| Name the English Monarchs | 0 | - | 4.91 | 507,500 |
| Monarchies of Europe | 0 | - | 4.90 | 99,059 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,590 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 86,132 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 66,041 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.97 | 72,046 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,748 |
| Europe Map Quiz | 0 | - | 5.00 | 4,794,164 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 73,178 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 194,095 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,987 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 35,261 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 201,012 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 119,074 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,492 |
| Countries the UK Declared War On | 0 | - | 4.55 | 123,395 |
| Geography of the British Empire | 0 | - | 4.48 | 39,884 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,731,888 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 192,042 |
| Top 10 Richest Countries in Europe | 0 | - | 4.90 | 151,451 |
| Biggest Trading Partners - European Union | 0 | - | 4.91 | 73,437 |
| Category Elimination - European Countries #1 | 0 | - | 4.90 | 91,305 |
| Prime Ministers of the UK | 0 | - | 4.95 | 443,280 |
| Canadian Prime Ministers | 0 | - | 4.64 | 58,025 |
| Countries That Use the Euro | 0 | - | 4.95 | 107,304 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 366,636 |
| 10 Easternmost Countries in Europe | 0 | - | 4.87 | 117,549 |
| The Only European Country ... | 0 | - | 4.91 | 219,669 |
| European Countries NOT in NATO | 0 | - | 4.91 | 62,872 |
| Invasions of Great Britain | 0 | - | 4.51 | 60,150 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 32,006 |
| Houses of British Monarchs | 0 | - | 4.54 | 66,037 |
| Zone 1 London Underground Stations - With a Map | 0 | - | 4.90 | 52,867 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,261,893 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,337,440 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 193,812 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 152,565 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 221,340 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,922 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 70,790 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 90,400 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,934 |
| Slavic Countries | 0 | - | 4.96 | 112,530 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,518 |
| Countries Closest to Spain A-Z | 0 | - | 4.99 | 108,952 |
| Counties of England | 0 | - | 4.97 | 804,468 |
| Countries Closest to the United Kingdom A-Z | 0 | - | 4.96 | 192,207 |
| Anglo-Saxon Kingdoms of England | 0 | - | 4.60 | 25,836 |
| British History A-Z #1 | 0 | - | 4.45 | 47,348 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.78 | 20,257 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.75 | 12,363 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 241,001 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 428,933 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 383,940 |
| European Diaspora - Top 11 Countries | 0 | - | 4.88 | 97,016 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 138,767 |
| Three Band Flags of Europe | 0 | - | 4.98 | 194,913 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,923 |
| Pixelated Europe Map | 0 | - | 4.88 | 123,654 |
| European Countries with One Border | 0 | - | 4.97 | 184,061 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 180,786 |
| Countries Invaded by the USSR | 0 | - | 4.30 | 94,518 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,604 |
| Regions of France Map Quiz | 0 | - | 4.97 | 145,836 |
| States of Germany Map Quiz | 0 | - | 4.92 | 134,002 |
| UK Cities Map Quiz | 0 | - | 4.96 | 466,895 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,662 |
| Counties of England Map Quiz | 0 | - | 4.97 | 309,323 |
| Monarchies of Asia | 0 | - | 4.97 | 71,624 |
| Asian Country Superlatives | 0 | - | 4.84 | 81,368 |
| Communist Countries in History | 0 | - | 4.63 | 498,836 |
| Battle to Country | 0 | - | 4.91 | 54,141 |
| Modern-Day Countries of the Holy Roman Empire on a Map | 0 | - | 4.93 | 46,000 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 194,062 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,975 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.74 | 58,833 |
| Countries That Border Russia | 0 | - | 4.98 | 464,988 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.46 | 26,971 |
| Countries Bordering France | 0 | - | 4.83 | 405,415 |
| History of France | 0 | - | 4.61 | 57,746 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,670 |
| Countries Bordering Germany | 0 | - | 4.99 | 372,296 |
| English Royal Consorts | 0 | - | 4.38 | 37,572 |
| All UK Parliament Constituencies on a Map | 0 | - | 4.60 | 29,101 |
| Political Movements by Country | 0 | - | 4.46 | 72,842 |
| Prime Ministers of Australia | 0 | - | 4.51 | 32,247 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 92,973 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 80,203 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 236,412 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 169,332 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 265,479 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 116,152 |
| European Capital Superlatives - Top 2 | 0 | - | 4.95 | 81,709 |
| Russia Country Quiz | 0 | - | 4.83 | 115,476 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,845 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.83 | 35,656 |
| Andorra Country Quiz | 0 | - | 4.91 | 31,999 |
| France Cities Map Quiz | 0 | - | 4.96 | 168,020 |
| Germany Country Quiz | 0 | - | 4.82 | 159,098 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 127,263 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 150,454 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 153,258 |
| Countries Italy Declared War On | 0 | - | 4.74 | 48,354 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,643 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 187,060 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 117,147 |
| UK Immigration by Country | 0 | - | 4.94 | 141,923 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 141,303 |
| Former Dominions of the British Empire | 0 | - | 4.27 | 24,286 |
| Medieval English History | 0 | - | 4.53 | 43,693 |
| Name the Popes Quiz | 0 | - | 4.47 | 139,107 |
| Countries of the Popes | 0 | - | 4.78 | 128,918 |
| Top 10 Coldest Asian Countries | 0 | - | 4.95 | 123,822 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.87 | 137,795 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.86 | 111,589 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 97,958 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,731 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 121,511 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 93,624 |
| National Founders | 0 | - | 4.40 | 84,003 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.92 | 95,730 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,167 |
| U.S. States by Governor | 0 | - | 4.43 | 18,125 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,787 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,879 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,809 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 533,139 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,408 |
| Most Guessed European Capitals | 0 | - | 4.87 | 101,957 |
| Top 10 European Countries by Coastline | 0 | - | 4.86 | 138,836 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 64,793 |
| Countries that Border Poland | 0 | - | 4.99 | 173,369 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 83,362 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 103,358 |
| Countries that Border Hungary | 0 | - | 4.98 | 105,120 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 28,097 |
| Moldova Country Quiz | 0 | - | 4.82 | 31,070 |
| Countries Bordering Serbia | 0 | - | 4.96 | 93,234 |
| Countries Bordering Austria | 0 | - | 4.97 | 119,064 |
| Countries that Visit France the Most | 0 | - | 4.85 | 46,239 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,577 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 99,197 |
| History of Germany | 0 | - | 4.39 | 53,006 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 653,140 |
| Name that Greek Letter | 0 | - | 4.93 | 325,349 |
| Counties of Ireland | 0 | - | 4.92 | 197,732 |
| Countries Bordering Italy | 0 | - | 4.94 | 101,390 |
| Countries Closest to Italy | 0 | - | 4.97 | 199,709 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,335 |
| Countries Closest to Spain | 0 | - | 4.96 | 228,407 |
| Countries that Visit the UK the Most | 0 | - | 4.88 | 76,035 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 132,701 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,360 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 38,107 |
| The Reign of Queen Elizabeth II | 0 | - | 4.36 | 36,033 |
| World Capitals Closest to London | 0 | - | 4.88 | 111,438 |
| 50 Busiest Air Routes from London | 0 | - | 4.87 | 97,432 |
| 2026–2027 Football League Teams | 0 | - | 4.94 | 408,215 |
| Malta Country Quiz | 0 | - | 4.81 | 31,271 |
| Top 10 Richest Countries in Africa | 0 | - | 4.85 | 77,159 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 42,504 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.11 | 52,695 |
| The American Civil War | 0 | - | 4.62 | 52,667 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 126,066 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 126,721 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.83 | 62,291 |
| European Cities Beginning with B - Click Map | 0 | - | 4.77 | 78,947 |
| Save Europeans by Guessing Countries | 0 | - | 4.86 | 217,524 |
| Random European Flag to Country | 0 | - | 4.90 | 184,510 |
| History of Russia Quiz | 0 | - | 4.47 | 32,030 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 166,661 |
| Biggest Trading Partners - Russia | 0 | - | 4.55 | 36,688 |
| Countries that Beat Russia | 0 | - | 4.81 | 83,769 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.86 | 96,918 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 105,021 |
| Germany A-Z | 0 | - | 4.56 | 62,909 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 72,147 |
| Countries that Beat Germany | 0 | - | 4.94 | 107,522 |
| The Trojan War | 0 | - | 4.83 | 40,095 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 113,278 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 127,991 |
| History of Italy | 0 | - | 4.55 | 32,187 |
| Italy A-Z | 0 | - | 4.49 | 58,873 |
| Countries that Beat Italy | 0 | - | 4.85 | 55,308 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,708 |
| Roman Emperors | 0 | - | 4.95 | 121,467 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,856 |
| Countries Closest to Iceland | 0 | - | 4.90 | 74,316 |
| Countries that Beat Iceland | 0 | - | 4.81 | 43,312 |
| Countries that Beat Portugal | 0 | - | 4.86 | 60,017 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,472 |
| Biggest Trading Partners - Spain | 0 | - | 4.92 | 54,036 |
| Countries that Beat Spain | 0 | - | 4.94 | 63,449 |
| Real Madrid 2010s Starting XI | 0 | - | 4.90 | 69,130 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 99,215 |
| Monty Python Quotes | 0 | - | 4.89 | 42,629 |
| Embarrassing Chapters in British History | 0 | - | 4.31 | 32,414 |
| The Reign of Henry VIII | 0 | - | 4.25 | 27,900 |
| English First Names of the Middle Ages | 0 | - | 4.47 | 61,166 |
| British History Quiz for Dummies | 0 | - | 4.70 | 79,169 |
