| Two Letter Roman Numerals | 0 | - | 4.97 | 56,672 |
| Olympian Gods Quiz | 0 | - | 4.96 | 504,828 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 440,785 |
| Byzantine History | 0 | - | 4.91 | 29,068 |
| Byzantine Emperors | 0 | - | 4.93 | 14,680 |
| Count in Roman Numerals - 30 Second Sprint | 0 | - | 4.27 | 104,238 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,748 |
| Roman Emperors | 0 | - | 4.95 | 121,561 |
| Famous Ancient Romans | 0 | - | 4.70 | 85,876 |
| Roman History Vocabulary | 0 | - | 4.41 | 57,755 |
| Modern-Day Countries of the Roman Empire on a Map | 0 | - | 4.99 | 127,169 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 21,103 |
| Figures from Greek Mythology | 0 | - | 4.92 | 194,901 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,546 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,679 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 86,323 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 66,144 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.97 | 72,105 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,807 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.89 | 114,700 |
| Ancient Greek Words | 0 | - | 4.93 | 112,760 |
| Regions of Italy | 0 | - | 4.92 | 77,368 |
| Ancient Roman Trivia #2 | 0 | - | 4.61 | 44,422 |
| Geography of the Roman Empire | 0 | - | 4.55 | 52,288 |
| Roman Names for Places | 0 | - | 4.62 | 58,828 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,734,043 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 150,525 |
| History of Italy | 0 | - | 4.55 | 32,204 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,802 |
| Roman History by Picture | 0 | - | 4.46 | 26,622 |
| Name the English Monarchs | 0 | - | 4.91 | 507,813 |
| Europe Map Quiz | 0 | - | 5.00 | 4,796,077 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 653,523 |
| Name that Greek Letter | 0 | - | 4.93 | 325,467 |
| Mythology A-Z | 0 | - | 4.31 | 37,470 |
| Countries Bordering Italy | 0 | - | 4.94 | 101,424 |
| Countries Closest to Italy | 0 | - | 4.97 | 199,839 |
| Prime Ministers of the UK | 0 | - | 4.95 | 443,534 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 431,664 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.74 | 58,854 |
| The Trojan War | 0 | - | 4.83 | 40,135 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 113,400 |
| Countries Italy Declared War On | 0 | - | 4.77 | 50,967 |
| Countries that Beat Italy | 0 | - | 4.85 | 55,356 |
| The Life of Julius Caesar | 0 | - | 4.39 | 39,204 |
| Seven Hills of Rome | 0 | - | 4.70 | 9,278 |
| Ultimate Harry Potter Name Game | 0 | - | 4.94 | 495,083 |
| Countries That Use the Euro | 0 | - | 4.95 | 107,432 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 366,769 |
| 10 Easternmost Countries in Europe | 0 | - | 4.87 | 117,655 |
| The Only European Country ... | 0 | - | 4.91 | 219,860 |
| European Countries NOT in NATO | 0 | - | 4.91 | 62,971 |
| Roman to Greek God | 0 | - | 4.52 | 123,595 |
| Biggest Roman Empire Countries | 0 | - | 4.87 | 102,484 |
| Countries Closest to Spain A-Z | 0 | - | 4.99 | 108,994 |
| Tolkien's Middle Earth Map Quiz | 0 | - | 4.92 | 38,346 |
| Name Every Beatles Song | 0 | - | 4.97 | 239,011 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 293,087 |
| People Buried at Westminster Abbey | 0 | - | 4.67 | 14,349 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,263,030 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,337,914 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 193,877 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 152,619 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 221,519 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,972 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 313,388 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 176,878 |
| Countries of Europe After World War II | 0 | - | 4.99 | 189,769 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 157,835 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 90,472 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,981 |
| Slavic Countries | 0 | - | 4.96 | 112,591 |
| History of Russia Quiz | 0 | - | 4.47 | 32,033 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,685 |
| Things with Names from Classical Mythology | 0 | - | 4.28 | 88,447 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,869 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,490 |
| Counties of England | 0 | - | 4.97 | 804,938 |
| Invasions of Great Britain | 0 | - | 4.51 | 60,164 |
| Lord of the Rings Decoder | 0 | - | 4.61 | 42,850 |
| Places Where Winston Churchill Said We Would Fight the Nazis | 0 | - | 4.57 | 14,661 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 363,212 |
| Champions League Winners | 0 | - | 4.92 | 1,018,985 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 104,727 |
| Prime Ministers of Australia | 0 | - | 4.51 | 32,274 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 99,326 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 194,158 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 128,059 |
| European Diaspora - Top 11 Countries | 0 | - | 4.88 | 97,048 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 138,827 |
| Three Band Flags of Europe | 0 | - | 4.98 | 195,009 |
| Pixelated Europe Map | 0 | - | 4.88 | 123,744 |
| Monarchies of Europe | 0 | - | 4.90 | 99,113 |
| European Countries with One Border | 0 | - | 4.97 | 184,144 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 180,856 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 236,583 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 279,509 |
| European Geography By Letter - B #2 | 0 | - | 4.87 | 89,434 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 169,448 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 265,744 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 116,230 |
| Russia Country Quiz | 0 | - | 4.83 | 115,541 |
| Federal Subjects of Russia | 0 | - | 4.95 | 150,097 |
| Countries That Border Russia | 0 | - | 4.98 | 465,162 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,888 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,643 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.85 | 35,689 |
| History of Austria | 0 | - | 4.70 | 17,995 |
| Andorra Country Quiz | 0 | - | 4.91 | 32,042 |
| Regions of France Map Quiz | 0 | - | 4.97 | 145,903 |
| France Cities Map Quiz | 0 | - | 4.96 | 168,285 |
| Departments of France | 0 | - | 4.93 | 55,518 |
| Geography of the French Empire | 0 | - | 4.45 | 27,245 |
| The French Revolution | 0 | - | 4.47 | 24,178 |
| Countries Bordering France | 0 | - | 4.83 | 405,579 |
| History of France | 0 | - | 4.61 | 57,788 |
| Germany Country Quiz | 0 | - | 4.82 | 159,204 |
| States of Germany Map Quiz | 0 | - | 4.92 | 134,102 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 127,341 |
| States of Germany | 0 | - | 4.95 | 155,096 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,584 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,880 |
| Countries Bordering Germany | 0 | - | 4.99 | 372,425 |
| Countries of the German Empire | 0 | - | 4.51 | 38,334 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,310 |
| Geography of Ancient Greece | 0 | - | 4.69 | 32,083 |
| Italy Country Quiz | 0 | - | 4.77 | 124,302 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 153,321 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,190 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,989 |
| The Vikings! | 0 | - | 4.46 | 28,434 |
| The Portuguese Empire | 0 | - | 4.58 | 12,120 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,672 |
| Regions of Spain Quiz | 0 | - | 4.91 | 115,716 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 187,115 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,979 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,712 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 119,170 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,502 |
| Countries the UK Declared War On | 0 | - | 4.55 | 123,431 |
| Geography of the British Empire | 0 | - | 4.48 | 39,895 |
| Medieval English History | 0 | - | 4.53 | 43,703 |
| Countries "Ruled" by King Charles III | 0 | - | 4.78 | 82,934 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,881 |
| England or Wales? | 0 | - | 4.94 | 46,114 |
| Name the Popes Quiz | 0 | - | 4.47 | 139,162 |
| Countries of the Popes | 0 | - | 4.78 | 128,967 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 132,650 |
| Asian Countries with the Most Christians | 0 | - | 4.86 | 98,236 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,782 |
| African Countries with the Most Christians | 0 | - | 4.94 | 76,277 |
| Biggest Trading Partners – Australia | 0 | - | 4.93 | 62,149 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 192,120 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,425 |
| Top 10 European Countries by Coastline | 0 | - | 4.86 | 138,869 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 66,102 |
| Category Elimination - European Countries #1 | 0 | - | 4.90 | 91,363 |
| Countries that Border Poland | 0 | - | 4.99 | 173,430 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 83,394 |
| Countries that Beat Russia | 0 | - | 4.81 | 83,832 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 103,532 |
| Countries that Border Hungary | 0 | - | 4.98 | 105,143 |
| Countries Bordering Serbia | 0 | - | 4.96 | 93,271 |
| French Geography Quiz #1 | 0 | - | 4.89 | 35,333 |
| Countries Bordering Austria | 0 | - | 4.97 | 119,101 |
| Countries that Visit France the Most | 0 | - | 4.85 | 46,258 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,619 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 47,862 |
| Countries that Beat Germany | 0 | - | 4.94 | 107,586 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 99,359 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 35,710 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 74,571 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,911 |
| Word Chain - Greek and Roman Mythology | 0 | - | 4.50 | 57,210 |
| Counties of Ireland | 0 | - | 4.92 | 197,827 |
| Italy A-Z | 0 | - | 4.49 | 58,909 |
| Italian History A-Z | 0 | - | 4.16 | 17,967 |
| History of The Netherlands | 0 | - | 4.46 | 17,583 |
| Countries Closest to Iceland | 0 | - | 4.90 | 74,367 |
| Countries that Beat Portugal | 0 | - | 4.86 | 60,061 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,344 |
| Countries Closest to Spain | 0 | - | 4.96 | 228,506 |
| Countries that Beat Spain | 0 | - | 4.94 | 63,475 |
| Real Madrid 2010s Starting XI | 0 | - | 4.90 | 69,211 |
| Arthurian Legend | 0 | - | 4.33 | 25,204 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 99,246 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 132,791 |
| Do You Even Know Anything About Shakespeare? | 0 | - | 4.56 | 34,545 |
| Basic Harry Potter Quiz | 0 | - | 4.56 | 379,953 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 32,016 |
| British History A-Z #1 | 0 | - | 4.45 | 47,377 |
| Houses of British Monarchs | 0 | - | 4.54 | 66,057 |
| English First Names of the Middle Ages | 0 | - | 4.47 | 61,186 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,370 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 38,117 |
| British History Quiz for Dummies | 0 | - | 4.70 | 79,196 |
| People in Pictures with Queen Elizabeth II | 0 | - | 4.38 | 29,538 |
| The Life of Winston Churchill | 0 | - | 4.16 | 11,884 |
| World Capitals Closest to London | 0 | - | 4.88 | 111,471 |
| 50 Busiest Air Routes from London | 0 | - | 4.87 | 97,475 |
