| Name the English Monarchs | 0 | - | 4.91 | 504,496 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,357 |
| Axis Occupied Countries of WWII | 0 | - | 4.99 | 229,525 |
| Countries in World War I | 0 | - | 4.88 | 228,593 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,250 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.86 | 96,584 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,466 |
| Monarchies of Europe | 0 | - | 4.90 | 98,445 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,859 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 83,912 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,229 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,428 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,230 |
| Federal Subjects of Russia | 0 | - | 4.95 | 148,280 |
| Countries That Border Russia | 0 | - | 4.98 | 463,105 |
| Battle to Country | 0 | - | 4.91 | 53,617 |
| Europe Map Quiz | 0 | - | 5.00 | 4,774,454 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 193,427 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,354 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 234,518 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 167,963 |
| Russia Country Quiz | 0 | - | 4.83 | 114,783 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,530 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,444 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,631 |
| Category Elimination - European Countries #1 | 0 | - | 4.90 | 90,526 |
| Countries that Border Poland | 0 | - | 4.99 | 172,705 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 83,023 |
| Ukraine Country Quiz | 0 | - | 4.43 | 47,846 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,489 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,738 |
| Countries in World War II | 0 | - | 4.54 | 915,564 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 429,510 |
| Countries that Beat Russia | 0 | - | 4.81 | 83,155 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,949 |
| Moldova Country Quiz | 0 | - | 4.82 | 30,915 |
| The Reign of Napoleon | 0 | - | 4.54 | 39,048 |
| The Trojan War | 0 | - | 4.83 | 39,846 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 649,608 |
| Name that Greek Letter | 0 | - | 4.93 | 324,334 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,402 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,010 |
| Roman Emperors | 0 | - | 4.95 | 120,541 |
| Countries That Use the Euro | 0 | - | 4.95 | 105,842 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 365,309 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 115,936 |
| The Only European Country ... | 0 | - | 4.91 | 217,730 |
| European Countries NOT in NATO | 0 | - | 4.90 | 61,799 |
| Olympian Gods Quiz | 0 | - | 4.96 | 502,252 |
| Zone 1 London Underground Stations - With a Map | 0 | - | 4.90 | 52,544 |
| The Vietnam War | 0 | - | 4.44 | 35,594 |
| The American Civil War | 0 | - | 4.62 | 52,516 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,250,365 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,331,742 |
| History of Russia Quiz | 0 | - | 4.47 | 31,970 |
| Ancient Greek Words | 0 | - | 4.93 | 112,039 |
| History of Italy | 0 | - | 4.55 | 32,085 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,745 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,323 |
| Countries Closest to Spain A-Z | 0 | - | 4.98 | 108,478 |
| Counties of England | 0 | - | 4.97 | 799,800 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,991 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,865 |
| British History A-Z #1 | 0 | - | 4.45 | 46,614 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,819 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 358,791 |
| Important Cities in WWII | 0 | - | 4.42 | 93,655 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 193,055 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 151,561 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 219,682 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,464 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 35,078 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 311,697 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 173,861 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 89,700 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,495 |
| Slavic Countries | 0 | - | 4.96 | 111,994 |
| Most Mentioned Allies of Russia | 0 | - | 4.49 | 38,095 |
| Most Mentioned Enemies of Russia | 0 | - | 4.69 | 90,173 |
| Russian History A-Z | 0 | - | 4.35 | 31,915 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 438,375 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,323 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,365 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,739 |
| Champions League Winners | 0 | - | 4.92 | 1,010,886 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 98,217 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 96,135 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 137,968 |
| Three Band Flags of Europe | 0 | - | 4.98 | 193,862 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,471 |
| Pixelated Europe Map | 0 | - | 4.88 | 123,082 |
| European Countries with One Border | 0 | - | 4.97 | 183,254 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 180,025 |
| European Geography By Letter - B #2 | 0 | - | 4.86 | 87,481 |
| Albania Country Quiz | 0 | - | 4.54 | 39,117 |
| Russian Inventions | 0 | - | 4.39 | 12,986 |
| Czech Republic Country Quiz | 0 | - | 4.52 | 42,328 |
| Hungary Country Quiz | 0 | - | 4.49 | 43,596 |
| Romania Country Quiz | 0 | - | 4.63 | 53,950 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,191 |
| Serbia Country Quiz | 0 | - | 4.44 | 35,117 |
| History of Austria | 0 | - | 4.70 | 17,923 |
| Regions of France Map Quiz | 0 | - | 4.97 | 144,969 |
| Geography of the French Empire | 0 | - | 4.45 | 27,168 |
| The French Revolution | 0 | - | 4.47 | 24,079 |
| Countries Bordering France | 0 | - | 4.83 | 403,832 |
| Kings of France Quiz | 0 | - | 4.20 | 32,845 |
| History of France | 0 | - | 4.61 | 57,347 |
| States of Germany Map Quiz | 0 | - | 4.92 | 133,323 |
| States of Germany | 0 | - | 4.95 | 153,546 |
| Germany Immigration by Country | 0 | - | 4.85 | 81,360 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,420 |
| Countries Bordering Germany | 0 | - | 4.99 | 370,915 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 20,869 |
| Figures from Greek Mythology | 0 | - | 4.91 | 187,954 |
| Regions of Italy | 0 | - | 4.92 | 76,419 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,513 |
| The Vikings! | 0 | - | 4.46 | 28,375 |
| The Portuguese Empire | 0 | - | 4.58 | 12,087 |
| Regions of Spain Quiz | 0 | - | 4.90 | 114,647 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,488 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,237 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,424 |
| English Royal Consorts | 0 | - | 4.38 | 37,441 |
| Countries the UK Declared War On | 0 | - | 4.55 | 122,973 |
| Geography of the British Empire | 0 | - | 4.48 | 39,771 |
| Places Where Winston Churchill Said We Would Fight the Nazis | 0 | - | 4.57 | 14,633 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,771 |
| Monarchies of Asia | 0 | - | 4.97 | 71,295 |
| Asian Country Superlatives | 0 | - | 4.84 | 81,081 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.93 | 84,618 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 92,475 |
| U.S. Five-Star Generals and Admirals | 0 | - | 4.33 | 8,344 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,971 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,711,844 |
| U.S. Civil War Decoder | 0 | - | 4.14 | 25,304 |
| Canadian Prime Ministers | 0 | - | 4.64 | 57,723 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,227 |
| Top 10 European Countries by Coastline | 0 | - | 4.88 | 138,558 |
| Top 10 Richest Countries in Europe | 0 | - | 4.90 | 150,122 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 199,966 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,692 |
| Biggest Trading Partners - European Union | 0 | - | 4.91 | 73,006 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 277,684 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 262,772 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 115,242 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 101,770 |
| Lithuania Country Quiz | 0 | - | 4.61 | 31,696 |
| Latvia Country Quiz | 0 | - | 4.77 | 32,115 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,907 |
| Andorra Country Quiz | 0 | - | 4.91 | 31,815 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,721 |
| France Cities Map Quiz | 0 | - | 4.96 | 167,291 |
| Departments of France | 0 | - | 4.93 | 54,609 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,994 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,312 |
| Germany Country Quiz | 0 | - | 4.83 | 158,316 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 126,739 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 97,605 |
| German History A-Z | 0 | - | 4.49 | 24,681 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,115 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,968 |
| Counties of Ireland | 0 | - | 4.92 | 196,301 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 149,803 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 152,701 |
| Italian History A-Z | 0 | - | 4.21 | 17,750 |
| Countries Bordering Italy | 0 | - | 4.94 | 101,063 |
| Countries Closest to Italy | 0 | - | 4.97 | 198,465 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,637 |
| Byzantine History | 0 | - | 4.91 | 28,940 |
| Byzantine Emperors | 0 | - | 4.92 | 14,415 |
| History of The Netherlands | 0 | - | 4.46 | 17,499 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,179 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 186,348 |
| Spanish History A-Z | 0 | - | 4.37 | 19,330 |
| Countries Closest to Spain | 0 | - | 4.96 | 227,501 |
| British Acronyms | 0 | - | 4.40 | 45,871 |
| British Monopoly Board | 0 | - | 4.52 | 41,209 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,154 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 131,483 |
| Medieval English History | 0 | - | 4.53 | 43,592 |
| The Reign of Queen Elizabeth II | 0 | - | 4.36 | 35,903 |
| World Capitals Closest to London | 0 | - | 4.88 | 110,852 |
| 50 Busiest Air Routes from London | 0 | - | 4.87 | 97,066 |
| England or Wales? | 0 | - | 4.94 | 45,827 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 131,224 |
| Top 10 Coldest Asian Countries | 0 | - | 4.95 | 123,546 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.87 | 135,931 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.86 | 110,481 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 97,223 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,167 |
| Top 10 Richest Countries in Africa | 0 | - | 4.85 | 76,507 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 120,889 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 92,717 |
| Countries that Have Won the Most Battles | 0 | - | 4.01 | 39,677 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,283 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,678 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 115,836 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 64,466 |
| Slovenia Country Quiz | 0 | - | 4.55 | 30,818 |
