| Name the English Monarchs | 0 | - | 4.91 | 506,439 |
| The Trojan War | 0 | - | 4.83 | 39,993 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 651,996 |
| Name that Greek Letter | 0 | - | 4.93 | 324,994 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,968 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,594 |
| Roman Emperors | 0 | - | 4.95 | 121,217 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,451 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 98,953 |
| Monarchies of Europe | 0 | - | 4.90 | 98,883 |
| European Geography By Letter - B #2 | 0 | - | 4.87 | 88,851 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,390 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 85,473 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,792 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.97 | 71,861 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,595 |
| Countries Bordering France | 0 | - | 4.83 | 404,944 |
| Countries Bordering Germany | 0 | - | 4.99 | 371,885 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,968 |
| Houses of British Monarchs | 0 | - | 4.54 | 65,954 |
| Europe Map Quiz | 0 | - | 5.00 | 4,788,620 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 193,898 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,803 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 235,892 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 168,948 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,798 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,754 |
| French Geography Quiz #1 | 0 | - | 4.89 | 35,089 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,955 |
| Countries that Visit France the Most | 0 | - | 4.85 | 46,152 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,484 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 98,669 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,241 |
| Counties of Ireland | 0 | - | 4.92 | 197,357 |
| Countries Bordering Italy | 0 | - | 4.94 | 101,261 |
| Countries Closest to Italy | 0 | - | 4.97 | 199,392 |
| Countries Closest to Spain | 0 | - | 4.96 | 228,140 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 132,395 |
| British History A-Z #1 | 0 | - | 4.45 | 47,266 |
| World Capitals Closest to London | 0 | - | 4.88 | 111,076 |
| 50 Busiest Air Routes from London | 0 | - | 4.87 | 97,308 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 430,919 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 47,704 |
| Countries that Beat Germany | 0 | - | 4.94 | 107,329 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 35,561 |
| The Life of Alexander the Great | 0 | - | 4.51 | 18,581 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,658 |
| Countries that Beat Italy | 0 | - | 4.85 | 55,177 |
| Countries Closest to Iceland | 0 | - | 4.90 | 74,163 |
| Countries that Beat Portugal | 0 | - | 4.86 | 59,884 |
| Countries that Beat Spain | 0 | - | 4.94 | 63,355 |
| British Monopoly Board | 0 | - | 4.52 | 41,271 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 99,094 |
| English Royal Consorts | 0 | - | 4.38 | 37,527 |
| 2026–2027 Football League Teams | 0 | - | 4.94 | 406,898 |
| Countries That Use the Euro | 0 | - | 4.95 | 106,829 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 366,257 |
| 10 Easternmost Countries in Europe | 0 | - | 4.87 | 117,156 |
| The Only European Country ... | 0 | - | 4.91 | 219,058 |
| European Countries NOT in NATO | 0 | - | 4.91 | 62,540 |
| German History A-Z | 0 | - | 4.49 | 24,918 |
| Olympian Gods Quiz | 0 | - | 4.96 | 503,798 |
| The Life of Julius Caesar | 0 | - | 4.39 | 39,179 |
| History of The Netherlands | 0 | - | 4.46 | 17,556 |
| Countries that Beat Iceland | 0 | - | 4.81 | 43,233 |
| Zone 1 London Underground Stations - With a Map | 0 | - | 4.90 | 52,782 |
| Top 4 in English Football, 1888–2026 | 0 | - | 4.92 | 143,443 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,258,347 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,335,759 |
| History of Russia Quiz | 0 | - | 4.47 | 32,006 |
| Ancient Greek Words | 0 | - | 4.93 | 112,476 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 74,316 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,843 |
| History of Italy | 0 | - | 4.55 | 32,148 |
| Italian History A-Z | 0 | - | 4.16 | 17,932 |
| Ancient Roman Trivia #2 | 0 | - | 4.61 | 44,298 |
| Geography of the Roman Empire | 0 | - | 4.55 | 52,209 |
| Roman Names for Places | 0 | - | 4.62 | 58,714 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,825 |
| Countries that Beat the Netherlands | 0 | - | 4.56 | 36,617 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,426 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,314 |
| Spanish History A-Z | 0 | - | 4.37 | 19,511 |
| Counties of England | 0 | - | 4.97 | 803,020 |
| Invasions of Great Britain | 0 | - | 4.51 | 60,099 |
| English First Names of the Middle Ages | 0 | - | 4.47 | 61,087 |
| British History Quiz for Dummies | 0 | - | 4.70 | 79,062 |
| The Reign of Queen Elizabeth II | 0 | - | 4.36 | 35,991 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 361,778 |
| European Geography By Letter - A | 0 | - | 4.52 | 148,219 |
| European Geography By Letter - B #1 | 0 | - | 4.62 | 121,620 |
| European Geography By Letter - C | 0 | - | 4.44 | 124,052 |
| European Geography By Letter - D | 0 | - | 4.49 | 117,793 |
| European Geography By Letter - L | 0 | - | 4.52 | 115,127 |
| European Geography By Letter - M | 0 | - | 4.69 | 132,583 |
| European Geography By Letter - N | 0 | - | 4.44 | 102,170 |
| European Geography By Letter - R | 0 | - | 4.43 | 94,647 |
| European Geography By Letter - V | 0 | - | 4.43 | 94,082 |
| European Geography By Letter - T | 0 | - | 4.41 | 83,650 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 101,472 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 193,520 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 152,069 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 220,824 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,780 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 35,188 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 312,774 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 175,855 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 90,193 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,801 |
| Slavic Countries | 0 | - | 4.96 | 112,379 |
| Russian History A-Z | 0 | - | 4.35 | 32,227 |
| The Reign of Napoleon | 0 | - | 4.54 | 39,144 |
| Famous Irish People | 0 | - | 4.05 | 46,065 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 439,857 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,505 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,408 |
| British Geography A-Z | 0 | - | 4.42 | 19,614 |
| The Reign of Henry VIII | 0 | - | 4.25 | 27,871 |
| Elizabeth I... or Elizabeth II? | 0 | - | 4.30 | 24,565 |
| London A-Z | 0 | - | 4.10 | 40,880 |
| Champions League Winners | 0 | - | 4.92 | 1,016,278 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,833 |
| European Diaspora - Top 11 Countries | 0 | - | 4.88 | 96,814 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 138,525 |
| Three Band Flags of Europe | 0 | - | 4.98 | 194,612 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,774 |
| Pixelated Europe Map | 0 | - | 4.88 | 123,482 |
| European Countries with One Border | 0 | - | 4.97 | 183,815 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 180,554 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 81,993 |
| Federal Subjects of Russia | 0 | - | 4.95 | 149,518 |
| Countries That Border Russia | 0 | - | 4.98 | 464,527 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,478 |
| History of Austria | 0 | - | 4.70 | 17,975 |
| Regions of France Map Quiz | 0 | - | 4.97 | 145,661 |
| Geography of the French Empire | 0 | - | 4.45 | 27,218 |
| The French Revolution | 0 | - | 4.47 | 24,148 |
| Kings of France Quiz | 0 | - | 4.21 | 32,931 |
| History of France | 0 | - | 4.61 | 57,626 |
| French History A-Z | 0 | - | 4.27 | 25,138 |
| States of Germany Map Quiz | 0 | - | 4.92 | 133,810 |
| States of Germany | 0 | - | 4.95 | 154,531 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,560 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,701 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 20,969 |
| Figures from Greek Mythology | 0 | - | 4.91 | 188,874 |
| Regions of Italy | 0 | - | 4.92 | 77,095 |
| Seven Hills of Rome | 0 | - | 4.70 | 9,265 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,809 |
| The Vikings! | 0 | - | 4.46 | 28,407 |
| The Portuguese Empire | 0 | - | 4.58 | 12,107 |
| Regions of Spain Quiz | 0 | - | 4.90 | 115,335 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,772 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,530 |
| United Kingdom A-Z | 0 | - | 4.51 | 88,375 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,464 |
| Countries the UK Declared War On | 0 | - | 4.55 | 123,260 |
| Geography of the British Empire | 0 | - | 4.48 | 39,848 |
| British History A-Z #2 | 0 | - | 4.26 | 11,881 |
| The Reign of Queen Victoria | 0 | - | 4.34 | 23,549 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,843 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 67,036 |
| Monarchies of Asia | 0 | - | 4.97 | 71,511 |
| Asian Country Superlatives | 0 | - | 4.84 | 81,292 |
| Battle to Country | 0 | - | 4.91 | 53,967 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.94 | 95,216 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 92,848 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 73,106 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,726,406 |
| European Geography By Letter - E | 0 | - | 4.23 | 115,268 |
| European Geography By Letter - F | 0 | - | 4.15 | 94,537 |
| European Geography By Letter - H | 0 | - | 4.30 | 97,252 |
| European Geography By Letter - G | 0 | - | 4.27 | 104,010 |
| European Geography By Letter - I | 0 | - | 4.07 | 96,614 |
| European Geography By Letter - K | 0 | - | 4.15 | 71,249 |
| European Geography By Letter - O | 0 | - | 4.29 | 63,621 |
| European Geography by Letter - W | 0 | - | 4.21 | 83,620 |
| European Geography By Letter - S #2 | 0 | - | 4.20 | 51,923 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,359 |
| European Geography A-Z | 0 | - | 4.29 | 49,486 |
| Top 10 European Countries by Coastline | 0 | - | 4.86 | 138,733 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,949 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 278,942 |
| Category Elimination - European Countries #1 | 0 | - | 4.90 | 91,090 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 264,691 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 115,902 |
| Countries that Border Poland | 0 | - | 4.99 | 173,180 |
| Russia Country Quiz | 0 | - | 4.83 | 115,323 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 83,276 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 102,879 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,746 |
| Countries that Border Hungary | 0 | - | 4.98 | 105,012 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,593 |
| Countries Bordering Serbia | 0 | - | 4.96 | 93,102 |
| Andorra Country Quiz | 0 | - | 4.91 | 31,940 |
| France Cities Map Quiz | 0 | - | 4.96 | 167,816 |
| Departments of France | 0 | - | 4.93 | 55,171 |
| Most Popular Baby Girls Names in Germany | 0 | - | 4.51 | 38,995 |
| Germany Country Quiz | 0 | - | 4.82 | 158,856 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 127,079 |
