| Countries of the Japanese Empire | 0 | - | 4.97 | 103,862 |
| Countries Italy Declared War On | 0 | - | 4.75 | 42,954 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 148,953 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,428 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,421 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,115 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,617 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 105,904 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,520 |
| Name the English Monarchs | 0 | - | 4.92 | 497,923 |
| Asian Countries with the Most Christians | 0 | - | 4.85 | 96,273 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.85 | 113,253 |
| Europe Map Quiz | 0 | - | 5.00 | 4,731,484 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 88,972 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 98,493 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,681 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 641,955 |
| Name that Greek Letter | 0 | - | 4.94 | 321,676 |
| Prime Ministers of the UK | 0 | - | 4.96 | 434,660 |
| The Iraq War | 0 | - | 4.47 | 15,552 |
| Countries with the Most Hindus | 0 | - | 4.90 | 122,356 |
| Hindu Countries | 0 | - | 4.86 | 49,581 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 425,209 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,148 |
| Arms Exports - Russia | 0 | - | 4.48 | 24,764 |
| Olympian Gods Quiz | 0 | - | 4.96 | 496,173 |
| The Trojan War | 0 | - | 4.83 | 39,428 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,540 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,050 |
| Roman Emperors | 0 | - | 4.95 | 118,494 |
| Byzantine History | 0 | - | 4.91 | 28,620 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,440,517 |
| Asia Map Quiz | 0 | - | 4.99 | 907,057 |
| The Vietnam War | 0 | - | 4.43 | 35,295 |
| Biggest Trading Partners - China | 0 | - | 4.95 | 74,683 |
| Countries That Use the Euro | 0 | - | 4.96 | 103,005 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 362,311 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 113,565 |
| The Only European Country ... | 0 | - | 4.91 | 213,841 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 160,473 |
| European Countries NOT in NATO | 0 | - | 4.87 | 59,545 |
| Biggest Trading Partners - Russia | 0 | - | 4.55 | 36,334 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 93,549 |
| Ancient Greek Words | 0 | - | 4.92 | 110,705 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 433,558 |
| Countries Closest to Spain A-Z | 0 | - | 4.99 | 107,683 |
| South and Central Asia Map Quiz | 0 | - | 4.93 | 97,475 |
| Middle East Map Quiz | 0 | - | 4.99 | 1,375,939 |
| The Persian Gulf War | 0 | - | 4.02 | 8,401 |
| The American Revolution | 0 | - | 4.52 | 54,058 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,226,754 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,319,828 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 191,718 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 150,291 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 216,344 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 86,473 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 307,832 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 167,903 |
| Countries of Europe After World War II | 0 | - | 4.99 | 186,744 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 155,357 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,270 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,207 |
| Slavic Countries | 0 | - | 4.96 | 110,861 |
| History of Russia Quiz | 0 | - | 4.49 | 31,795 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,638 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 26,932 |
| Figures from Greek Mythology | 0 | - | 4.91 | 184,958 |
| History of Italy | 0 | - | 4.55 | 31,817 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,482 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 76,982 |
| Counties of England | 0 | - | 4.97 | 789,212 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,388 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,394 |
| Places Where Winston Churchill Said We Would Fight the Nazis | 0 | - | 4.57 | 14,546 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 349,938 |
| Champions League Winners | 0 | - | 4.92 | 996,383 |
| Flags of Asia Quiz | 0 | - | 4.99 | 605,606 |
| East Asia Cities Map Quiz | 0 | - | 4.96 | 109,345 |
| 10 Biggest Asian Countries by Area | 0 | - | 4.97 | 152,767 |
| 10 Southernmost Countries in Asia | 0 | - | 4.97 | 98,420 |
| 10 Easternmost Countries in Asia | 0 | - | 4.99 | 107,252 |
| Countries of Asia with Two or More Words | 0 | - | 4.96 | 125,708 |
| Asian Countries Ending in "IA" | 0 | - | 4.96 | 106,494 |
| Countries of the Middle East | 0 | - | 4.96 | 198,931 |
| Countries Kim Jong Un Has Been To | 0 | - | 4.95 | 32,216 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.68 | 55,178 |
| Countries with the Most Ascents of Mount Everest | 0 | - | 4.95 | 57,778 |
| Nepal Country Quiz | 0 | - | 4.95 | 37,331 |
| African Countries with the Most Christians | 0 | - | 4.94 | 74,864 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 119,365 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,682 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,044 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,336 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,250 |
| Top 10 Hottest European Countries | 0 | - | 4.89 | 126,122 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 95,043 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 136,399 |
| Three Band Flags of Europe | 0 | - | 4.98 | 191,862 |
| Least Forested Countries in Asia | 0 | - | 4.74 | 64,421 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 197,265 |
| Pixelated Europe Map | 0 | - | 4.88 | 121,815 |
| Monarchies of Europe | 0 | - | 4.90 | 97,322 |
| European Countries with One Border | 0 | - | 4.97 | 181,633 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 178,526 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 230,551 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 274,222 |
| European Geography By Letter - B #2 | 0 | - | 4.83 | 76,272 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 165,176 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 256,808 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 113,254 |
| Russia Country Quiz | 0 | - | 4.85 | 113,638 |
| Russia A-Z | 0 | - | 4.46 | 27,143 |
| Federal Subjects of Russia | 0 | - | 4.94 | 144,010 |
| Countries That Border Russia | 0 | - | 4.98 | 458,928 |
| Croatia Country Quiz | 0 | - | 4.83 | 42,854 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,206 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,038 |
| History of Austria | 0 | - | 4.70 | 17,748 |
| Regions of France Map Quiz | 0 | - | 4.97 | 143,131 |
| France Cities Map Quiz | 0 | - | 4.96 | 165,194 |
| Departments of France | 0 | - | 4.93 | 52,829 |
| Geography of the French Empire | 0 | - | 4.48 | 26,934 |
| The French Revolution | 0 | - | 4.46 | 23,785 |
| Countries Bordering France | 0 | - | 4.83 | 399,139 |
| History of France | 0 | - | 4.59 | 56,056 |
| Germany Country Quiz | 0 | - | 4.82 | 156,554 |
| States of Germany Map Quiz | 0 | - | 4.91 | 131,685 |
| Germany Cities Map Quiz | 0 | - | 4.86 | 125,150 |
| States of Germany | 0 | - | 4.96 | 150,059 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,384 |
| Germany Immigration by Country | 0 | - | 4.84 | 80,017 |
| Countries Bordering Germany | 0 | - | 4.99 | 367,062 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,779 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,771 |
| Regions of Italy | 0 | - | 4.92 | 74,729 |
| Italy Country Quiz | 0 | - | 4.82 | 122,213 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 148,387 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,080 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,369 |
| Countries in the Byzantine Empire | 0 | - | 4.95 | 71,734 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 43,816 |
| The Vikings! | 0 | - | 4.46 | 28,246 |
| The Portuguese Empire | 0 | - | 4.54 | 11,990 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 95,951 |
| Regions of Spain Quiz | 0 | - | 4.90 | 112,356 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 184,645 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,196 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 92,910 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,290 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,175 |
| Countries the UK Declared War On | 0 | - | 4.61 | 121,782 |
| Geography of the British Empire | 0 | - | 4.48 | 39,473 |
| Medieval English History | 0 | - | 4.53 | 43,321 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,407 |
| England or Wales? | 0 | - | 4.94 | 45,319 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 128,501 |
| 10 Asian Countries with the Most Tourists | 0 | - | 4.89 | 105,049 |
| Top 10 Coldest Asian Countries | 0 | - | 4.95 | 122,493 |
| Asian Countries with the Shortest Names | 0 | - | 4.97 | 134,361 |
| "Stan" Countries - Map Quiz | 0 | - | 4.98 | 133,784 |
| Top 10 Richest Countries in Asia | 0 | - | 4.73 | 104,800 |
| Pixelated Asia Map | 0 | - | 4.90 | 72,412 |
| Monarchies of Asia | 0 | - | 4.97 | 70,607 |
| Name a Valid Asian Country | 0 | - | 4.98 | 120,053 |
| Asian Country Superlatives | 0 | - | 4.84 | 80,433 |
| Countries Closest to the Persian Gulf | 0 | - | 4.93 | 82,981 |
| Syria Country Quiz | 0 | - | 4.81 | 32,314 |
| Countries with the Most Arabic Speakers | 0 | - | 4.92 | 79,458 |
| Countries in Southeast Asia With an Empty Map | 0 | - | 4.97 | 100,801 |
| China Cities Map Quiz | 0 | - | 4.93 | 104,047 |
| Provinces of China Map Quiz | 0 | - | 4.92 | 92,781 |
| Japan Country Quiz | 0 | - | 4.92 | 141,255 |
| Closest Countries to North Korea | 0 | - | 4.94 | 121,810 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 80,682 |
| Countries Closest to Taiwan | 0 | - | 4.81 | 92,786 |
| States of India Map Quiz | 0 | - | 4.82 | 26,039 |
| Countries Bordering India | 0 | - | 4.98 | 162,605 |
| Countries Closest to India | 0 | - | 4.97 | 102,211 |
| Top 10 Richest Countries in Africa | 0 | - | 4.85 | 75,180 |
| Biggest Trading Partners – Australia | 0 | - | 4.93 | 60,957 |
| Arms Exports - United States | 0 | - | 4.70 | 54,361 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,654,708 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,259 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 70,793 |
| Top 10 European Countries by Coastline | 0 | - | 4.89 | 137,855 |
| Top 10 Richest Countries in Europe | 0 | - | 4.91 | 148,157 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 64,843 |
| Biggest Trading Partners - European Union | 0 | - | 4.91 | 72,113 |
| Countries that Border Poland | 0 | - | 4.99 | 171,360 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 164,496 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,382 |
| Countries that Beat Russia | 0 | - | 4.84 | 81,902 |
| Countries that Border Hungary | 0 | - | 4.98 | 103,701 |
| Countries Bordering Serbia | 0 | - | 4.96 | 91,753 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,514 |
| Countries Bordering Austria | 0 | - | 4.97 | 117,780 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,537 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 71,807 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 46,603 |
| Germany A-Z | 0 | - | 4.56 | 62,319 |
