of Italy | 0 | - | 4.55 | 31,968 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,504 |
| Roman Emperors | 0 | - | 4.95 | 119,968 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,650 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,219 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,849 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,508 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 278,983 |
| Australian Capitals | 0 | - | 4.92 | 62,717 |
| Belize Country Quiz | 0 | - | 4.85 | 20,964 |
| Largest Caribbean Islands | 0 | - | 4.07 | 16,687 |
| Saintly Islands of the Caribbean | 0 | - | 4.32 | 24,027 |
| Saint Vincent and the Grenadines Country Quiz | 0 | - | 4.88 | 19,208 |
| Territories of the United States | 0 | - | 4.79 | 52,377 |
| Five Biggest Immigrant Groups by Decade in the US | 0 | - | 4.79 | 39,651 |
| Most Mentioned Enemies of the USA | 0 | - | 4.77 | 175,412 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 52,170 |
| Name a Valid Answer - United States #1 | 0 | - | 4.61 | 93,957 |
| New York City Geography | 0 | - | 4.42 | 33,090 |
| Canada Immigration by Country | 0 | - | 4.51 | 62,580 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,097 |
| Official European Union Languages | 0 | - | 4.97 | 238,426 |
| European Countries in their Native Language | 0 | - | 4.99 | 157,794 |
| Europe Map Quiz | 0 | - | 5.00 | 4,761,123 |
| Olympian Gods Quiz | 0 | - | 4.96 | 500,569 |
| Ancient Greek Words | 0 | - | 4.93 | 111,543 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 125,870 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,141 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,680 |
| Countries by Founding Story | 0 | - | 4.95 | 77,168 |
| Independence from Whom | 0 | - | 4.99 | 211,606 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,905 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,454 |
| History of India | 0 | - | 4.62 | 21,418 |
| Africa Map Quiz | 0 | - | 5.00 | 2,117,222 |
| History of South Africa | 0 | - | 4.60 | 17,683 |
| Oceania Map Quiz | 0 | - | 4.98 | 641,849 |
| Dominica Country Quiz | 0 | - | 4.81 | 19,827 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 426,332 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 381,458 |
| U.S. History Multiple Choice #2 | 0 | - | 4.32 | 25,065 |
| U.S. History Multiple Choice #1 | 0 | - | 4.31 | 22,238 |
| U.S. History Multiple Choice #4 | 0 | - | 4.26 | 25,584 |
| Native American Tribes in the US | 0 | - | 4.72 | 25,521 |
| U.S. History Multiple Choice #5 | 0 | - | 4.26 | 11,549 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 428,049 |
| History of Austria | 0 | - | 4.70 | 17,859 |
| Geography of the French Empire | 0 | - | 4.45 | 27,054 |
| The French Revolution | 0 | - | 4.46 | 23,927 |
| History of France | 0 | - | 4.59 | 56,941 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 74,080 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 436,917 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,110 |
| The Vikings! | 0 | - | 4.46 | 28,341 |
| The Portuguese Empire | 0 | - | 4.58 | 12,062 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,343 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,434 |
| Geography of the British Empire | 0 | - | 4.48 | 39,665 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,447,986 |
| Asia Map Quiz | 0 | - | 4.99 | 916,248 |
| History of Iran | 0 | - | 4.66 | 16,353 |
| History of China | 0 | - | 4.37 | 57,163 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.69 | 55,432 |
| Countries of Africa | 0 | - | 5.00 | 2,535,151 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 46,784 |
| African East Coast | 0 | - | 4.96 | 96,000 |
| Western Africa Map Quiz | 0 | - | 4.97 | 73,819 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 50,653 |
| Australia Map Quiz | 0 | - | 4.95 | 344,498 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,922 |
| Largest Land Animals of the Americas | 0 | - | 4.39 | 20,265 |
| Pixelated Americas Map | 0 | - | 4.39 | 47,152 |
| Mexico Country Quiz | 0 | - | 4.49 | 72,404 |
| South American Geography Quiz #2 | 0 | - | 4.61 | 39,335 |
| South American Geography Quiz #1 | 0 | - | 4.62 | 32,575 |
| Argentina Country Quiz | 0 | - | 4.53 | 57,476 |
| Brazil Country Quiz | 0 | - | 4.52 | 101,777 |
| Brazil Cities Map Quiz | 0 | - | 4.62 | 36,622 |
| Chile Country Quiz | 0 | - | 4.77 | 40,038 |
| Ecuador Country Quiz | 0 | - | 4.60 | 31,846 |
| Peru Country Quiz | 0 | - | 4.54 | 48,649 |
| U.S. Federal Holidays | 0 | - | 4.33 | 99,455 |
| American Inventions #1 | 0 | - | 3.63 | 31,500 |
| American Inventions #2 | 0 | - | 3.93 | 15,863 |
| Top U.S. Cash Crops | 0 | - | 4.39 | 62,293 |
| Recommended Childhood Vaccines for Americans | 0 | - | 4.42 | 14,707 |
| Things Named For People #2 - U.S. Centric | 0 | - | 4.21 | 52,628 |
| 75 Americans Named John | 0 | - | 4.41 | 23,900 |
| Largest Asian-American Ethnic Groups | 0 | - | 4.12 | 41,001 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 191,689 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,265 |
| U.S. States with the Most Expensive Home Prices | 0 | - | 4.48 | 99,634 |
| U.S. States with the Cheapest Home Prices | 0 | - | 4.70 | 33,024 |
| Top 10 Most African-American U.S. States | 0 | - | 4.46 | 74,644 |
| Top 10 Most Asian U.S. States | 0 | - | 4.80 | 75,170 |
| Top 10 Most Obese U.S. States | 0 | - | 4.54 | 81,366 |
| Top 10 Least Obese U.S. States | 0 | - | 4.75 | 73,664 |
| Top 10 Least-Educated U.S. States | 0 | - | 4.43 | 90,856 |
| Top 10 Most-Educated U.S. States | 0 | - | 4.48 | 84,813 |
| U.S. States with the Highest Rates of Homelessness | 0 | - | 4.43 | 52,399 |
| Top 10 Most White U.S. States | 0 | - | 4.49 | 82,520 |
| Top 10 Most German U.S. States | 0 | - | 4.48 | 59,960 |
| Slowest Growing U.S. States Since 1960 | 0 | - | 4.43 | 46,888 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,506 |
| Canadian Geography on the Map | 0 | - | 4.55 | 26,323 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 212,143 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,635 |
| Countries That Use the Euro | 0 | - | 4.95 | 104,914 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 364,337 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,966 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 115,145 |
| The Only European Country ... | 0 | - | 4.91 | 216,478 |
| European Countries NOT in NATO | 0 | - | 4.90 | 61,043 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,980 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,908 |
| Figures from Greek Mythology | 0 | - | 4.91 | 186,839 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,312 |
| History of The Netherlands | 0 | - | 4.46 | 17,428 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,822 |
| Medieval English History | 0 | - | 4.53 | 43,499 |
| South and Central Asia Map Quiz | 0 | - | 4.94 | 98,901 |
| Middle East Map Quiz | 0 | - | 4.99 | 1,382,683 |
| Countries that Have Controlled Mesopotamia | 0 | - | 4.15 | 15,558 |
