| Countries of the Japanese Empire | 0 | - | 4.97 | 103,847 |
| Countries Italy Declared War On | 0 | - | 4.75 | 42,932 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 148,895 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,384 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,344 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,069 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,606 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 105,835 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,512 |
| Name the English Monarchs | 0 | - | 4.92 | 497,756 |
| Asian Countries with the Most Christians | 0 | - | 4.85 | 96,204 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.85 | 113,209 |
| Europe Map Quiz | 0 | - | 5.00 | 4,730,141 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 88,937 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 98,366 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,665 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 641,713 |
| Name that Greek Letter | 0 | - | 4.94 | 321,588 |
| Prime Ministers of the UK | 0 | - | 4.96 | 434,481 |
| The Iraq War | 0 | - | 4.47 | 15,548 |
| Countries with the Most Hindus | 0 | - | 4.90 | 122,308 |
| Hindu Countries | 0 | - | 4.85 | 49,544 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 425,083 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,128 |
| Arms Exports - Russia | 0 | - | 4.48 | 24,763 |
| Olympian Gods Quiz | 0 | - | 4.96 | 495,795 |
| The Trojan War | 0 | - | 4.83 | 39,422 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,496 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,032 |
| Roman Emperors | 0 | - | 4.95 | 118,420 |
| Byzantine History | 0 | - | 4.91 | 28,610 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,439,458 |
| Asia Map Quiz | 0 | - | 4.99 | 906,730 |
| The Vietnam War | 0 | - | 4.43 | 35,287 |
| Biggest Trading Partners - China | 0 | - | 4.95 | 74,668 |
| Countries That Use the Euro | 0 | - | 4.96 | 102,908 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 362,243 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 113,482 |
| The Only European Country ... | 0 | - | 4.91 | 213,731 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 160,432 |
| European Countries NOT in NATO | 0 | - | 4.87 | 59,466 |
| Biggest Trading Partners - Russia | 0 | - | 4.55 | 36,332 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 93,528 |
| Ancient Greek Words | 0 | - | 4.92 | 110,645 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 433,419 |
| Countries Closest to Spain A-Z | 0 | - | 4.99 | 107,649 |
| South and Central Asia Map Quiz | 0 | - | 4.93 | 97,425 |
| Middle East Map Quiz | 0 | - | 4.99 | 1,375,632 |
| The Persian Gulf War | 0 | - | 4.02 | 8,399 |
| The American Revolution | 0 | - | 4.52 | 54,049 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,225,923 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,319,456 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 191,676 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 150,257 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 216,240 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 86,448 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 307,756 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 167,793 |
| Countries of Europe After World War II | 0 | - | 4.99 | 186,675 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 155,309 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,220 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,164 |
| Slavic Countries | 0 | - | 4.96 | 110,825 |
| History of Russia Quiz | 0 | - | 4.49 | 31,786 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,627 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 26,922 |
| Figures from Greek Mythology | 0 | - | 4.91 | 184,867 |
| History of Italy | 0 | - | 4.55 | 31,809 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,477 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 76,975 |
| Counties of England | 0 | - | 4.97 | 788,939 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,379 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,389 |
| Places Where Winston Churchill Said We Would Fight the Nazis | 0 | - | 4.57 | 14,544 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 349,693 |
| Champions League Winners | 0 | - | 4.92 | 995,971 |
| Flags of Asia Quiz | 0 | - | 4.99 | 605,261 |
| East Asia Cities Map Quiz | 0 | - | 4.96 | 109,327 |
| 10 Biggest Asian Countries by Area | 0 | - | 4.97 | 152,734 |
| 10 Southernmost Countries in Asia | 0 | - | 4.97 | 98,377 |
| 10 Easternmost Countries in Asia | 0 | - | 4.99 | 107,207 |
| Countries of Asia with Two or More Words | 0 | - | 4.96 | 125,672 |
| Asian Countries Ending in "IA" | 0 | - | 4.96 | 106,451 |
| Countries of the Middle East | 0 | - | 4.96 | 198,845 |
| Countries Kim Jong Un Has Been To | 0 | - | 4.95 | 32,189 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.68 | 55,159 |
| Countries with the Most Ascents of Mount Everest | 0 | - | 4.95 | 57,761 |
| Nepal Country Quiz | 0 | - | 4.95 | 37,317 |
| African Countries with the Most Christians | 0 | - | 4.94 | 74,844 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 119,343 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,670 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,028 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,312 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,215 |
| Top 10 Hottest European Countries | 0 | - | 4.89 | 126,090 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 95,021 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 136,329 |
| Three Band Flags of Europe | 0 | - | 4.98 | 191,806 |
| Least Forested Countries in Asia | 0 | - | 4.74 | 64,409 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 197,199 |
| Pixelated Europe Map | 0 | - | 4.88 | 121,764 |
| Monarchies of Europe | 0 | - | 4.90 | 97,287 |
| European Countries with One Border | 0 | - | 4.97 | 181,580 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 178,489 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 230,436 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 274,142 |
| European Geography By Letter - B #2 | 0 | - | 4.83 | 76,197 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 165,103 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 256,631 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 113,185 |
| Russia Country Quiz | 0 | - | 4.85 | 113,611 |
| Russia A-Z | 0 | - | 4.46 | 27,133 |
| Federal Subjects of Russia | 0 | - | 4.94 | 143,910 |
| Countries That Border Russia | 0 | - | 4.98 | 458,811 |
| Croatia Country Quiz | 0 | - | 4.83 | 42,829 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,161 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,023 |
| History of Austria | 0 | - | 4.70 | 17,743 |
| Regions of France Map Quiz | 0 | - | 4.97 | 143,085 |
| France Cities Map Quiz | 0 | - | 4.96 | 165,141 |
| Departments of France | 0 | - | 4.93 | 52,755 |
| Geography of the French Empire | 0 | - | 4.48 | 26,923 |
| The French Revolution | 0 | - | 4.46 | 23,774 |
| Countries Bordering France | 0 | - | 4.83 | 398,633 |
| History of France | 0 | - | 4.59 | 55,987 |
| Germany Country Quiz | 0 | - | 4.82 | 156,489 |
| States of Germany Map Quiz | 0 | - | 4.91 | 131,656 |
| Germany Cities Map Quiz | 0 | - | 4.86 | 125,114 |
| States of Germany | 0 | - | 4.96 | 149,966 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,382 |
| Germany Immigration by Country | 0 | - | 4.84 | 79,992 |
| Countries Bordering Germany | 0 | - | 4.99 | 366,949 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,762 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,765 |
| Regions of Italy | 0 | - | 4.92 | 74,672 |
| Italy Country Quiz | 0 | - | 4.82 | 122,154 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 148,325 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,034 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,357 |
| Countries in the Byzantine Empire | 0 | - | 4.95 | 71,718 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 43,785 |
| The Vikings! | 0 | - | 4.45 | 28,244 |
| The Portuguese Empire | 0 | - | 4.54 | 11,987 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 95,932 |
| Regions of Spain Quiz | 0 | - | 4.90 | 112,281 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 184,610 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,105 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 92,884 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,213 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,167 |
| Countries the UK Declared War On | 0 | - | 4.61 | 121,750 |
| Geography of the British Empire | 0 | - | 4.48 | 39,467 |
| Medieval English History | 0 | - | 4.53 | 43,311 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,400 |
| England or Wales? | 0 | - | 4.94 | 45,306 |
| All UEFA Champions League Teams Ever | 0 | - | 4.84 | 128,425 |
| 10 Asian Countries with the Most Tourists | 0 | - | 4.89 | 104,998 |
| Top 10 Coldest Asian Countries | 0 | - | 4.95 | 122,482 |
| Asian Countries with the Shortest Names | 0 | - | 4.97 | 134,321 |
| "Stan" Countries - Map Quiz | 0 | - | 4.98 | 133,705 |
| Top 10 Richest Countries in Asia | 0 | - | 4.73 | 104,767 |
| Pixelated Asia Map | 0 | - | 4.90 | 72,372 |
| Monarchies of Asia | 0 | - | 4.97 | 70,586 |
| Name a Valid Asian Country | 0 | - | 4.98 | 120,019 |
| Asian Country Superlatives | 0 | - | 4.84 | 80,421 |
| Countries Closest to the Persian Gulf | 0 | - | 4.93 | 82,968 |
| Syria Country Quiz | 0 | - | 4.81 | 32,293 |
| Countries with the Most Arabic Speakers | 0 | - | 4.92 | 79,427 |
| Countries in Southeast Asia With an Empty Map | 0 | - | 4.97 | 100,775 |
| China Cities Map Quiz | 0 | - | 4.93 | 104,002 |
| Provinces of China Map Quiz | 0 | - | 4.92 | 92,753 |
| Japan Country Quiz | 0 | - | 4.92 | 141,197 |
| Closest Countries to North Korea | 0 | - | 4.94 | 121,776 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 80,646 |
| Countries Closest to Taiwan | 0 | - | 4.81 | 92,766 |
| States of India Map Quiz | 0 | - | 4.82 | 26,017 |
| Countries Bordering India | 0 | - | 4.98 | 162,579 |
| Countries Closest to India | 0 | - | 4.97 | 102,195 |
| Top 10 Richest Countries in Africa | 0 | - | 4.85 | 75,155 |
| Biggest Trading Partners – Australia | 0 | - | 4.93 | 60,940 |
| Arms Exports - United States | 0 | - | 4.70 | 54,326 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,652,742 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,218 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 70,781 |
| Top 10 European Countries by Coastline | 0 | - | 4.89 | 137,827 |
| Top 10 Richest Countries in Europe | 0 | - | 4.91 | 148,112 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 64,778 |
| Biggest Trading Partners - European Union | 0 | - | 4.91 | 72,091 |
| Countries that Border Poland | 0 | - | 4.99 | 171,309 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 164,444 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,360 |
| Countries that Beat Russia | 0 | - | 4.84 | 81,862 |
| Countries that Border Hungary | 0 | - | 4.98 | 103,674 |
| Countries Bordering Serbia | 0 | - | 4.96 | 91,719 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,507 |
| Countries Bordering Austria | 0 | - | 4.97 | 117,751 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,510 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 71,786 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 46,575 |
| Germany A-Z | 0 | - | 4.56 | 62,311 |
