| French Geography Quiz #1 | 0 | - | 4.89 | 34,495 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,318,741 |
| Countries that Beat Russia | 0 | - | 4.84 | 81,799 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 46,554 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 34,407 |
| Africa Geography Quiz #1 | 0 | - | 4.93 | 48,979 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 148,806 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,314 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,268 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,009 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 55,927 |
| Federal Subjects of Russia | 0 | - | 4.94 | 143,649 |
| Countries That Border Russia | 0 | - | 4.98 | 458,617 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,489 |
| Europe Map Quiz | 0 | - | 5.00 | 4,728,201 |
| Europe Geography Quiz #1 | 0 | - | 4.54 | 70,964 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,585 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 69,913 |
| Europe Geography Quiz #5 | 0 | - | 4.54 | 60,956 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 230,275 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 274,011 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 164,943 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 256,379 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 113,062 |
| Russia Country Quiz | 0 | - | 4.85 | 113,575 |
| Croatia Country Quiz | 0 | - | 4.83 | 42,799 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,004 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,102 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 88,880 |
| Countries that Border Poland | 0 | - | 4.99 | 171,236 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,338 |
| Countries that Border Hungary | 0 | - | 4.98 | 103,627 |
| Countries Bordering Serbia | 0 | - | 4.96 | 91,661 |
| Name the English Monarchs | 0 | - | 4.92 | 497,480 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 424,921 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,587 |
| Moldova Country Quiz | 0 | - | 4.81 | 30,520 |
| The Trojan War | 0 | - | 4.83 | 39,400 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 641,318 |
| Name that Greek Letter | 0 | - | 4.94 | 321,461 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,385 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 83,988 |
| Roman Emperors | 0 | - | 4.95 | 118,332 |
| Countries that Beat Portugal | 0 | - | 4.86 | 58,609 |
| Topological Map of Asia Quiz | 0 | - | 4.81 | 19,846 |
| Countries That Use the Euro | 0 | - | 4.96 | 102,776 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 362,105 |
| Europe Geography Quiz #3 | 0 | - | 4.34 | 63,376 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 113,371 |
| The Only European Country ... | 0 | - | 4.91 | 213,553 |
| European Countries NOT in NATO | 0 | - | 4.87 | 59,357 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.86 | 95,844 |
| Olympian Gods Quiz | 0 | - | 4.96 | 495,064 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 124,099 |
| Countries that Beat Iceland | 0 | - | 4.81 | 42,291 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,224,599 |
| History of Russia Quiz | 0 | - | 4.49 | 31,774 |
| Ancient Greek Words | 0 | - | 4.92 | 110,568 |
| History of Italy | 0 | - | 4.55 | 31,800 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,467 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 76,964 |
| Counties of England | 0 | - | 4.97 | 788,486 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,360 |
| British History Quiz for Dummies | 0 | - | 4.70 | 78,043 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 349,287 |
| Africa Geography Quiz #2 | 0 | - | 4.59 | 32,789 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 191,608 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 150,210 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 216,085 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 86,414 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 307,596 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 167,591 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,175 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,084 |
| Slavic Countries | 0 | - | 4.96 | 110,783 |
| Most Mentioned Allies of Russia | 0 | - | 4.49 | 37,776 |
| Most Mentioned Enemies of Russia | 0 | - | 4.69 | 89,515 |
| French Geography Quiz #2 | 0 | - | 4.62 | 23,083 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 72,353 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 433,181 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,556 |
| Geography of Spain | 0 | - | 4.59 | 21,942 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 101,875 |
| Champions League Winners | 0 | - | 4.92 | 995,279 |
| Asia Geography Quiz #1 | 0 | - | 4.78 | 53,307 |
| Asia Geography Quiz #2 | 0 | - | 4.56 | 48,305 |
| Asia Geography Quiz #3 | 0 | - | 4.49 | 32,140 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 120,277 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,272 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 94,975 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 136,243 |
| Three Band Flags of Europe | 0 | - | 4.98 | 191,697 |
| Pixelated Europe Map | 0 | - | 4.88 | 121,687 |
| Monarchies of Europe | 0 | - | 4.90 | 97,228 |
| European Countries with One Border | 0 | - | 4.97 | 181,491 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 177,998 |
| European Geography By Letter - B #2 | 0 | - | 4.83 | 76,134 |
| Albania Country Quiz | 0 | - | 4.54 | 38,610 |
| Russian Inventions | 0 | - | 4.39 | 12,887 |
| Czech Republic Country Quiz | 0 | - | 4.52 | 41,823 |
| Ukraine Country Quiz | 0 | - | 4.42 | 47,269 |
| Hungary Country Quiz | 0 | - | 4.49 | 42,985 |
| Romania Country Quiz | 0 | - | 4.63 | 53,307 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,113 |
| Serbia Country Quiz | 0 | - | 4.44 | 34,746 |
| History of Austria | 0 | - | 4.70 | 17,738 |
| Regions of France Map Quiz | 0 | - | 4.97 | 143,022 |
| Geography of the French Empire | 0 | - | 4.48 | 26,916 |
| The French Revolution | 0 | - | 4.46 | 23,752 |
| Countries Bordering France | 0 | - | 4.85 | 397,265 |
| History of France | 0 | - | 4.59 | 55,910 |
| States of Germany Map Quiz | 0 | - | 4.91 | 131,573 |
| States of Germany | 0 | - | 4.96 | 149,828 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,372 |
| Germany Immigration by Country | 0 | - | 4.84 | 79,926 |
| Countries Bordering Germany | 0 | - | 4.99 | 366,765 |
| Figures from Greek Mythology | 0 | - | 4.91 | 184,715 |
| Regions of Italy | 0 | - | 4.92 | 74,609 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 43,747 |
| The Vikings! | 0 | - | 4.45 | 28,236 |
| The Portuguese Empire | 0 | - | 4.54 | 11,981 |
| Regions of Spain Quiz | 0 | - | 4.90 | 112,170 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,067 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 92,853 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,156 |
| Countries the UK Declared War On | 0 | - | 4.61 | 121,716 |
| Geography of the British Empire | 0 | - | 4.48 | 39,464 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,393 |
| Asian Countries with the Shortest Names | 0 | - | 4.97 | 134,261 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 105,733 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 90,998 |
| Name a Valid African Country | 0 | - | 4.98 | 152,836 |
| Oceania Geography Quiz | 0 | - | 4.55 | 21,969 |
| South American Geography Quiz #2 | 0 | - | 4.61 | 39,176 |
| South American Geography Quiz #1 | 0 | - | 4.73 | 32,456 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 173,051 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,649,698 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,145 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,182 |
| Top 10 Hottest European Countries | 0 | - | 4.89 | 126,047 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 70,757 |
| Top 10 European Countries by Coastline | 0 | - | 4.89 | 137,785 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 64,753 |
| Topological Map of Mainland Europe | 0 | - | 4.39 | 28,534 |
| Russian History A-Z | 0 | - | 4.38 | 30,486 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 98,207 |
| Latvia Country Quiz | 0 | - | 4.75 | 31,736 |
| Countries Bordering Austria | 0 | - | 4.97 | 117,677 |
| France Cities Map Quiz | 0 | - | 4.96 | 165,083 |
| Departments of France | 0 | - | 4.93 | 52,692 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,479 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 71,760 |
| Germany Country Quiz | 0 | - | 4.82 | 156,421 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 125,072 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 94,079 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,743 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,756 |
| Counties of Ireland | 0 | - | 4.92 | 192,850 |
| Italy Country Quiz | 0 | - | 4.82 | 122,093 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 148,266 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 150,997 |
| Countries Bordering Italy | 0 | - | 4.94 | 100,383 |
| Countries Italy Declared War On | 0 | - | 4.75 | 42,916 |
| Countries Closest to Italy | 0 | - | 4.97 | 196,191 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,346 |
| Byzantine History | 0 | - | 4.91 | 28,587 |
| History of The Netherlands | 0 | - | 4.46 | 17,299 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 95,879 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 184,534 |
| Countries Closest to Spain | 0 | - | 4.96 | 225,157 |
| British Groups of Things | 0 | - | 4.25 | 82,659 |
| United Kingdom Decoder | 0 | - | 4.29 | 39,942 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,138 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 128,460 |
| Medieval English History | 0 | - | 4.53 | 43,295 |
| World Capitals Closest to London | 0 | - | 4.87 | 109,625 |
| 50 Busiest Air Routes from London | 0 | - | 4.86 | 95,713 |
| England or Wales? | 0 | - | 4.94 | 45,285 |
| All UEFA Champions League Teams Ever | 0 | - | 4.84 | 128,317 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.85 | 108,585 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 95,463 |
| Name a Valid Asian Country | 0 | - | 4.98 | 119,955 |
| Topological Map of Africa Quiz | 0 | - | 4.80 | 21,107 |
| Countries that Beat the United States | 0 | - | 4.93 | 165,411 |
| U.S. History for Dummies | 0 | - | 4.47 | 82,417 |
| Countries that Beat Canada | 0 | - | 4.90 | 86,801 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,079 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.78 | 41,596 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 112,842 |
| Which City in Europe? | 0 | - | 4.83 | 106,562 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 63,735 |
| Slovenia Country Quiz | 0 | - | 4.52 | 30,445 |
| Poland Country Quiz | 0 | - | 4.22 | 62,611 |
| Slovakia Country Quiz | 0 | - | 4.64 | 30,401 |
| Bulgaria Country Quiz | 0 | - | 4.55 | 30,642 |
| Montenegro Country Quiz | 0 | - | 4.60 | 23,512 |
| Belarus Country Quiz | 0 | - | 4.74 | 27,206 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,361 |
| French History Multiple Choice | 0 | - | 4.55 | 32,860 |
| Countries that Beat Germany | 0 | - | 4.95 | 105,271 |
