| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,670 |
| Roman Emperors | 0 | - | 4.95 | 120,452 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,297 |
| Olympian Gods Quiz | 0 | - | 4.96 | 502,071 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,804 |
| Geography of the Roman Empire | 0 | - | 4.56 | 52,002 |
| Roman Names for Places | 0 | - | 4.62 | 58,423 |
| Ancient Greek Words | 0 | - | 4.93 | 111,973 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.98 | 74,684 |
| Famous Ancient Romans | 0 | - | 4.70 | 85,582 |
| Roman History by Picture | 0 | - | 4.46 | 26,505 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 438,229 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 649,297 |
| Name that Greek Letter | 0 | - | 4.93 | 324,250 |
| Seven Hills of Rome | 0 | - | 4.70 | 9,207 |
| The Trojan War | 0 | - | 4.83 | 39,814 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,314 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 20,853 |
| The Life of Julius Caesar | 0 | - | 4.39 | 39,124 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,227 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 126,601 |
| Roman History Vocabulary | 0 | - | 4.41 | 57,657 |
| Byzantine History | 0 | - | 4.91 | 28,925 |
| Byzantine Emperors | 0 | - | 4.92 | 14,392 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,808 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 83,695 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,166 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,378 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,183 |
| Regions of Italy | 0 | - | 4.92 | 76,322 |
| History of Italy | 0 | - | 4.55 | 32,064 |
| Count in Roman Numerals - 30 Second Sprint | 0 | - | 4.27 | 103,265 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 149,739 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,625 |
| Name the English Monarchs | 0 | - | 4.91 | 504,235 |
| Europe Map Quiz | 0 | - | 5.00 | 4,773,043 |
| Figures from Greek Mythology | 0 | - | 4.91 | 187,838 |
| Countries Bordering Italy | 0 | - | 4.94 | 101,044 |
| Countries Closest to Italy | 0 | - | 4.97 | 198,402 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 61,333 |
| Countries of Iberia in History with a Map | 0 | - | 4.88 | 42,099 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,546 |
| Prime Ministers of the UK | 0 | - | 4.95 | 440,326 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 429,334 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,600 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,091 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,954 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,438 |
| Countries that Beat Italy | 0 | - | 4.85 | 54,683 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 365,184 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 73,934 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,721 |
| Biggest Roman Empire Countries | 0 | - | 4.87 | 102,041 |
| Countries Closest to Spain A-Z | 0 | - | 4.98 | 108,449 |
| Name Every Beatles Song | 0 | - | 4.97 | 237,199 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 292,153 |
| Zone 1 London Underground Stations - With a Map | 0 | - | 4.90 | 52,523 |
| Premier League Relegated Teams | 0 | - | 4.81 | 127,005 |
| European Countries Ending in "IA" | 0 | - | 4.96 | 68,629 |
| Countries That Use the Euro | 0 | - | 4.95 | 105,696 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,249,533 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,331,312 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 115,795 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 192,986 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 151,495 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 219,529 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,399 |
| The Only European Country ... | 0 | - | 4.91 | 217,566 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 311,563 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 173,507 |
| European Countries NOT in NATO | 0 | - | 4.90 | 61,693 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 89,640 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,461 |
| Slavic Countries | 0 | - | 4.96 | 111,949 |
| History of Russia Quiz | 0 | - | 4.47 | 31,960 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,703 |
| Mythology A-Z | 0 | - | 4.31 | 37,301 |
| Iceland... or Ireland? | 0 | - | 4.74 | 57,117 |
| Italy A-Z | 0 | - | 4.49 | 58,476 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,730 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,311 |
| Counties of England | 0 | - | 4.97 | 799,385 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,976 |
| Do You Even Know Anything About Shakespeare? | 0 | - | 4.57 | 34,425 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,733 |
| People Buried at Westminster Abbey | 0 | - | 4.67 | 14,280 |
| Places Where Winston Churchill Said We Would Fight the Nazis | 0 | - | 4.57 | 14,630 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 358,478 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 98,001 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 96,085 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 137,915 |
| Three Band Flags of Europe | 0 | - | 4.98 | 193,782 |
| Pixelated Europe Map | 0 | - | 4.88 | 123,039 |
| Monarchies of Europe | 0 | - | 4.90 | 98,399 |
| European Countries with One Border | 0 | - | 4.97 | 183,185 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 179,967 |
| European Geography By Letter - B #2 | 0 | - | 4.86 | 87,233 |
| Federal Subjects of Russia | 0 | - | 4.95 | 148,171 |
| Countries That Border Russia | 0 | - | 4.98 | 462,978 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,147 |
| Regions of France Map Quiz | 0 | - | 4.97 | 144,916 |
| Countries Bordering France | 0 | - | 4.83 | 403,688 |
| History of France | 0 | - | 4.61 | 57,312 |
| States of Germany Map Quiz | 0 | - | 4.92 | 133,273 |
| States of Germany | 0 | - | 4.95 | 153,373 |
| Germany Immigration by Country | 0 | - | 4.85 | 81,321 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,404 |
| Countries Bordering Germany | 0 | - | 4.99 | 370,810 |
| The Life of Alexander the Great | 0 | - | 4.51 | 18,525 |
| Italy Country Quiz | 0 | - | 4.77 | 123,660 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,131 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,472 |
| Regions of Spain Quiz | 0 | - | 4.90 | 114,510 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,445 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,201 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,417 |
| Countries the UK Declared War On | 0 | - | 4.55 | 122,863 |
| Geography of the British Empire | 0 | - | 4.48 | 39,746 |
| Champions League Winners | 0 | - | 4.92 | 1,010,424 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,710,345 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,296 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 193,395 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,306 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,203 |
| Top 10 European Countries by Coastline | 0 | - | 4.87 | 138,536 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,667 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 234,106 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 277,525 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 167,802 |
| Category Elimination - European Countries #1 | 0 | - | 4.90 | 90,452 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 262,549 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 115,152 |
| Countries that Border Poland | 0 | - | 4.99 | 172,657 |
| Russia Country Quiz | 0 | - | 4.83 | 114,749 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 83,006 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 101,661 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,509 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,463 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,426 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,696 |
| History of Austria | 0 | - | 4.70 | 17,915 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,888 |
| Andorra Country Quiz | 0 | - | 4.91 | 31,794 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,692 |
| France Cities Map Quiz | 0 | - | 4.96 | 167,228 |
| Departments of France | 0 | - | 4.93 | 54,538 |
| Geography of the French Empire | 0 | - | 4.45 | 27,161 |
| The French Revolution | 0 | - | 4.47 | 24,072 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,982 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,295 |
| French History Multiple Choice | 0 | - | 4.55 | 33,136 |
| Germany Country Quiz | 0 | - | 4.83 | 158,255 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 126,682 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 97,486 |
| Roman to Greek God | 0 | - | 4.52 | 123,046 |
| Counties of Ireland | 0 | - | 4.92 | 196,171 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 152,655 |
| Italian History A-Z | 0 | - | 4.21 | 17,743 |
| History of The Netherlands | 0 | - | 4.46 | 17,492 |
| The Vikings! | 0 | - | 4.46 | 28,372 |
| The Portuguese Empire | 0 | - | 4.58 | 12,086 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,141 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 186,281 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,236 |
| Countries Closest to Spain | 0 | - | 4.96 | 227,423 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,064 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 131,381 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,855 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,795 |
| Top 100 UK Baby Girls' Names in 1850 | 0 | - | 4.35 | 62,311 |
| Medieval English History | 0 | - | 4.53 | 43,581 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,220 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 38,008 |
| World Capitals Closest to London | 0 | - | 4.88 | 110,827 |
| 50 Busiest Air Routes from London | 0 | - | 4.87 | 97,037 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,762 |
| England or Wales? | 0 | - | 4.94 | 45,817 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 131,122 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,130 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,277 |
| Countries that Beat Russia | 0 | - | 4.81 | 83,112 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.86 | 96,564 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,936 |
| Moldova Country Quiz | 0 | - | 4.82 | 30,901 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 47,397 |
| The Reign of Napoleon | 0 | - | 4.54 | 39,034 |
| Germany A-Z | 0 | - | 4.56 | 62,711 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 71,706 |
| Countries that Beat Germany | 0 | - | 4.94 | 106,799 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 35,235 |
| History of Germany | 0 | - | 4.39 | 52,908 |
| Holy Roman Empire Countries | 0 | - | 4.77 | 54,851 |
| Ancient Greek Inventions | 0 | - | 4.18 | 16,378 |
| Things with Names from Classical Mythology | 0 | - | 4.28 | 87,893 |
| Word Chain - Greek and Roman Mythology | 0 | - | 4.50 | 56,780 |
| Which City in Italy? | 0 | - | 4.68 | 90,327 |
| Countries Closest to Iceland | 0 | - | 4.90 | 73,772 |
| Countries that Beat Iceland | 0 | - | 4.81 | 43,009 |
| Countries that Beat Portugal | 0 | - | 4.86 | 59,549 |
| Biggest Trading Partners - Spain | 0 | - | 4.92 | 53,861 |
