| Two Letter Roman Numerals | 0 | - | 4.97 | 55,836 |
| Olympian Gods Quiz | 0 | - | 4.96 | 498,438 |
| Famous Ancient Romans | 0 | - | 4.70 | 85,307 |
| Ancient Greek Words | 0 | - | 4.93 | 111,103 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 435,168 |
| Roman History Vocabulary | 0 | - | 4.40 | 57,527 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,288 |
| Roman Emperors | 0 | - | 4.95 | 119,246 |
| Roman History by Picture | 0 | - | 4.46 | 26,396 |
| Biggest Roman Empire Countries | 0 | - | 4.87 | 101,607 |
| Byzantine History | 0 | - | 4.91 | 28,704 |
| Count in Roman Numerals - 30 Second Sprint | 0 | - | 4.26 | 102,034 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 73,171 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 644,652 |
| Name that Greek Letter | 0 | - | 4.93 | 322,556 |
| The Trojan War | 0 | - | 4.83 | 39,569 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,175 |
| Countries that Beat Italy | 0 | - | 4.85 | 54,126 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,745 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 125,088 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,545 |
| Countries of Europe in 1848 | 0 | - | 4.99 | 75,867 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,967 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,494 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,382 |
| Regions of Italy | 0 | - | 4.92 | 75,218 |
| History of Italy | 0 | - | 4.55 | 31,900 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,631 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,790 |
| Roman Names for Places | 0 | - | 4.62 | 58,061 |
| Italy Country Quiz | 0 | - | 4.82 | 122,686 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 148,841 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,441 |
| Modern-Day Countries of the Roman Empire on a Map | 0 | - | 4.99 | 125,256 |
| Name the English Monarchs | 0 | - | 4.92 | 500,134 |
| Europe Map Quiz | 0 | - | 5.00 | 4,746,125 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.80 | 20,723 |
| Figures from Greek Mythology | 0 | - | 4.91 | 185,866 |
| Countries Bordering Italy | 0 | - | 4.94 | 100,638 |
| Countries Closest to Italy | 0 | - | 4.97 | 196,908 |
| Prime Ministers of the UK | 0 | - | 4.96 | 436,666 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 426,574 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,296 |
| Countries that Beat Germany | 0 | - | 4.95 | 105,823 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,152 |
| Seven Hills of Rome | 0 | - | 4.70 | 9,137 |
| Countries that Beat Spain | 0 | - | 4.94 | 62,661 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 363,235 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 73,259 |
| The Life of Julius Caesar | 0 | - | 4.39 | 39,018 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,083 |
| Countries Closest to Spain A-Z | 0 | - | 4.98 | 107,950 |
| Name Every Beatles Song | 0 | - | 4.97 | 235,067 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 291,142 |
| Zone 1 London Underground Stations - With a Map | 0 | - | 4.90 | 52,161 |
| Countries That Use the Euro | 0 | - | 4.95 | 103,949 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,234,728 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,323,517 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 114,327 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 192,159 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 150,708 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 217,451 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 86,762 |
| The Only European Country ... | 0 | - | 4.91 | 215,163 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 309,349 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 169,486 |
| European Countries NOT in NATO | 0 | - | 4.90 | 60,332 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,743 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,529 |
| Slavic Countries | 0 | - | 4.96 | 111,259 |
| History of Russia Quiz | 0 | - | 4.49 | 31,844 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,450 |
| Mythology A-Z | 0 | - | 4.31 | 37,105 |
| Italy A-Z | 0 | - | 4.49 | 58,021 |
| Which City in Italy? | 0 | - | 4.64 | 89,715 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,567 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,094 |
| Counties of England | 0 | - | 4.97 | 792,606 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,718 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,463 |
| People Buried at Westminster Abbey | 0 | - | 4.67 | 14,221 |
| English First Names of the Middle Ages | 0 | - | 4.47 | 60,494 |
| Places Where Winston Churchill Said We Would Fight the Nazis | 0 | - | 4.57 | 14,579 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 352,548 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,622 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 95,418 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 136,931 |
| Three Band Flags of Europe | 0 | - | 4.98 | 192,510 |
| Pixelated Europe Map | 0 | - | 4.88 | 122,241 |
| Monarchies of Europe | 0 | - | 4.90 | 97,704 |
| European Countries with One Border | 0 | - | 4.97 | 182,128 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 178,990 |
| European Geography By Letter - B #2 | 0 | - | 4.84 | 76,690 |
| Federal Subjects of Russia | 0 | - | 4.94 | 145,324 |
| Countries That Border Russia | 0 | - | 4.98 | 460,356 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,537 |
| Regions of France Map Quiz | 0 | - | 4.97 | 143,793 |
| Countries Bordering France | 0 | - | 4.83 | 401,142 |
| History of France | 0 | - | 4.59 | 56,635 |
| States of Germany Map Quiz | 0 | - | 4.91 | 132,165 |
| States of Germany | 0 | - | 4.96 | 151,093 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,517 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,104 |
| Countries Bordering Germany | 0 | - | 4.99 | 368,015 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,068 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 48,443 |
| Regions of Spain Quiz | 0 | - | 4.90 | 113,188 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,751 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 93,348 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,266 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,098 |
| Geography of the British Empire | 0 | - | 4.48 | 39,584 |
| Champions League Winners | 0 | - | 4.92 | 1,000,755 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,318 |
| Countries that Beat Australia | 0 | - | 4.92 | 92,402 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,674,268 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,793 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,642 |
| Top 10 Hottest European Countries | 0 | - | 4.89 | 126,500 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 70,934 |
| Top 10 European Countries by Coastline | 0 | - | 4.87 | 138,100 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,133 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 231,802 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 275,740 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 166,090 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 89,485 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 258,742 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 113,923 |
| Countries that Border Poland | 0 | - | 4.99 | 171,790 |
| Russia Country Quiz | 0 | - | 4.85 | 114,048 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,570 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 99,556 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,095 |
| Countries that Border Hungary | 0 | - | 4.98 | 103,933 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,191 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,066 |
| History of Austria | 0 | - | 4.70 | 17,800 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,635 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,031 |
| France Cities Map Quiz | 0 | - | 4.96 | 165,732 |
| Departments of France | 0 | - | 4.93 | 53,312 |
| Geography of the French Empire | 0 | - | 4.45 | 26,999 |
| The French Revolution | 0 | - | 4.46 | 23,862 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,699 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 71,978 |
| Countries that Beat France | 0 | - | 4.49 | 75,451 |
| French History Multiple Choice | 0 | - | 4.55 | 32,948 |
| Most Popular Baby Girls Names in Germany | 0 | - | 4.51 | 38,723 |
| Germany Country Quiz | 0 | - | 4.82 | 157,190 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 125,564 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,423 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 95,426 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,871 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,842 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,540 |
| Roman to Greek God | 0 | - | 4.52 | 122,498 |
| Counties of Ireland | 0 | - | 4.92 | 194,045 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,470 |
| Italian History A-Z | 0 | - | 4.21 | 17,627 |
| History of The Netherlands | 0 | - | 4.46 | 17,362 |
| The Vikings! | 0 | - | 4.46 | 28,287 |
| The Portuguese Empire | 0 | - | 4.58 | 12,028 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 96,430 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 185,047 |
| Countries Closest to Spain | 0 | - | 4.96 | 226,235 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,869 |
| British Geography Quiz #1 | 0 | - | 4.51 | 48,251 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 129,495 |
| Best-Selling British Musical Acts | 0 | - | 4.49 | 46,790 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,688 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,470 |
| Top 100 UK Baby Girls' Names in 1850 | 0 | - | 4.35 | 61,809 |
| Medieval English History | 0 | - | 4.53 | 43,404 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,049 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,896 |
| World Capitals Closest to London | 0 | - | 4.87 | 110,060 |
| 50 Busiest Air Routes from London | 0 | - | 4.87 | 96,009 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,620 |
| England or Wales? | 0 | - | 4.94 | 45,492 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 129,259 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 504,087 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 207,785 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,154 |
| Countries that Beat Russia | 0 | - | 4.81 | 82,252 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.86 | 96,141 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,725 |
| Moldova Country Quiz | 0 | - | 4.81 | 30,668 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,536 |
| Which City in France? | 0 | - | 4.64 | 72,859 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 46,879 |
| Random Cities Near Paris on a Map | 0 | - | 4.55 | 39,408 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,828 |
| Germany A-Z | 0 | - | 4.56 | 62,470 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 71,088 |
| Which City in Germany? | 0 | - | 4.50 | 135,823 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 34,760 |
| History of Germany | 0 | - | 4.39 | 52,726 |
| Holy Roman Empire Countries | 0 | - | 4.77 | 54,728 |
| Ancient Greek Inventions | 0 | - | 4.17 | 16,312 |
| Things with Names from Classical Mythology | 0 | - | 4.28 | 87,358 |
