| French Geography Quiz #1 | 0 | - | 4.89 | 34,950 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,332,137 |
| Countries that Beat Russia | 0 | - | 4.81 | 83,193 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 47,460 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 35,315 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,269 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,899 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 84,080 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,285 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,465 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,267 |
| Federal Subjects of Russia | 0 | - | 4.95 | 148,364 |
| Countries That Border Russia | 0 | - | 4.98 | 463,426 |
| Africa Geography Quiz #1 | 0 | - | 4.93 | 49,450 |
| Europe Map Quiz | 0 | - | 5.00 | 4,775,652 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,407 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 72,062 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,353 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,326 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 234,637 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 277,814 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 168,059 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 262,930 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 115,304 |
| Russia Country Quiz | 0 | - | 4.83 | 114,816 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,543 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,456 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,648 |
| Category Elimination - European Countries #1 | 0 | - | 4.90 | 90,573 |
| Countries that Border Poland | 0 | - | 4.99 | 172,747 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 83,055 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,511 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,766 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,611 |
| Name the English Monarchs | 0 | - | 4.91 | 504,655 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 429,682 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,954 |
| Moldova Country Quiz | 0 | - | 4.82 | 30,918 |
| The Trojan War | 0 | - | 4.83 | 39,880 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 649,831 |
| Name that Greek Letter | 0 | - | 4.93 | 324,410 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,469 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,276 |
| Roman Emperors | 0 | - | 4.95 | 120,636 |
| Countries that Beat Portugal | 0 | - | 4.86 | 59,615 |
| Topological Map of Asia Quiz | 0 | - | 4.82 | 20,295 |
| Countries That Use the Euro | 0 | - | 4.95 | 105,948 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 365,401 |
| Europe Geography Quiz #3 | 0 | - | 4.35 | 63,787 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 116,338 |
| The Only European Country ... | 0 | - | 4.91 | 217,867 |
| European Countries NOT in NATO | 0 | - | 4.90 | 61,895 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.86 | 96,612 |
| Olympian Gods Quiz | 0 | - | 4.96 | 502,396 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 126,813 |
| Countries that Beat Iceland | 0 | - | 4.81 | 43,050 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,251,030 |
| History of Russia Quiz | 0 | - | 4.47 | 31,974 |
| Ancient Greek Words | 0 | - | 4.93 | 112,083 |
| History of Italy | 0 | - | 4.55 | 32,090 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,754 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,339 |
| Counties of England | 0 | - | 4.97 | 800,077 |
| Invasions of Great Britain | 0 | - | 4.51 | 60,001 |
| British History Quiz for Dummies | 0 | - | 4.70 | 78,834 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 359,088 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 193,129 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 151,687 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 219,803 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,489 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 311,756 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 174,068 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 89,756 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,522 |
| Slavic Countries | 0 | - | 4.96 | 112,030 |
| Most Mentioned Allies of Russia | 0 | - | 4.49 | 38,108 |
| Most Mentioned Enemies of Russia | 0 | - | 4.69 | 90,191 |
| Russian History A-Z | 0 | - | 4.35 | 31,928 |
| French Geography Quiz #2 | 0 | - | 4.62 | 23,293 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.98 | 74,788 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 438,503 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,342 |
| Geography of Spain | 0 | - | 4.59 | 22,130 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,550 |
| Champions League Winners | 0 | - | 4.92 | 1,011,358 |
| Asia Geography Quiz #1 | 0 | - | 4.70 | 53,592 |
| Asia Geography Quiz #2 | 0 | - | 4.56 | 48,649 |
| Asia Geography Quiz #3 | 0 | - | 4.49 | 32,313 |
| Africa Geography Quiz #2 | 0 | - | 4.59 | 33,025 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 121,383 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 98,240 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 96,183 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 138,044 |
| Three Band Flags of Europe | 0 | - | 4.98 | 193,950 |
| Pixelated Europe Map | 0 | - | 4.88 | 123,128 |
| Monarchies of Europe | 0 | - | 4.90 | 98,481 |
| European Countries with One Border | 0 | - | 4.97 | 183,301 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 180,082 |
| European Geography By Letter - B #2 | 0 | - | 4.86 | 87,597 |
| Albania Country Quiz | 0 | - | 4.54 | 39,126 |
| Russian Inventions | 0 | - | 4.39 | 12,987 |
| Czech Republic Country Quiz | 0 | - | 4.52 | 42,337 |
| Ukraine Country Quiz | 0 | - | 4.43 | 47,864 |
| Hungary Country Quiz | 0 | - | 4.49 | 43,614 |
| Romania Country Quiz | 0 | - | 4.63 | 53,968 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,227 |
| Serbia Country Quiz | 0 | - | 4.44 | 35,125 |
| History of Austria | 0 | - | 4.70 | 17,928 |
| Regions of France Map Quiz | 0 | - | 4.97 | 145,017 |
| Geography of the French Empire | 0 | - | 4.45 | 27,178 |
| The French Revolution | 0 | - | 4.47 | 24,085 |
| Countries Bordering France | 0 | - | 4.83 | 403,946 |
| History of France | 0 | - | 4.61 | 57,373 |
| States of Germany Map Quiz | 0 | - | 4.92 | 133,367 |
| States of Germany | 0 | - | 4.95 | 153,647 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,525 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,392 |
| Countries Bordering Germany | 0 | - | 4.99 | 371,003 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 20,879 |
| Figures from Greek Mythology | 0 | - | 4.91 | 188,040 |
| Regions of Italy | 0 | - | 4.92 | 76,468 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,533 |
| The Vikings! | 0 | - | 4.46 | 28,380 |
| The Portuguese Empire | 0 | - | 4.58 | 12,088 |
| Regions of Spain Quiz | 0 | - | 4.90 | 114,745 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,504 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,272 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,426 |
| Countries the UK Declared War On | 0 | - | 4.55 | 123,001 |
| Geography of the British Empire | 0 | - | 4.48 | 39,785 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,777 |
| Asian Countries with the Shortest Names | 0 | - | 4.97 | 135,708 |
| Oceania Geography Quiz | 0 | - | 4.55 | 22,102 |
| South American Geography Quiz #1 | 0 | - | 4.62 | 32,753 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 175,069 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,713,397 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,388 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 193,475 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,405 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,237 |
| Top 10 European Countries by Coastline | 0 | - | 4.88 | 138,566 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,703 |
| European Geographic Groups of Four | 0 | - | 4.57 | 18,096 |
| Topological Map of Mainland Europe | 0 | - | 4.39 | 28,947 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 101,866 |
| Lithuania Country Quiz | 0 | - | 4.61 | 31,704 |
| Latvia Country Quiz | 0 | - | 4.77 | 32,123 |
| Andorra Country Quiz | 0 | - | 4.91 | 31,824 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,745 |
| France Cities Map Quiz | 0 | - | 4.96 | 167,341 |
| Departments of France | 0 | - | 4.93 | 54,658 |
| Countries that Visit France the Most | 0 | - | 4.85 | 46,014 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,329 |
| Germany Country Quiz | 0 | - | 4.83 | 158,376 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 126,772 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 97,717 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,133 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,979 |
| Counties of Ireland | 0 | - | 4.92 | 196,365 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 149,847 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 152,724 |
| Countries Bordering Italy | 0 | - | 4.94 | 101,082 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,491 |
| Countries Closest to Italy | 0 | - | 4.97 | 198,538 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,654 |
| Byzantine History | 0 | - | 4.91 | 28,955 |
| Byzantine Emperors | 0 | - | 4.92 | 14,438 |
| History of The Netherlands | 0 | - | 4.46 | 17,503 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,203 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 186,399 |
| Countries Closest to Spain | 0 | - | 4.96 | 227,567 |
| British Groups of Things | 0 | - | 4.25 | 82,943 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,069 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,208 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 131,560 |
| Medieval English History | 0 | - | 4.53 | 43,598 |
| World Capitals Closest to London | 0 | - | 4.88 | 110,877 |
| 50 Busiest Air Routes from London | 0 | - | 4.87 | 97,085 |
| England or Wales? | 0 | - | 4.94 | 45,844 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 131,309 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.86 | 110,535 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 97,270 |
| Name a Valid Asian Country | 0 | - | 4.98 | 121,379 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,196 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 92,768 |
| Name a Valid African Country | 0 | - | 4.98 | 154,569 |
| Countries that Beat the United States | 0 | - | 4.93 | 168,019 |
| U.S. History for Dummies | 0 | - | 4.47 | 83,250 |
| Countries that Beat Canada | 0 | - | 4.91 | 98,659 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,288 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,686 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 115,931 |
| Which City in Europe? | 0 | - | 4.83 | 107,681 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 64,488 |
| Slovenia Country Quiz | 0 | - | 4.55 | 30,826 |
| Poland Country Quiz | 0 | - | 4.20 | 63,502 |
| Slovakia Country Quiz | 0 | - | 4.64 | 30,792 |
| Bulgaria Country Quiz | 0 | - | 4.55 | 30,981 |
| Montenegro Country Quiz | 0 | - | 4.61 | 23,787 |
| Belarus Country Quiz | 0 | - | 4.74 | 27,417 |
