| Two Letter Roman Numerals | 0 | - | 4.97 | 53,404 |
| Olympian Gods Quiz | 0 | - | 4.96 | 474,055 |
| Famous Ancient Romans | 0 | - | 4.68 | 83,330 |
| Ancient Greek Words | 0 | - | 4.92 | 106,505 |
| Byzantine History | 0 | - | 4.90 | 27,774 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 421,250 |
| Ancient Roman Trivia #1 | 0 | - | 4.83 | 75,604 |
| Roman Emperors | 0 | - | 4.96 | 110,826 |
| Biggest Roman Empire Countries | 0 | - | 4.89 | 99,286 |
| Count in Roman Numerals - 30 Second Sprint | 0 | - | 4.21 | 80,268 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 67,931 |
| Roman History by Picture | 0 | - | 4.46 | 25,740 |
| Figures from Greek Mythology | 0 | - | 4.90 | 177,214 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 144,176 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 71,329 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.94 | 58,740 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.97 | 66,492 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 52,923 |
| Regions of Italy | 0 | - | 4.91 | 69,482 |
| Ancient Roman Trivia #2 | 0 | - | 4.55 | 37,117 |
| Geography of the Roman Empire | 0 | - | 4.56 | 50,645 |
| Roman Names for Places | 0 | - | 4.68 | 56,077 |
| States of the German Confederation in 1848 | 0 | - | 4.86 | 29,836 |
| Italy Country Quiz | 0 | - | 4.81 | 117,968 |
| Regions of Italy Map Quiz | 0 | - | 4.95 | 143,581 |
| Countries Surrounding Rome | 0 | - | 4.96 | 48,464 |
| The Life of Julius Caesar | 0 | - | 4.47 | 33,254 |
| Modern-Day Countries of the Roman Empire on a Map | 0 | - | 4.99 | 120,472 |
| English Monarchs Quiz | 0 | - | 4.91 | 480,465 |
| Europe Map Quiz | 0 | - | 5.00 | 4,598,556 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 620,275 |
| Mythology A-Z | 0 | - | 4.30 | 35,929 |
| Countries Bordering Italy | 0 | - | 4.94 | 98,566 |
| Countries Closest to Italy | 0 | - | 4.97 | 191,027 |
| Prime Ministers of the UK | 0 | - | 4.96 | 418,025 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 413,067 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.70 | 56,766 |
| The Trojan War | 0 | - | 4.81 | 38,129 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.84 | 104,292 |
| History of Italy | 0 | - | 4.54 | 31,212 |
| Countries Italy Declared War On | 0 | - | 4.75 | 42,055 |
| Countries that Beat Italy | 0 | - | 4.85 | 51,700 |
| Seven Hills of Rome | 0 | - | 4.69 | 8,906 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 354,191 |
| Name that Greek Letter | 0 | - | 4.93 | 313,209 |
| Roman to Greek God | 0 | - | 4.51 | 119,312 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 116,734 |
| Countries Closest to Spain A-Z | 0 | - | 4.98 | 105,002 |
| Beatles Songs Quiz | 0 | - | 4.96 | 225,454 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 284,904 |
| Zone 1 London Underground Stations - With a Map | 0 | - | 4.89 | 50,211 |
| Countries That Use the Euro | 0 | - | 4.93 | 77,753 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,148,402 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,282,127 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 106,564 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 186,999 |
| 10 Westernmost Countries in Europe | 0 | - | 4.95 | 146,487 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 206,394 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.84 | 41,056 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 83,901 |
| The Only European Country ... | 0 | - | 4.91 | 201,228 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 300,883 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 150,354 |
| European Countries NOT in NATO | 0 | - | 4.88 | 52,493 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 84,040 |
| Eastern Europe Map Quiz | 0 | - | 4.90 | 122,909 |
| Slavic Countries | 0 | - | 4.96 | 107,626 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 103,871 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.80 | 20,024 |
| Italy A-Z | 0 | - | 4.47 | 42,741 |
| Geography of the Dutch Empire | 0 | - | 4.68 | 33,768 |
| Countries of the Spanish Empire | 0 | - | 4.51 | 76,381 |
| Counties of England | 0 | - | 4.97 | 759,751 |
| Invasions of Great Britain | 0 | - | 4.51 | 58,311 |
| People Buried at Westminster Abbey | 0 | - | 4.67 | 13,908 |
| Places Where Winston Churchill Said We Would Fight the Nazis | 0 | - | 4.56 | 14,282 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 330,198 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 91,295 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 131,418 |
| Three Band Flags of Europe | 0 | - | 4.97 | 185,273 |
| Pixelated Europe Map | 0 | - | 4.88 | 117,620 |
| Monarchies of Europe | 0 | - | 4.89 | 94,071 |
| European Countries with One Border | 0 | - | 4.97 | 176,808 |
| European Countries with the Fewest Borders | 0 | - | 4.98 | 173,403 |
| European Geography By Letter - B #2 | 0 | - | 4.81 | 66,487 |
| Federal Subjects of Russia | 0 | - | 4.94 | 133,226 |
| Countries That Border Russia | 0 | - | 4.98 | 448,758 |
| Countries Formerly in Yugoslavia | 0 | - | 4.96 | 120,756 |
| Regions of France Map Quiz | 0 | - | 4.96 | 137,949 |
| Countries Bordering France | 0 | - | 4.87 | 377,428 |
| History of France Quiz | 0 | - | 4.56 | 41,947 |
| States of Germany Map Quiz | 0 | - | 4.91 | 127,858 |
| States of Germany | 0 | - | 4.95 | 140,823 |
| Germany Immigration by Country | 0 | - | 4.86 | 76,831 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 25,346 |
| Countries Bordering Germany | 0 | - | 4.99 | 358,410 |
| Things with Names from Classical Mythology | 0 | - | 4.27 | 85,302 |
| Counties of Ireland | 0 | - | 4.90 | 178,589 |
| Embarrassing Chapters in Italian History | 0 | - | 4.23 | 11,764 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 35,720 |
| Regions of Spain Quiz | 0 | - | 4.89 | 106,307 |
| Cantons of Switzerland | 0 | - | 4.97 | 46,433 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 90,333 |
| Wives of King Henry VIII | 0 | - | 4.55 | 52,604 |
| Countries the UK Declared War On | 0 | - | 4.61 | 118,755 |
| Geography of the British Empire | 0 | - | 4.51 | 38,713 |
| Champions League Winners | 0 | - | 4.92 | 959,788 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 101,763 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,495,655 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 184,666 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 188,688 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 122,831 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 69,499 |
| Top 10 European Countries by Coastline | 0 | - | 4.88 | 135,380 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 62,133 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 220,669 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 265,801 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 157,679 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 84,524 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 240,503 |
| Name a Valid European Country #2 | 0 | - | 4.92 | 93,570 |
| Countries that Border Poland | 0 | - | 4.99 | 167,355 |
| Russia Country Quiz | 0 | - | 4.84 | 110,381 |
| History of Russia Quiz | 0 | - | 4.48 | 31,267 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 80,420 |
| Countries With the Most Russian Speakers | 0 | - | 4.95 | 64,563 |
| Countries that Border Hungary | 0 | - | 4.98 | 101,698 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.83 | 33,803 |
| Countries Bordering Serbia | 0 | - | 4.96 | 89,047 |
| History of Austria | 0 | - | 4.69 | 17,293 |
| French Geography Quiz #1 | 0 | - | 4.88 | 33,425 |
| Countries Bordering Austria | 0 | - | 4.97 | 115,234 |
| France Cities Map Quiz | 0 | - | 4.95 | 160,098 |
| Departments of France | 0 | - | 4.90 | 46,437 |
| Geography of the French Empire | 0 | - | 4.51 | 26,340 |
| The French Revolution | 0 | - | 4.45 | 23,040 |
| Countries that Visit France the Most | 0 | - | 4.83 | 43,290 |
| Countries Closest to Metropolitan France | 0 | - | 4.88 | 70,005 |
| French History Multiple Choice | 0 | - | 4.55 | 32,052 |
| Germany Country Quiz | 0 | - | 4.82 | 151,622 |
| Germany Cities Map Quiz | 0 | - | 4.86 | 121,427 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.42 | 22,967 |
| Countries With the Most German Speakers | 0 | - | 4.85 | 60,885 |
| Ancient Greek Trivia | 0 | - | 4.61 | 65,647 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.57 | 62,567 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 40,584 |
| History of Ireland Quiz | 0 | - | 4.44 | 20,425 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 146,930 |
| Italian History A-Z | 0 | - | 4.17 | 9,403 |
| History of The Netherlands | 0 | - | 4.45 | 16,753 |
| The Vikings! | 0 | - | 4.46 | 27,907 |
| The Portuguese Empire | 0 | - | 4.54 | 11,774 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 93,126 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 179,749 |
| Geography of the Spanish Empire | 0 | - | 4.48 | 36,448 |
| Countries Closest to Spain | 0 | - | 4.95 | 219,196 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 111,143 |
| Counties of the UK and Ireland | 0 | - | 4.97 | 121,414 |
| Houses of British Monarchs | 0 | - | 4.52 | 63,886 |
| Top 100 UK Baby Girls' Names in 1850 | 0 | - | 4.34 | 59,138 |
| Medieval English History | 0 | - | 4.53 | 42,579 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 54,100 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,272 |
| World Capitals Closest to London | 0 | - | 4.89 | 98,676 |
| 50 Busiest Air Routes from London | 0 | - | 4.86 | 93,075 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 16,817 |
| England or Wales? | 0 | - | 4.94 | 43,735 |
| All UEFA Champions League Teams Ever | 0 | - | 4.83 | 122,709 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.70 | 11,519 |
| Countries that Beat Russia | 0 | - | 4.83 | 78,615 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.85 | 93,852 |
| Moldova Country Quiz | 0 | - | 4.81 | 29,521 |
| Andorra Country Quiz | 0 | - | 4.89 | 30,263 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 44,371 |
| The Reign of Napoleon | 0 | - | 4.54 | 37,776 |
| Germany A-Z | 0 | - | 4.56 | 60,879 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 68,436 |
| Countries that Beat Germany | 0 | - | 4.95 | 101,231 |
| Country Quiz on a Map - Germany | 0 | - | 4.94 | 32,183 |
| History of Germany | 0 | - | 4.38 | 51,728 |
| Holy Roman Empire Countries | 0 | - | 4.78 | 54,093 |
| Word Chain - Greek and Roman Mythology | 0 | - | 4.52 | 54,367 |
| Which City in Italy? | 0 | - | 4.54 | 76,715 |
| Greenland Country Quiz | 0 | - | 4.83 | 34,896 |
| Countries Closest to Iceland | 0 | - | 4.88 | 69,389 |
| Countries that Beat Iceland | 0 | - | 4.81 | 40,689 |
| Countries that Beat Portugal | 0 | - | 4.87 | 56,235 |
| Biggest Trading Partners - Spain | 0 | - | 4.91 | 52,647 |
| Countries that Beat Spain | 0 | - | 4.94 | 60,748 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 95,390 |
| Biggest Trading Partners – United Kingdom | 0 | - | 4.92 | 76,746 |
| Roald Dahl Books | 0 | - | 4.44 | 33,545 |
| Shakespearean Phrases | 0 | - | 4.56 | 35,762 |
| Do You Even Know Anything About Shakespeare? | 0 | - | 4.56 | 33,556 |
| Ultimate Harry Potter Name Game | 0 | - | 4.96 | 480,177 |
| Middle Earth Geography | 0 | - | 4.56 | 38,734 |
| Lord of the Rings Trivia | 0 | - | 4.52 | 78,968 |
| Members of the Fellowship of the Ring | 0 | - | 4.74 | 44,763 |
| Imagine Lyrics | 0 | - | 4.54 | 42,001 |
| A Quiz About The Beatles | 0 | - | 4.55 | 46,089 |
