| Brazil States Map Quiz | 0 | - | 4.86 | 48,307 |
| States of Brazil | 0 | - | 4.97 | 88,817 |
| South America Map Quiz | 0 | - | 5.00 | 1,552,366 |
| Countries of South America with an Empty Map | 0 | - | 4.94 | 105,178 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.92 | 54,276 |
| Latin American Countries Map Quiz | 0 | - | 4.97 | 130,206 |
| Central America and Caribbean Map Quiz | 0 | - | 4.89 | 903,159 |
| States of Mexico | 0 | - | 4.96 | 177,074 |
| Mexico States Map Quiz | 0 | - | 4.84 | 105,269 |
| Central American Countries | 0 | - | 4.98 | 156,888 |
| Caribbean Countries and Territories | 0 | - | 4.81 | 113,025 |
| Caribbean / Lesser Antilles Map Quiz | 0 | - | 4.99 | 149,258 |
| History of Mexico | 0 | - | 4.58 | 15,341 |
| Countries Bordering Brazil | 0 | - | 4.96 | 131,981 |
| United States Map Quiz | 0 | - | 4.98 | 4,164,692 |
| Flags of North and South America | 0 | - | 4.99 | 374,783 |
| South American Physical Geography | 0 | - | 4.58 | 18,377 |
| Belize Country Quiz | 0 | - | 4.85 | 21,024 |
| Saint Vincent and the Grenadines Country Quiz | 0 | - | 4.88 | 19,258 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,026,771 |
| Canada Provinces and Territories | 0 | - | 5.00 | 344,158 |
| Canada Provinces Map Quiz | 0 | - | 4.99 | 642,176 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,247 |
| The Only American Country ... | 0 | - | 4.92 | 121,882 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 121,345 |
| South America Capitals Quiz | 0 | - | 5.00 | 483,065 |
| Guyana Country Quiz | 0 | - | 4.50 | 22,857 |
| Venezuela Country Quiz | 0 | - | 4.51 | 30,661 |
| Paraguay Country Quiz | 0 | - | 4.54 | 25,346 |
| Bolivia Country Quiz | 0 | - | 4.63 | 26,315 |
| Suriname Country Quiz | 0 | - | 4.61 | 19,863 |
| Dominica Country Quiz | 0 | - | 4.81 | 19,877 |
| North American Capitals - Map Quiz | 0 | - | 4.88 | 58,303 |
| All First-Level Subdivisions of North America on a Map | 0 | - | 4.97 | 64,482 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,651 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,825 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,664 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 74,496 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 40,074 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,851 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 83,870 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,216 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,421 |
| Islands of the Galápagos | 0 | - | 4.54 | 4,785 |
| South American Cities on the Map | 0 | - | 4.53 | 35,480 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 367,923 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,625 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 92,461 |
| American Countries With No Atlantic Coastline | 0 | - | 4.94 | 92,616 |
| Word Chain - South America | 0 | - | 4.51 | 23,947 |
| Brazil Country Quiz | 0 | - | 4.52 | 102,055 |
| Name the U.S. National Parks | 0 | - | 4.86 | 60,173 |
| Total United States Immigration by Country | 0 | - | 4.91 | 111,963 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 174,982 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 245,114 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,968 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,463 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,137 |
| Name the English Monarchs | 0 | - | 4.91 | 504,453 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,157 |
| Top 10 American Countries by Coastline | 0 | - | 4.96 | 88,491 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.93 | 84,602 |
| Mexico Cities Map Quiz | 0 | - | 4.83 | 38,717 |
| Colombia Country Quiz | 0 | - | 4.90 | 40,838 |
| El Salvador Country Quiz | 0 | - | 4.63 | 31,790 |
| Jamaica Country Quiz | 0 | - | 4.58 | 35,172 |
| Haiti Country Quiz | 0 | - | 4.79 | 32,692 |
| Pixelated United States Map | 0 | - | 4.88 | 94,516 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 110,042 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 92,068 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,711,487 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,345 |
| Events in U.S. History | 0 | - | 4.41 | 28,731 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,144 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 118,183 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 111,796 |
| 10 Southernmost U.S. States | 0 | - | 4.89 | 113,730 |
| U.S. States with Short Names | 0 | - | 4.91 | 149,425 |
| U.S. States that Start with M | 0 | - | 4.93 | 187,745 |
| U.S. States By Population | 0 | - | 4.92 | 153,810 |
| U.S. States that Start with N | 0 | - | 4.95 | 171,802 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,633 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 82,740 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,574 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,357 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 65,836 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 160,336 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 177,981 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 125,448 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,699 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 86,476 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.85 | 67,774 |
| Most-Visited Countries by Canadians | 0 | - | 4.83 | 39,481 |
| Countries Closest to Canada | 0 | - | 4.91 | 198,680 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 530,913 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 649,569 |
| Name that Greek Letter | 0 | - | 4.93 | 324,320 |
| Prime Ministers of the UK | 0 | - | 4.95 | 440,577 |
| Famous People from South America | 0 | - | 4.15 | 22,031 |
| Countries That Visit Brazil The Most | 0 | - | 4.95 | 49,709 |
| Countries that Beat the United States | 0 | - | 4.93 | 167,941 |
| Old West History | 0 | - | 4.34 | 15,288 |
| Life of Benjamin Franklin | 0 | - | 4.24 | 6,529 |
| American Revolution - Multiple Choice | 0 | - | 4.34 | 19,962 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,752 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 102,003 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,645 |
| Countries that Beat Canada | 0 | - | 4.91 | 98,617 |
| Save Europeans by Guessing Countries | 0 | - | 4.86 | 214,956 |
| History of Russia Quiz | 0 | - | 4.47 | 31,968 |
| The Trojan War | 0 | - | 4.83 | 39,841 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,381 |
| History of Italy | 0 | - | 4.55 | 32,082 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,921 |
| Roman Emperors | 0 | - | 4.95 | 120,514 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,744 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,319 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,990 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,802 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 279,854 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 268,739 |
| Colonies of Africa with a Map | 0 | - | 4.79 | 54,582 |
| South America A-Z | 0 | - | 4.13 | 10,928 |
| Guatemala Country Quiz | 0 | - | 4.63 | 25,496 |
| Honduras Country Quiz | 0 | - | 4.52 | 23,941 |
| Nicaragua Country Quiz | 0 | - | 4.62 | 26,643 |
| Largest Caribbean Islands | 0 | - | 4.07 | 16,721 |
| Saintly Islands of the Caribbean | 0 | - | 4.32 | 24,090 |
| Antigua and Barbuda Country Quiz | 0 | - | 4.68 | 22,141 |
| Barbados Country Quiz | 0 | - | 4.78 | 19,806 |
| Territories of the United States | 0 | - | 4.80 | 52,489 |
| Five Biggest Immigrant Groups by Decade in the US | 0 | - | 4.79 | 39,760 |
| Most Mentioned Enemies of the USA | 0 | - | 4.77 | 175,766 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 52,320 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 427,285 |
| New York City Geography | 0 | - | 4.42 | 33,138 |
| History of Pennsylvania | 0 | - | 4.16 | 7,148 |
| History of Virginia | 0 | - | 4.31 | 11,615 |
| Canada Immigration by Country | 0 | - | 4.51 | 62,738 |
| Europe Map Quiz | 0 | - | 5.00 | 4,774,147 |
| Olympian Gods Quiz | 0 | - | 4.96 | 502,210 |
| Ancient Greek Words | 0 | - | 4.93 | 112,027 |
| History of South Africa | 0 | - | 4.60 | 17,727 |
| Oceania Map Quiz | 0 | - | 4.98 | 655,608 |
| Australian Capitals | 0 | - | 4.92 | 62,774 |
| Largest Virgin Islands | 0 | - | 4.24 | 5,306 |
| Grenada Country Quiz | 0 | - | 4.62 | 18,967 |
| Saint Kitts and Nevis Country Quiz | 0 | - | 4.57 | 18,802 |
| Trinidad and Tobago Country Quiz | 0 | - | 4.61 | 22,219 |
| U.S. State Nicknames | 0 | - | 4.47 | 50,624 |
| Countries with American Expatriates | 0 | - | 4.53 | 42,622 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 40,223 |
| United States Country Quiz | 0 | - | 4.43 | 101,809 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 76,981 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 382,499 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 192,758 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,536 |
| U.S. History Multiple Choice #2 | 0 | - | 4.32 | 25,095 |
| U.S. History Multiple Choice #1 | 0 | - | 4.31 | 22,265 |
| U.S. History Multiple Choice #4 | 0 | - | 4.24 | 25,628 |
| Canada Country Quiz | 0 | - | 4.54 | 132,737 |
| Canada Cities Map Quiz | 0 | - | 4.64 | 124,406 |
| Canada A-Z | 0 | - | 4.73 | 32,906 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,393 |
| Official European Union Languages | 0 | - | 4.97 | 239,065 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,227 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 429,461 |
| History of Austria | 0 | - | 4.70 | 17,923 |
| Geography of the French Empire | 0 | - | 4.45 | 27,167 |
| The French Revolution | 0 | - | 4.47 | 24,076 |
| History of France | 0 | - | 4.61 | 57,341 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 438,338 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,315 |
| The Vikings! | 0 | - | 4.46 | 28,374 |
| The Portuguese Empire | 0 | - | 4.58 | 12,087 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,423 |
| Countries the UK Declared War On | 0 | - | 4.55 | 122,967 |
| Geography of the British Empire | 0 | - | 4.48 | 39,767 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,450,038 |
| Asia Map Quiz | 0 | - | 4.99 | 920,516 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 60,088 |
| History of Iran | 0 | - | 4.66 | 16,390 |
| History of China | 0 | - | 4.37 | 57,372 |
| History of India | 0 | - | 4.62 | 21,467 |
| Africa Map Quiz | 0 | - | 5.00 | 2,122,898 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,575 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,906 |
| Countries by Founding Story | 0 | - | 4.95 | 77,440 |
| Independence from Whom | 0 | - | 4.99 | 212,289 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 132,865 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,644 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 51,029 |
| Australia Map Quiz | 0 | - | 4.95 | 345,376 |
| Prime Ministers of Australia | 0 | - | 4.50 | 32,064 |
| Pixelated Americas Map | 0 | - | 4.39 | 47,296 |
| Hispanic Last Names in the U.S. | 0 | - | 4.31 | 54,805 |
| Mexico Country Quiz | 0 | - | 4.49 | 72,566 |
| South American Geography Quiz #1 | 0 | - | 4.62 | 32,717 |
| Argentina Country Quiz | 0 | - | 4.53 | 57,632 |
| Brazil Cities Map Quiz | 0 | - | 4.62 | 36,739 |
