| Two Letter Roman Numerals | 0 | - | 4.97 | 56,569 |
| Olympian Gods Quiz | 0 | - | 4.96 | 504,174 |
| Famous Ancient Romans | 0 | - | 4.70 | 85,818 |
| Roman History Vocabulary | 0 | - | 4.41 | 57,735 |
| Ancient Greek Words | 0 | - | 4.93 | 112,600 |
| Byzantine History | 0 | - | 4.91 | 29,036 |
| Byzantine Emperors | 0 | - | 4.93 | 14,640 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 440,176 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,651 |
| Roman Emperors | 0 | - | 4.95 | 121,353 |
| Biggest Roman Empire Countries | 0 | - | 4.87 | 102,413 |
| Count in Roman Numerals - 30 Second Sprint | 0 | - | 4.27 | 104,087 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 75,521 |
| Roman History by Picture | 0 | - | 4.46 | 26,605 |
| Countries Bordering Serbia | 0 | - | 4.96 | 93,166 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 20,997 |
| Figures from Greek Mythology | 0 | - | 4.91 | 189,085 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,499 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,496 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 85,826 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,931 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.97 | 71,962 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,679 |
| Regions of Italy | 0 | - | 4.92 | 77,200 |
| History of Italy | 0 | - | 4.55 | 32,169 |
| Ancient Roman Trivia #2 | 0 | - | 4.61 | 44,345 |
| Geography of the Roman Empire | 0 | - | 4.55 | 52,247 |
| Roman Names for Places | 0 | - | 4.62 | 58,758 |
| Russia Country Quiz | 0 | - | 4.83 | 115,394 |
| Countries That Border Russia | 0 | - | 4.98 | 464,743 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 150,353 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,763 |
| Modern-Day Countries of the Roman Empire on a Map | 0 | - | 4.99 | 126,980 |
| Name the English Monarchs | 0 | - | 4.91 | 507,091 |
| Europe Map Quiz | 0 | - | 5.00 | 4,791,427 |
| Countries that Border Poland | 0 | - | 4.99 | 173,281 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 103,111 |
| Serbia Country Quiz | 0 | - | 4.44 | 35,241 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 652,586 |
| Name that Greek Letter | 0 | - | 4.93 | 325,162 |
| Mythology A-Z | 0 | - | 4.31 | 37,430 |
| Countries Bordering Italy | 0 | - | 4.94 | 101,327 |
| Countries Closest to Italy | 0 | - | 4.97 | 199,550 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,962 |
| Prime Ministers of the UK | 0 | - | 4.95 | 442,868 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 431,212 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,789 |
| Countries that Beat Russia | 0 | - | 4.81 | 83,703 |
| The Trojan War | 0 | - | 4.83 | 40,031 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 113,099 |
| Countries Italy Declared War On | 0 | - | 4.74 | 47,559 |
| Countries that Beat Italy | 0 | - | 4.85 | 55,246 |
| Seven Hills of Rome | 0 | - | 4.70 | 9,272 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 366,459 |
| Roman to Greek God | 0 | - | 4.52 | 123,407 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 127,758 |
| The Life of Julius Caesar | 0 | - | 4.39 | 39,192 |
| Countries Closest to Spain A-Z | 0 | - | 4.99 | 108,896 |
| Name Every Beatles Song | 0 | - | 4.97 | 238,568 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 292,932 |
| Zone 1 London Underground Stations - With a Map | 0 | - | 4.90 | 52,821 |
| Premier League Relegated Teams | 0 | - | 4.81 | 128,018 |
| Countries That Use the Euro | 0 | - | 4.95 | 107,080 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,260,225 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,336,704 |
| 10 Easternmost Countries in Europe | 0 | - | 4.87 | 117,390 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 193,712 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 152,475 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 221,111 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,867 |
| The Only European Country ... | 0 | - | 4.91 | 219,397 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 313,014 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 176,268 |
| European Countries NOT in NATO | 0 | - | 4.91 | 62,736 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 90,307 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,869 |
| Slavic Countries | 0 | - | 4.96 | 112,466 |
| History of Russia Quiz | 0 | - | 4.47 | 32,012 |
| Russian History A-Z | 0 | - | 4.35 | 32,275 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.89 | 114,155 |
| Italy A-Z | 0 | - | 4.49 | 58,814 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,839 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,456 |
| Counties of England | 0 | - | 4.97 | 803,774 |
| Invasions of Great Britain | 0 | - | 4.51 | 60,124 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,833 |
| People Buried at Westminster Abbey | 0 | - | 4.67 | 14,336 |
| Places Where Winston Churchill Said We Would Fight the Nazis | 0 | - | 4.57 | 14,654 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 362,294 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 99,065 |
| European Diaspora - Top 11 Countries | 0 | - | 4.88 | 96,940 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 138,661 |
| Three Band Flags of Europe | 0 | - | 4.98 | 194,742 |
| Pixelated Europe Map | 0 | - | 4.88 | 123,569 |
| Monarchies of Europe | 0 | - | 4.90 | 98,987 |
| European Countries with One Border | 0 | - | 4.97 | 183,950 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 180,665 |
| European Geography By Letter - B #2 | 0 | - | 4.86 | 89,028 |
| Albania Country Quiz | 0 | - | 4.54 | 39,281 |
| Federal Subjects of Russia | 0 | - | 4.95 | 149,805 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,541 |
| Regions of France Map Quiz | 0 | - | 4.97 | 145,759 |
| Countries Bordering France | 0 | - | 4.83 | 405,191 |
| History of France | 0 | - | 4.61 | 57,688 |
| States of Germany Map Quiz | 0 | - | 4.92 | 133,925 |
| States of Germany | 0 | - | 4.95 | 154,799 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,763 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,645 |
| Countries Bordering Germany | 0 | - | 4.99 | 372,095 |
| Things with Names from Classical Mythology | 0 | - | 4.28 | 88,244 |
| Italy Country Quiz | 0 | - | 4.77 | 124,148 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,173 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,865 |
| Regions of Spain Quiz | 0 | - | 4.90 | 115,489 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,850 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,586 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,481 |
| Countries the UK Declared War On | 0 | - | 4.55 | 123,332 |
| Geography of the British Empire | 0 | - | 4.48 | 39,862 |
| Champions League Winners | 0 | - | 4.92 | 1,017,277 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,729,270 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,917 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 194,009 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,900 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,385 |
| Top 10 European Countries by Coastline | 0 | - | 4.86 | 138,790 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 66,014 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 236,157 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 279,197 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 169,124 |
| Category Elimination - European Countries #1 | 0 | - | 4.90 | 91,204 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 265,095 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 116,036 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 83,326 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,804 |
| Countries that Border Hungary | 0 | - | 4.98 | 105,060 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.83 | 35,617 |
| History of Austria | 0 | - | 4.70 | 17,988 |
| French Geography Quiz #1 | 0 | - | 4.89 | 35,123 |
| Andorra Country Quiz | 0 | - | 4.91 | 31,977 |
| Countries Bordering Austria | 0 | - | 4.97 | 119,003 |
| France Cities Map Quiz | 0 | - | 4.96 | 167,921 |
| Departments of France | 0 | - | 4.93 | 55,313 |
| Geography of the French Empire | 0 | - | 4.45 | 27,225 |
| The French Revolution | 0 | - | 4.47 | 24,158 |
| Countries that Visit France the Most | 0 | - | 4.85 | 46,198 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,538 |
| French History Multiple Choice | 0 | - | 4.55 | 33,260 |
| Germany Country Quiz | 0 | - | 4.82 | 158,978 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 127,169 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,569 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 98,953 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,265 |
| Geography of Ancient Greece | 0 | - | 4.69 | 32,063 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 74,395 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,878 |
| Counties of Ireland | 0 | - | 4.92 | 197,544 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 153,156 |
| Italian History A-Z | 0 | - | 4.16 | 17,948 |
| History of The Netherlands | 0 | - | 4.46 | 17,566 |
| The Vikings! | 0 | - | 4.46 | 28,419 |
| The Portuguese Empire | 0 | - | 4.58 | 12,116 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,565 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 186,981 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,326 |
| Countries Closest to Spain | 0 | - | 4.96 | 228,287 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,962 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 132,551 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,992 |
| Houses of British Monarchs | 0 | - | 4.54 | 65,999 |
| Top 100 UK Baby Girls' Names in 1850 | 0 | - | 4.32 | 62,637 |
| Medieval English History | 0 | - | 4.53 | 43,673 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,343 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 38,100 |
| World Capitals Closest to London | 0 | - | 4.88 | 111,112 |
| 50 Busiest Air Routes from London | 0 | - | 4.87 | 97,368 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,850 |
| England or Wales? | 0 | - | 4.94 | 45,999 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 132,350 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,641 |
| Poland Country Quiz | 0 | - | 4.20 | 63,786 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 166,562 |
| Countries Invaded by the USSR | 0 | - | 4.30 | 94,472 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.86 | 96,864 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 28,079 |
| Moldova Country Quiz | 0 | - | 4.82 | 31,048 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 47,755 |
| The Reign of Napoleon | 0 | - | 4.54 | 39,193 |
| Germany A-Z | 0 | - | 4.56 | 62,886 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 72,079 |
| Countries that Beat Germany | 0 | - | 4.94 | 107,430 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 35,613 |
| History of Germany | 0 | - | 4.39 | 52,991 |
| Holy Roman Empire Countries | 0 | - | 4.77 | 54,929 |
| Word Chain - Greek and Roman Mythology | 0 | - | 4.50 | 57,045 |
| Iceland... or Ireland? | 0 | - | 4.74 | 57,253 |
| Which City in Italy? | 0 | - | 4.68 | 90,615 |
| Countries Closest to Iceland | 0 | - | 4.90 | 74,235 |
| Countries that Beat Iceland | 0 | - | 4.81 | 43,274 |
| Countries that Beat Portugal | 0 | - | 4.86 | 59,950 |
