| Two Letter Roman Numerals | 0 | - | 4.97 | 56,176 |
| Olympian Gods Quiz | 0 | - | 4.96 | 501,111 |
| Famous Ancient Romans | 0 | - | 4.70 | 85,490 |
| Ancient Greek Words | 0 | - | 4.93 | 111,689 |
| Byzantine History | 0 | - | 4.91 | 28,879 |
| Byzantine Emperors | 0 | - | 4.92 | 14,218 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 437,348 |
| Roman History Vocabulary | 0 | - | 4.40 | 57,613 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,560 |
| Roman Emperors | 0 | - | 4.95 | 120,135 |
| Biggest Roman Empire Countries | 0 | - | 4.87 | 101,916 |
| Count in Roman Numerals - 30 Second Sprint | 0 | - | 4.27 | 102,968 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.98 | 74,324 |
| Roman History by Picture | 0 | - | 4.46 | 26,470 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,452 |
| Figures from Greek Mythology | 0 | - | 4.91 | 187,101 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 32,059 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,473 |
| Countries of Europe in 1848 | 0 | - | 4.99 | 82,318 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,770 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,090 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,961 |
| Regions of Italy | 0 | - | 4.92 | 75,990 |
| History of Italy | 0 | - | 4.55 | 31,991 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,759 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,950 |
| Roman Names for Places | 0 | - | 4.62 | 58,319 |
| Russia Country Quiz | 0 | - | 4.83 | 114,533 |
| Countries That Border Russia | 0 | - | 4.98 | 461,917 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 149,464 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,561 |
| Modern-Day Countries of the Roman Empire on a Map | 0 | - | 4.99 | 125,988 |
| Name the English Monarchs | 0 | - | 4.91 | 503,037 |
| Europe Map Quiz | 0 | - | 5.00 | 4,764,943 |
| Countries that Border Poland | 0 | - | 4.99 | 172,332 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 101,043 |
| Serbia Country Quiz | 0 | - | 4.44 | 35,062 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 647,833 |
| Name that Greek Letter | 0 | - | 4.93 | 323,717 |
| Mythology A-Z | 0 | - | 4.31 | 37,236 |
| Countries Bordering Italy | 0 | - | 4.94 | 100,891 |
| Countries Closest to Italy | 0 | - | 4.97 | 198,121 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,323 |
| Prime Ministers of the UK | 0 | - | 4.95 | 439,312 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 428,381 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,512 |
| Countries that Beat Russia | 0 | - | 4.81 | 82,872 |
| The Trojan War | 0 | - | 4.83 | 39,750 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,944 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,353 |
| Countries that Beat Italy | 0 | - | 4.85 | 54,530 |
| Seven Hills of Rome | 0 | - | 4.70 | 9,186 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 364,602 |
| Roman to Greek God | 0 | - | 4.52 | 122,889 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 126,123 |
| The Life of Julius Caesar | 0 | - | 4.39 | 39,092 |
| Countries Closest to Spain A-Z | 0 | - | 4.98 | 108,308 |
| Name Every Beatles Song | 0 | - | 4.97 | 236,425 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 291,802 |
| Zone 1 London Underground Stations - With a Map | 0 | - | 4.90 | 52,395 |
| Countries That Use the Euro | 0 | - | 4.95 | 105,171 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,245,144 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,329,215 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 115,359 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 192,736 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 151,257 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 218,874 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,210 |
| The Only European Country ... | 0 | - | 4.91 | 216,830 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 310,718 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 172,103 |
| European Countries NOT in NATO | 0 | - | 4.90 | 61,247 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 89,358 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,255 |
| Slavic Countries | 0 | - | 4.96 | 111,722 |
| History of Russia Quiz | 0 | - | 4.47 | 31,925 |
| Russian History A-Z | 0 | - | 4.38 | 31,756 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,638 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.80 | 20,799 |
| Italy A-Z | 0 | - | 4.49 | 58,343 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,675 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,249 |
| Counties of England | 0 | - | 4.97 | 797,445 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,890 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,679 |
| People Buried at Westminster Abbey | 0 | - | 4.67 | 14,258 |
| Places Where Winston Churchill Said We Would Fight the Nazis | 0 | - | 4.57 | 14,612 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 356,407 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 95,906 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 137,621 |
| Three Band Flags of Europe | 0 | - | 4.98 | 193,424 |
| Pixelated Europe Map | 0 | - | 4.88 | 122,812 |
| Monarchies of Europe | 0 | - | 4.90 | 98,189 |
| European Countries with One Border | 0 | - | 4.97 | 182,862 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 179,661 |
| European Geography By Letter - B #2 | 0 | - | 4.84 | 78,691 |
| Albania Country Quiz | 0 | - | 4.54 | 39,018 |
| Federal Subjects of Russia | 0 | - | 4.95 | 147,482 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,944 |
| Regions of France Map Quiz | 0 | - | 4.97 | 144,522 |
| Countries Bordering France | 0 | - | 4.83 | 402,705 |
| History of France | 0 | - | 4.59 | 57,055 |
| States of Germany Map Quiz | 0 | - | 4.91 | 132,905 |
| States of Germany | 0 | - | 4.95 | 152,754 |
| Germany Immigration by Country | 0 | - | 4.85 | 81,105 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,315 |
| Countries Bordering Germany | 0 | - | 4.99 | 369,562 |
| Things with Names from Classical Mythology | 0 | - | 4.28 | 87,797 |
| Italy Country Quiz | 0 | - | 4.80 | 123,456 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,111 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,245 |
| Regions of Spain Quiz | 0 | - | 4.90 | 114,064 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,255 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,037 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,359 |
| Countries the UK Declared War On | 0 | - | 4.55 | 122,535 |
| Geography of the British Empire | 0 | - | 4.48 | 39,699 |
| Champions League Winners | 0 | - | 4.92 | 1,007,442 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,917 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,701,052 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,859 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 193,176 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,080 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,124 |
| Top 10 European Countries by Coastline | 0 | - | 4.87 | 138,417 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,487 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 233,431 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 277,000 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 167,229 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 90,132 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 261,279 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 114,791 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,878 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,378 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,268 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,359 |
| History of Austria | 0 | - | 4.70 | 17,868 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,786 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,707 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,356 |
| France Cities Map Quiz | 0 | - | 4.96 | 166,838 |
| Departments of France | 0 | - | 4.93 | 54,203 |
| Geography of the French Empire | 0 | - | 4.45 | 27,091 |
| The French Revolution | 0 | - | 4.47 | 23,978 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,890 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,204 |
| French History Multiple Choice | 0 | - | 4.55 | 33,062 |
| Germany Country Quiz | 0 | - | 4.83 | 157,942 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 126,411 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 96,877 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,021 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,929 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 73,726 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,677 |
| Counties of Ireland | 0 | - | 4.92 | 195,489 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 152,118 |
| Italian History A-Z | 0 | - | 4.21 | 17,720 |
| History of The Netherlands | 0 | - | 4.46 | 17,442 |
| The Vikings! | 0 | - | 4.46 | 28,351 |
| The Portuguese Empire | 0 | - | 4.58 | 12,068 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 96,979 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 185,736 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,183 |
| Countries Closest to Spain | 0 | - | 4.96 | 227,082 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,709 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 130,922 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,808 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,693 |
| Top 100 UK Baby Girls' Names in 1850 | 0 | - | 4.35 | 62,124 |
| Medieval English History | 0 | - | 4.53 | 43,530 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,171 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,975 |
| World Capitals Closest to London | 0 | - | 4.88 | 110,700 |
| 50 Busiest Air Routes from London | 0 | - | 4.87 | 96,880 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,712 |
| England or Wales? | 0 | - | 4.94 | 45,723 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 130,494 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,228 |
| Poland Country Quiz | 0 | - | 4.20 | 63,310 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 165,444 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 94,056 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.86 | 96,438 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,886 |
| Moldova Country Quiz | 0 | - | 4.82 | 30,828 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 47,251 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,964 |
| Germany A-Z | 0 | - | 4.56 | 62,630 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 71,521 |
| Countries that Beat Germany | 0 | - | 4.94 | 106,513 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 35,072 |
| History of Germany | 0 | - | 4.39 | 52,838 |
| Holy Roman Empire Countries | 0 | - | 4.77 | 54,806 |
| Word Chain - Greek and Roman Mythology | 0 | - | 4.50 | 56,660 |
| Iceland... or Ireland? | 0 | - | 4.74 | 57,055 |
| Which City in Italy? | 0 | - | 4.68 | 90,189 |
| Countries Closest to Iceland | 0 | - | 4.90 | 73,621 |
| Countries that Beat Iceland | 0 | - | 4.81 | 42,907 |
| Countries that Beat Portugal | 0 | - | 4.86 | 59,386 |
| Biggest Trading Partners - Spain | 0 | - | 4.92 | 53,798 |
| Countries that Beat Spain | 0 | - | 4.94 | 62,978 |
