| Name the English Monarchs | 0 | - | 4.92 | 498,577 |
| The Trojan War | 0 | - | 4.83 | 39,470 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 642,733 |
| Name that Greek Letter | 0 | - | 4.94 | 321,889 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,726 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,119 |
| Roman Emperors | 0 | - | 4.95 | 118,634 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,447 |
| Monarchies of Europe | 0 | - | 4.90 | 97,425 |
| European Geography By Letter - B #2 | 0 | - | 4.83 | 76,399 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,087 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,546 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,576 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,223 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,127 |
| Countries Bordering France | 0 | - | 4.83 | 400,084 |
| Countries Bordering Germany | 0 | - | 4.99 | 367,327 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,595 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,634 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,352 |
| Europe Map Quiz | 0 | - | 5.00 | 4,735,140 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,338 |
| Top 10 Hottest European Countries | 0 | - | 4.89 | 126,204 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 230,826 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 165,386 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,408 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,192 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,546 |
| Countries Bordering Austria | 0 | - | 4.97 | 117,853 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,583 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 71,857 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 94,610 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,012 |
| Counties of Ireland | 0 | - | 4.92 | 193,299 |
| Countries Bordering Italy | 0 | - | 4.94 | 100,509 |
| Countries Closest to Italy | 0 | - | 4.97 | 196,464 |
| Countries Closest to Spain | 0 | - | 4.96 | 225,504 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 128,881 |
| British History A-Z #1 | 0 | - | 4.45 | 46,148 |
| World Capitals Closest to London | 0 | - | 4.87 | 109,834 |
| 50 Busiest Air Routes from London | 0 | - | 4.87 | 95,845 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 425,588 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 46,667 |
| Countries that Beat Germany | 0 | - | 4.95 | 105,504 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 34,541 |
| The Life of Alexander the Great | 0 | - | 4.49 | 18,432 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,024 |
| Countries that Beat Italy | 0 | - | 4.85 | 53,955 |
| Countries Closest to Iceland | 0 | - | 4.89 | 72,929 |
| Countries that Beat Portugal | 0 | - | 4.86 | 58,754 |
| Countries that Beat Spain | 0 | - | 4.94 | 62,528 |
| British Monopoly Board | 0 | - | 4.52 | 41,054 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 97,920 |
| English Royal Consorts | 0 | - | 4.37 | 37,211 |
| 2025–2026 Football League Teams | 0 | - | 4.93 | 397,711 |
| Countries That Use the Euro | 0 | - | 4.95 | 103,269 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 362,591 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 113,761 |
| The Only European Country ... | 0 | - | 4.91 | 214,173 |
| European Countries NOT in NATO | 0 | - | 4.87 | 59,779 |
| German History A-Z | 0 | - | 4.49 | 24,431 |
| Olympian Gods Quiz | 0 | - | 4.96 | 496,951 |
| The Life of Julius Caesar | 0 | - | 4.39 | 38,975 |
| History of The Netherlands | 0 | - | 4.46 | 17,331 |
| Countries that Beat Iceland | 0 | - | 4.81 | 42,397 |
| Zone 1 London Underground Stations - With a Map | 0 | - | 4.90 | 52,017 |
| Top 4 in English Football, 1888–2025 | 0 | - | 4.92 | 139,363 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,228,909 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,320,936 |
| History of Russia Quiz | 0 | - | 4.49 | 31,804 |
| Ancient Greek Words | 0 | - | 4.92 | 110,814 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 72,990 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,472 |
| History of Italy | 0 | - | 4.55 | 31,846 |
| Italian History A-Z | 0 | - | 4.21 | 17,564 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,566 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,719 |
| Roman Names for Places | 0 | - | 4.62 | 57,924 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,501 |
| Countries that Beat the Netherlands | 0 | - | 4.56 | 36,182 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,009 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,048 |
| Spanish History A-Z | 0 | - | 4.37 | 19,175 |
| Counties of England | 0 | - | 4.97 | 790,091 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,597 |
| English First Names of the Middle Ages | 0 | - | 4.47 | 60,377 |
| British History Quiz for Dummies | 0 | - | 4.70 | 78,192 |
| The Reign of Queen Elizabeth II | 0 | - | 4.36 | 35,703 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 350,614 |
| European Geography By Letter - A | 0 | - | 4.56 | 132,480 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 110,967 |
| European Geography By Letter - C | 0 | - | 4.46 | 111,929 |
| European Geography By Letter - D | 0 | - | 4.50 | 106,779 |
| European Geography By Letter - L | 0 | - | 4.52 | 112,284 |
| European Geography By Letter - M | 0 | - | 4.61 | 129,029 |
| European Geography By Letter - N | 0 | - | 4.44 | 99,737 |
| European Geography By Letter - R | 0 | - | 4.42 | 92,686 |
| European Geography By Letter - V | 0 | - | 4.43 | 92,066 |
| European Geography By Letter - T | 0 | - | 4.41 | 81,384 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 99,646 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 191,822 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 150,410 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 216,621 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 86,566 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,777 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 308,109 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 168,401 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,386 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,308 |
| Slavic Countries | 0 | - | 4.96 | 110,963 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,748 |
| Famous Irish People | 0 | - | 4.05 | 45,870 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 434,022 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,670 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,083 |
| The Reign of Henry VIII | 0 | - | 4.25 | 27,632 |
| Elizabeth I... or Elizabeth II? | 0 | - | 4.30 | 24,436 |
| London A-Z | 0 | - | 4.10 | 40,660 |
| Champions League Winners | 0 | - | 4.92 | 997,546 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,470 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 95,116 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 136,534 |
| Three Band Flags of Europe | 0 | - | 4.98 | 192,034 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,316 |
| Pixelated Europe Map | 0 | - | 4.88 | 121,913 |
| European Countries with One Border | 0 | - | 4.97 | 181,763 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 178,658 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 79,935 |
| Federal Subjects of Russia | 0 | - | 4.94 | 144,401 |
| Countries That Border Russia | 0 | - | 4.98 | 459,457 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,285 |
| History of Austria | 0 | - | 4.70 | 17,768 |
| Regions of France Map Quiz | 0 | - | 4.97 | 143,355 |
| Geography of the French Empire | 0 | - | 4.45 | 26,952 |
| The French Revolution | 0 | - | 4.46 | 23,807 |
| Kings of France Quiz | 0 | - | 4.20 | 32,579 |
| History of France | 0 | - | 4.59 | 56,228 |
| French History A-Z | 0 | - | 4.22 | 23,766 |
| States of Germany Map Quiz | 0 | - | 4.91 | 131,859 |
| States of Germany | 0 | - | 4.96 | 150,383 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,399 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,128 |
| Figures from Greek Mythology | 0 | - | 4.91 | 185,216 |
| Regions of Italy | 0 | - | 4.92 | 74,867 |
| Seven Hills of Rome | 0 | - | 4.70 | 9,119 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 43,918 |
| The Vikings! | 0 | - | 4.46 | 28,255 |
| The Portuguese Empire | 0 | - | 4.54 | 12,002 |
| Regions of Spain Quiz | 0 | - | 4.90 | 112,520 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,419 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 93,123 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,292 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,218 |
| Countries the UK Declared War On | 0 | - | 4.61 | 121,906 |
| Geography of the British Empire | 0 | - | 4.48 | 39,517 |
| The Reign of Queen Victoria | 0 | - | 4.33 | 23,358 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,563 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 66,073 |
| Monarchies of Asia | 0 | - | 4.97 | 70,659 |
| Asian Country Superlatives | 0 | - | 4.83 | 80,479 |
| Battle to Country | 0 | - | 4.91 | 52,606 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,026 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 91,198 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.90 | 76,159 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.93 | 91,162 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,564 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,660,124 |
| European Geography By Letter - E | 0 | - | 4.23 | 112,280 |
| European Geography By Letter - F | 0 | - | 4.17 | 91,716 |
| European Geography By Letter - H | 0 | - | 4.30 | 94,949 |
| European Geography By Letter - G | 0 | - | 4.27 | 101,337 |
| European Geography By Letter - I | 0 | - | 4.10 | 94,543 |
| European Geography By Letter - K | 0 | - | 4.14 | 69,207 |
| European Geography By Letter - O | 0 | - | 4.28 | 61,964 |
| European Geography by Letter - W | 0 | - | 4.20 | 82,332 |
| European Geography By Letter - S #2 | 0 | - | 4.19 | 50,548 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 70,826 |
| European Geography A-Z | 0 | - | 4.28 | 49,037 |
| Top 10 European Countries by Coastline | 0 | - | 4.87 | 137,920 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 64,907 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 274,462 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 89,088 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 257,258 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 113,401 |
| Countries that Border Poland | 0 | - | 4.99 | 171,478 |
| Russia Country Quiz | 0 | - | 4.85 | 113,754 |
| Russian History A-Z | 0 | - | 4.38 | 31,140 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,432 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 98,790 |
| Croatia Country Quiz | 0 | - | 4.83 | 42,931 |
| Countries that Border Hungary | 0 | - | 4.98 | 103,766 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,090 |
| Countries Bordering Serbia | 0 | - | 4.96 | 91,843 |
| France Cities Map Quiz | 0 | - | 4.96 | 165,358 |
| Departments of France | 0 | - | 4.93 | 52,959 |
| Most Popular Baby Girls Names in Germany | 0 | - | 4.51 | 38,665 |
| Germany Country Quiz | 0 | - | 4.82 | 156,744 |
| Germany Cities Map Quiz | 0 | - | 4.86 | 125,292 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,805 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,792 |
