| Name the English Monarchs | 0 | - | 4.92 | 499,870 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 644,290 |
| Name that Greek Letter | 0 | - | 4.93 | 322,443 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,598 |
| European Geography By Letter - B #2 | 0 | - | 4.84 | 76,643 |
| The Trojan War | 0 | - | 4.83 | 39,547 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,102 |
| British History A-Z #1 | 0 | - | 4.45 | 46,281 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,256 |
| Roman Emperors | 0 | - | 4.95 | 119,148 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,725 |
| German History A-Z | 0 | - | 4.49 | 24,502 |
| British Geography A-Z | 0 | - | 4.41 | 19,463 |
| London A-Z | 0 | - | 4.10 | 40,692 |
| Italian History A-Z | 0 | - | 4.21 | 17,620 |
| Spanish History A-Z | 0 | - | 4.37 | 19,220 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 117,756 |
| Monarchies of Europe | 0 | - | 4.90 | 97,661 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,479 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,809 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,908 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,448 |
| Countries Bordering France | 0 | - | 4.83 | 400,976 |
| Countries Bordering Germany | 0 | - | 4.99 | 367,893 |
| Ancient Greek Words | 0 | - | 4.93 | 111,057 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 73,214 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,676 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,453 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 66,164 |
| European Geography By Letter - A | 0 | - | 4.61 | 132,658 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 111,111 |
| European Geography By Letter - C | 0 | - | 4.46 | 112,093 |
| European Geography By Letter - D | 0 | - | 4.50 | 106,966 |
| European Geography By Letter - L | 0 | - | 4.52 | 112,429 |
| European Geography By Letter - M | 0 | - | 4.64 | 129,283 |
| European Geography By Letter - N | 0 | - | 4.44 | 100,019 |
| European Geography By Letter - R | 0 | - | 4.42 | 92,797 |
| European Geography By Letter - V | 0 | - | 4.43 | 92,428 |
| European Geography By Letter - T | 0 | - | 4.41 | 81,581 |
| Europe Map Quiz | 0 | - | 5.00 | 4,744,038 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 99,788 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,572 |
| Top 10 Hottest European Countries | 0 | - | 4.89 | 126,447 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 231,630 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 165,980 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,700 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,282 |
| Russian History A-Z | 0 | - | 4.38 | 31,367 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,619 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,007 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,682 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 71,959 |
| French History A-Z | 0 | - | 4.22 | 24,354 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 95,277 |
| Counties of Ireland | 0 | - | 4.92 | 193,917 |
| Countries Bordering Italy | 0 | - | 4.94 | 100,617 |
| Countries Closest to Italy | 0 | - | 4.97 | 196,840 |
| Countries Closest to Spain | 0 | - | 4.96 | 226,166 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,410 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 129,384 |
| World Capitals Closest to London | 0 | - | 4.87 | 110,015 |
| 50 Busiest Air Routes from London | 0 | - | 4.87 | 95,987 |
| Name a World Capital A-Z | 0 | - | 5.00 | 175,403 |
| Name a Country A-Z | 0 | - | 5.00 | 241,575 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 426,387 |
| Countries that Beat Germany | 0 | - | 4.95 | 105,780 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,124 |
| Countries that Beat Italy | 0 | - | 4.85 | 54,105 |
| Countries Closest to Iceland | 0 | - | 4.89 | 73,121 |
| Countries that Beat Portugal | 0 | - | 4.86 | 58,927 |
| Countries that Beat Spain | 0 | - | 4.94 | 62,635 |
| British Monopoly Board | 0 | - | 4.52 | 41,091 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,091 |
| English Royal Consorts | 0 | - | 4.37 | 37,259 |
| 2025–2026 Football League Teams | 0 | - | 4.93 | 398,862 |
| Countries That Use the Euro | 0 | - | 4.95 | 103,806 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 363,109 |
| European Geography By Letter - E | 0 | - | 4.23 | 112,417 |
| European Geography By Letter - F | 0 | - | 4.17 | 91,843 |
| European Geography By Letter - H | 0 | - | 4.30 | 95,083 |
| European Geography By Letter - G | 0 | - | 4.27 | 101,708 |
| European Geography By Letter - I | 0 | - | 4.10 | 94,664 |
| European Geography By Letter - K | 0 | - | 4.14 | 69,351 |
| European Geography By Letter - O | 0 | - | 4.28 | 62,077 |
| European Geography by Letter - W | 0 | - | 4.20 | 82,419 |
| European Geography By Letter - S #2 | 0 | - | 4.19 | 50,642 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 114,218 |
| European Geography A-Z | 0 | - | 4.29 | 49,097 |
| The Only European Country ... | 0 | - | 4.91 | 214,969 |
| European Countries NOT in NATO | 0 | - | 4.90 | 60,222 |
| Olympian Gods Quiz | 0 | - | 4.96 | 498,143 |
| History of The Netherlands | 0 | - | 4.46 | 17,352 |
| Countries that Beat Iceland | 0 | - | 4.81 | 42,516 |
| Zone 1 London Underground Stations - With a Map | 0 | - | 4.90 | 52,135 |
| Top 4 in English Football, 1888–2025 | 0 | - | 4.92 | 139,871 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,233,698 |
| European Cities A-Z by Clue #1 | 0 | - | 4.25 | 78,282 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,323,090 |
| History of Russia Quiz | 0 | - | 4.49 | 31,835 |
| Countries that Beat Greece | 0 | - | 4.53 | 48,740 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,528 |
| History of Italy | 0 | - | 4.55 | 31,892 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,615 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,770 |
| Roman Names for Places | 0 | - | 4.62 | 58,037 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,552 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,081 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,073 |
| Countries Closest to Spain A-Z | 0 | - | 4.98 | 107,919 |
| Counties of England | 0 | - | 4.97 | 792,122 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,699 |
| English First Names of the Middle Ages | 0 | - | 4.47 | 60,465 |
| British History Quiz for Dummies | 0 | - | 4.70 | 78,322 |
| The Reign of Queen Elizabeth II | 0 | - | 4.36 | 35,747 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 352,276 |
| U.S. History A-Z #1 | 0 | - | 4.35 | 29,756 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 192,088 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 150,663 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 217,263 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 86,732 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,834 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 309,161 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 169,304 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,679 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,496 |
| Slavic Countries | 0 | - | 4.96 | 111,193 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,819 |
| Ancient Greek Inventions | 0 | - | 4.17 | 16,311 |
| Famous Ancient Romans | 0 | - | 4.69 | 85,170 |
| Famous Irish People | 0 | - | 4.05 | 45,902 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 434,966 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,815 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,140 |
| The Reign of Henry VIII | 0 | - | 4.25 | 27,664 |
| Elizabeth I... or Elizabeth II? | 0 | - | 4.30 | 24,458 |
| Champions League Winners | 0 | - | 4.92 | 1,000,268 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 70,941 |
| Asian Geography by Letter - H | 0 | - | 4.49 | 65,512 |
| Asian Geography By Letter - M | 0 | - | 4.47 | 61,247 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 57,695 |
| Asian Geography by Letter - T | 0 | - | 4.50 | 57,175 |
| Asian Geography By Letter - L | 0 | - | 4.49 | 42,814 |
| Countries that Start with A | 0 | - | 4.98 | 2,153,006 |
| Countries that Start with B | 0 | - | 4.95 | 2,285,332 |
| Countries that Start with C | 0 | - | 4.96 | 1,814,693 |
| Countries that Start with D | 0 | - | 4.96 | 704,570 |
| Countries that Start with E | 0 | - | 4.95 | 1,371,095 |
| Countries that Start with G | 0 | - | 4.97 | 1,496,633 |
| Countries that Start with H | 0 | - | 4.96 | 600,460 |
| Countries that Start with I | 0 | - | 4.92 | 1,283,207 |
| Countries that Start with J | 0 | - | 4.98 | 598,493 |
| Countries that Start with K | 0 | - | 4.97 | 811,687 |
| Countries that Start with L | 0 | - | 4.98 | 1,085,725 |
| Countries that Start with N | 0 | - | 4.93 | 1,112,685 |
| Countries that Start with P | 0 | - | 4.94 | 1,211,526 |
| Countries that Start with S | 0 | - | 4.98 | 1,748,340 |
| Countries that Start with T | 0 | - | 4.90 | 1,006,320 |
| Countries that Start with U | 0 | - | 4.97 | 901,649 |
| Countries that Start with V | 0 | - | 4.98 | 606,652 |
| Countries that Start with F | 0 | - | 4.83 | 614,247 |
| Countries that Start with M | 0 | - | 4.97 | 1,376,472 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,766 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 95,304 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 136,856 |
| Three Band Flags of Europe | 0 | - | 4.98 | 192,427 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,551 |
| Pixelated Europe Map | 0 | - | 4.88 | 122,196 |
| European Countries with One Border | 0 | - | 4.97 | 182,064 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 178,929 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 80,268 |
| Federal Subjects of Russia | 0 | - | 4.94 | 145,101 |
| Countries That Border Russia | 0 | - | 4.98 | 460,190 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,492 |
| History of Austria | 0 | - | 4.70 | 17,794 |
| Regions of France Map Quiz | 0 | - | 4.97 | 143,696 |
| Geography of the French Empire | 0 | - | 4.45 | 26,989 |
| The French Revolution | 0 | - | 4.46 | 23,855 |
| Kings of France Quiz | 0 | - | 4.20 | 32,623 |
| History of France | 0 | - | 4.59 | 56,559 |
| States of Germany Map Quiz | 0 | - | 4.91 | 132,100 |
| States of Germany | 0 | - | 4.96 | 150,978 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,422 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,315 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,081 |
| Greece Country Quiz | 0 | - | 4.74 | 65,948 |
| The Life of Alexander the Great | 0 | - | 4.49 | 18,452 |
| Figures from Greek Mythology | 0 | - | 4.91 | 185,755 |
| Regions of Italy | 0 | - | 4.92 | 75,129 |
| Seven Hills of Rome | 0 | - | 4.70 | 9,133 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 44,071 |
| The Vikings! | 0 | - | 4.46 | 28,282 |
| The Portuguese Empire | 0 | - | 4.58 | 12,026 |
| Regions of Spain Quiz | 0 | - | 4.90 | 113,106 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,682 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 93,301 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,257 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,068 |
| Geography of the British Empire | 0 | - | 4.48 | 39,569 |
| The Reign of Queen Victoria | 0 | - | 4.33 | 23,384 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,611 |
