| Countries Invaded by the USSR | 0 | - | 4.29 | 93,824 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,728 |
| Name the English Monarchs | 0 | - | 4.92 | 500,521 |
| Monarchies of Europe | 0 | - | 4.90 | 97,769 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,638 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,947 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,069 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,561 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,724 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,705 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 126,579 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 198,239 |
| Biggest Trading Partners - Russia | 0 | - | 4.55 | 36,429 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,974 |
| Communist Countries in History | 0 | - | 4.63 | 494,218 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,678,664 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,152 |
| Europe Map Quiz | 0 | - | 5.00 | 4,748,750 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,872 |
| Top 10 Richest Countries in Europe | 0 | - | 4.90 | 148,890 |
| Biggest Trading Partners - European Union | 0 | - | 4.91 | 72,467 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 89,580 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 99,744 |
| Prime Ministers of the UK | 0 | - | 4.95 | 436,989 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,323 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 164,950 |
| Axis Occupied Countries of WWII | 0 | - | 4.99 | 228,429 |
| Countries in World War I | 0 | - | 4.88 | 227,568 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 425,288 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 363,445 |
| Russia A-Z | 0 | - | 4.46 | 27,204 |
| Countries Closest to Spain A-Z | 0 | - | 4.98 | 108,003 |
| Countries Closest to the United Kingdom A-Z | 0 | - | 4.96 | 190,436 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,704 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,507 |
| Zone 1 London Underground Stations - With a Map | 0 | - | 4.90 | 52,185 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 380,553 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 190,900 |
| Countries That Use the Euro | 0 | - | 4.95 | 104,131 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,236,353 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,324,239 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 114,463 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 192,236 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 150,775 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 217,651 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 86,835 |
| The Only European Country ... | 0 | - | 4.91 | 215,416 |
| European Countries NOT in NATO | 0 | - | 4.90 | 60,469 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 68,482 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,825 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,584 |
| Slavic Countries | 0 | - | 4.96 | 111,325 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 31,802 |
| Counties of England | 0 | - | 4.97 | 793,222 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,749 |
| British History A-Z #1 | 0 | - | 4.45 | 46,329 |
| Places Where Winston Churchill Said We Would Fight the Nazis | 0 | - | 4.57 | 14,583 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,939 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 95,505 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 137,042 |
| Three Band Flags of Europe | 0 | - | 4.98 | 192,634 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,670 |
| Pixelated Europe Map | 0 | - | 4.88 | 122,318 |
| European Countries with One Border | 0 | - | 4.97 | 182,237 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 179,096 |
| Countries That Border Russia | 0 | - | 4.98 | 460,565 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,583 |
| Regions of France Map Quiz | 0 | - | 4.97 | 143,919 |
| Countries Bordering France | 0 | - | 4.83 | 401,363 |
| States of Germany Map Quiz | 0 | - | 4.91 | 132,306 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,150 |
| Countries Bordering Germany | 0 | - | 4.99 | 368,179 |
| UK Cities Map Quiz | 0 | - | 4.96 | 463,568 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 93,404 |
| Counties of England Map Quiz | 0 | - | 4.97 | 306,764 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,278 |
| English Royal Consorts | 0 | - | 4.37 | 37,283 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,167 |
| Geography of the British Empire | 0 | - | 4.48 | 39,600 |
| All UK Parliament Constituencies on a Map | 0 | - | 4.60 | 28,666 |
| Name the Popes Quiz | 0 | - | 4.47 | 137,665 |
| Countries of the Popes | 0 | - | 4.79 | 127,669 |
| Monarchies of Asia | 0 | - | 4.97 | 70,876 |
| Asian Country Superlatives | 0 | - | 4.83 | 80,686 |
| Countries in World War II | 0 | - | 4.54 | 909,146 |
| Political Movements by Country | 0 | - | 4.46 | 72,413 |
| Battle to Country | 0 | - | 4.91 | 52,995 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,416 |
| Top 10 Richest Countries in Africa | 0 | - | 4.85 | 75,592 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 119,844 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 91,871 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,806 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.93 | 82,380 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.93 | 91,528 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,873 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,029 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.49 | 11,723 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 70,963 |
| Most Guessed European Capitals | 0 | - | 4.87 | 101,386 |
| Top 10 European Countries by Coastline | 0 | - | 4.87 | 138,163 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 232,072 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 166,259 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 259,131 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 114,042 |
| European Capital Superlatives - Top 2 | 0 | - | 4.94 | 80,958 |
| Countries that Border Poland | 0 | - | 4.99 | 171,869 |
| Russia Country Quiz | 0 | - | 4.85 | 114,108 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,616 |
| Arms Exports - Russia | 0 | - | 4.48 | 25,103 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,143 |
| Countries that Border Hungary | 0 | - | 4.98 | 103,987 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,222 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,126 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,070 |
| France Cities Map Quiz | 0 | - | 4.96 | 166,144 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,729 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,022 |
| Germany Country Quiz | 0 | - | 4.82 | 157,299 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 125,679 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 95,618 |
| Counties of Ireland | 0 | - | 4.92 | 194,197 |
| Italy Country Quiz | 0 | - | 4.82 | 122,785 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 148,911 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,598 |
| Countries Bordering Italy | 0 | - | 4.94 | 100,667 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,176 |
| Countries Closest to Italy | 0 | - | 4.97 | 197,413 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 96,511 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 185,133 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 115,520 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,092 |
| Countries Closest to Spain | 0 | - | 4.96 | 226,342 |
| UK Immigration by Country | 0 | - | 4.94 | 140,462 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 139,091 |
| Countries that Visit the UK the Most | 0 | - | 4.87 | 74,735 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 129,700 |
| Medieval English History | 0 | - | 4.53 | 43,423 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,065 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,905 |
| The Reign of Queen Elizabeth II | 0 | - | 4.36 | 35,777 |
| World Capitals Closest to London | 0 | - | 4.87 | 110,107 |
| 50 Busiest Air Routes from London | 0 | - | 4.87 | 96,503 |
| Top 10 Coldest Asian Countries | 0 | - | 4.95 | 122,720 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.85 | 120,138 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.85 | 109,434 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 96,139 |
| National Founders | 0 | - | 4.40 | 83,752 |
| Important Cities in WWII | 0 | - | 4.42 | 93,244 |
| Countries with the Most Hindus | 0 | - | 4.90 | 122,711 |
| Hindu Countries | 0 | - | 4.86 | 49,883 |
| U.S. States by Governor | 0 | - | 4.43 | 18,026 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,634 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,617 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,348 |
| U.S. Presidents by Event | 0 | - | 4.58 | 34,023 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 93,403 |
| Presidential Middle Names | 0 | - | 4.41 | 59,980 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,041 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,272 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,298 |
| The American Civil War | 0 | - | 4.62 | 52,312 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 124,302 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 125,179 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,739 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,161 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,324 |
| Random European Flag to Country | 0 | - | 4.89 | 181,664 |
| Russia by Picture | 0 | - | 4.40 | 20,337 |
| Flags of Countries That Border Russia | 0 | - | 4.70 | 70,422 |
| Countries that Beat Russia | 0 | - | 4.81 | 82,315 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.86 | 96,177 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,746 |
| Moldova Country Quiz | 0 | - | 4.82 | 30,689 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,557 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 103,292 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,850 |
| Germany A-Z | 0 | - | 4.56 | 62,488 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 71,155 |
| Countries that Beat Germany | 0 | - | 4.95 | 105,911 |
| Olympian Gods Quiz | 0 | - | 4.96 | 498,767 |
| The Trojan War | 0 | - | 4.83 | 39,593 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 645,097 |
| Name that Greek Letter | 0 | - | 4.93 | 322,742 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,286 |
| Italy A-Z | 0 | - | 4.49 | 58,062 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,393 |
| Countries that Beat Italy | 0 | - | 4.85 | 54,192 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,328 |
| Roman Emperors | 0 | - | 4.95 | 119,416 |
| Countries Closest to Iceland | 0 | - | 4.89 | 73,234 |
| Countries that Beat Iceland | 0 | - | 4.81 | 42,577 |
| Countries that Beat Portugal | 0 | - | 4.86 | 59,001 |
| Biggest Trading Partners - Spain | 0 | - | 4.91 | 53,655 |
| Countries that Beat Spain | 0 | - | 4.94 | 62,701 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,211 |
| Monty Python Quotes | 0 | - | 4.88 | 42,386 |
| Ultimate Harry Potter Name Game | 0 | - | 4.94 | 492,368 |
| Anglo-Saxon Kingdoms of England | 0 | - | 4.60 | 25,727 |
| The Reign of Henry VIII | 0 | - | 4.25 | 27,690 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.78 | 20,116 |
