| Name the English Monarchs | 0 | - | 4.91 | 503,933 |
| Monarchies of Europe | 0 | - | 4.90 | 98,353 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 61,294 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,505 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 32,194 |
| The Trojan War | 0 | - | 4.83 | 39,797 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,240 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,650 |
| Roman Emperors | 0 | - | 4.95 | 120,388 |
| Countries that Beat Portugal | 0 | - | 4.86 | 59,512 |
| European Geography By Letter - B #2 | 0 | - | 4.86 | 86,372 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,748 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 83,406 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,098 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,317 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,136 |
| Kings of France Quiz | 0 | - | 4.20 | 32,816 |
| Monarchies of Asia | 0 | - | 4.97 | 71,223 |
| Europe Map Quiz | 0 | - | 5.00 | 4,771,036 |
| Countries Bordering France | 0 | - | 4.83 | 403,545 |
| Countries Bordering Germany | 0 | - | 4.99 | 370,675 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,844 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,769 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 193,346 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,258 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,579 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 233,910 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 167,625 |
| Andorra Country Quiz | 0 | - | 4.91 | 31,776 |
| France Cities Map Quiz | 0 | - | 4.96 | 167,150 |
| Departments of France | 0 | - | 4.93 | 54,458 |
| Germany Country Quiz | 0 | - | 4.83 | 158,174 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 126,626 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 149,658 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 152,526 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,614 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,118 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 186,208 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,978 |
| England or Wales? | 0 | - | 4.94 | 45,796 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,070 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 429,028 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,851 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,660 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,964 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,283 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 97,360 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,177 |
| Counties of Ireland | 0 | - | 4.92 | 196,052 |
| Countries Bordering Italy | 0 | - | 4.94 | 101,020 |
| Countries Closest to Italy | 0 | - | 4.97 | 198,351 |
| Portugal Country Quiz | 0 | - | 4.69 | 72,026 |
| Countries Closest to Spain | 0 | - | 4.96 | 227,359 |
| United Kingdom A-Z | 0 | - | 4.52 | 88,154 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 131,264 |
| World Capitals Closest to London | 0 | - | 4.88 | 110,797 |
| 50 Busiest Air Routes from London | 0 | - | 4.87 | 97,003 |
| Countries that Beat Germany | 0 | - | 4.94 | 106,731 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,073 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,947 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 648,868 |
| Name that Greek Letter | 0 | - | 4.93 | 324,161 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,416 |
| Countries that Beat Italy | 0 | - | 4.85 | 54,649 |
| Countries that Beat Spain | 0 | - | 4.94 | 63,062 |
| British Monopoly Board | 0 | - | 4.52 | 41,194 |
| English Royal Consorts | 0 | - | 4.38 | 37,409 |
| Medieval English History | 0 | - | 4.53 | 43,571 |
| Countries That Use the Euro | 0 | - | 4.95 | 105,566 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 365,035 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 115,676 |
| The Only European Country ... | 0 | - | 4.91 | 217,389 |
| European Countries NOT in NATO | 0 | - | 4.90 | 61,579 |
| History of Russia Quiz | 0 | - | 4.47 | 31,949 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 73,891 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,710 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 126,505 |
| History of Italy | 0 | - | 4.55 | 32,053 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,791 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,992 |
| Roman Names for Places | 0 | - | 4.62 | 58,397 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,719 |
| History of The Netherlands | 0 | - | 4.46 | 17,484 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,295 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,955 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,940 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,206 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 38,001 |
| Zone 1 London Underground Stations - With a Map | 0 | - | 4.90 | 52,488 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,248,533 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,330,733 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 192,924 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 151,434 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 219,370 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,358 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 311,220 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 173,002 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 89,557 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,397 |
| Slavic Countries | 0 | - | 4.96 | 111,880 |
| Olympian Gods Quiz | 0 | - | 4.96 | 501,877 |
| Ancient Greek Words | 0 | - | 4.93 | 111,906 |
| Italian History A-Z | 0 | - | 4.21 | 17,739 |
| Spanish History A-Z | 0 | - | 4.37 | 19,323 |
| Counties of England | 0 | - | 4.97 | 798,855 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 358,168 |
| European Geography By Letter - A | 0 | - | 4.52 | 146,940 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 120,340 |
| European Geography By Letter - C | 0 | - | 4.46 | 114,735 |
| European Geography By Letter - D | 0 | - | 4.50 | 109,289 |
| European Geography By Letter - L | 0 | - | 4.52 | 113,965 |
| European Geography By Letter - M | 0 | - | 4.67 | 131,290 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 97,912 |
| European Geography By Letter - N | 0 | - | 4.44 | 101,185 |
| European Geography By Letter - R | 0 | - | 4.42 | 93,991 |
| European Geography By Letter - V | 0 | - | 4.42 | 93,266 |
| European Geography By Letter - T | 0 | - | 4.41 | 82,811 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 100,869 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 35,051 |
| Russian History A-Z | 0 | - | 4.35 | 31,862 |
| The Reign of Napoleon | 0 | - | 4.54 | 39,024 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.98 | 74,593 |
| Famous Irish People | 0 | - | 4.05 | 46,022 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 438,005 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,276 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,339 |
| UK Cities Map Quiz | 0 | - | 4.96 | 465,155 |
| British Geography A-Z | 0 | - | 4.42 | 19,559 |
| Embarrassing Chapters in British History | 0 | - | 4.29 | 32,298 |
| The Reign of Henry VIII | 0 | - | 4.25 | 27,799 |
| British History A-Z #1 | 0 | - | 4.45 | 46,583 |
| British History Quiz for Dummies | 0 | - | 4.70 | 78,747 |
| Elizabeth I... or Elizabeth II? | 0 | - | 4.30 | 24,531 |
| History of Scotland | 0 | - | 4.51 | 21,127 |
| London A-Z | 0 | - | 4.10 | 40,815 |
| Champions League Winners | 0 | - | 4.92 | 1,009,847 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,753 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 96,042 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 137,850 |
| Three Band Flags of Europe | 0 | - | 4.98 | 193,702 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,387 |
| Pixelated Europe Map | 0 | - | 4.88 | 122,986 |
| European Countries with One Border | 0 | - | 4.97 | 183,117 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 179,896 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 81,300 |
| Federal Subjects of Russia | 0 | - | 4.95 | 147,997 |
| Countries That Border Russia | 0 | - | 4.98 | 462,820 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,094 |
| History of Austria | 0 | - | 4.70 | 17,904 |
| Austria Country Quiz | 0 | - | 4.57 | 59,838 |
| Belgium Country Quiz | 0 | - | 4.72 | 71,935 |
| France Country Quiz | 0 | - | 4.70 | 135,181 |
| Regions of France Map Quiz | 0 | - | 4.97 | 144,836 |
| Geography of the French Empire | 0 | - | 4.45 | 27,155 |
| The French Revolution | 0 | - | 4.47 | 24,064 |
| History of France | 0 | - | 4.59 | 57,270 |
| French History A-Z | 0 | - | 4.27 | 24,760 |
| States of Germany Map Quiz | 0 | - | 4.92 | 133,161 |
| States of Germany | 0 | - | 4.95 | 153,181 |
| Germany Immigration by Country | 0 | - | 4.85 | 81,283 |
| Greece Country Quiz | 0 | - | 4.74 | 66,365 |
| The Life of Alexander the Great | 0 | - | 4.51 | 18,520 |
| Regions of Italy | 0 | - | 4.92 | 76,232 |
| Italy Country Quiz | 0 | - | 4.77 | 123,591 |
| Seven Hills of Rome | 0 | - | 4.70 | 9,203 |
| Luxembourg Country Quiz | 0 | - | 4.78 | 33,822 |
| Monaco Country Quiz | 0 | - | 4.47 | 41,568 |
| Netherlands Country Quiz | 0 | - | 4.53 | 80,653 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,423 |
| Nordic Cities Map Quiz | 0 | - | 4.77 | 90,551 |
| The Vikings! | 0 | - | 4.46 | 28,368 |
| Sweden Immigration by Country | 0 | - | 4.55 | 56,211 |
| The Portuguese Empire | 0 | - | 4.58 | 12,082 |
| Spain Country Quiz | 0 | - | 4.44 | 128,774 |
| Regions of Spain Quiz | 0 | - | 4.90 | 114,406 |
| Switzerland Country Quiz | 0 | - | 4.51 | 63,455 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,414 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,151 |
| Largest Islands in the British Isles With a Map | 0 | - | 4.52 | 38,766 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,544 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,404 |
| Countries the UK Declared War On | 0 | - | 4.55 | 122,668 |
| Geography of the British Empire | 0 | - | 4.48 | 39,734 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,754 |
| Counties of Wales | 0 | - | 4.63 | 39,384 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 66,706 |
| Asian Country Superlatives | 0 | - | 4.84 | 81,021 |
| Battle to Country | 0 | - | 4.91 | 53,528 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,079 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 92,599 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 92,383 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,936 |
| European Geography By Letter - E | 0 | - | 4.23 | 114,229 |
| European Geography By Letter - F | 0 | - | 4.17 | 93,587 |
| European Geography By Letter - H | 0 | - | 4.30 | 96,438 |
| European Geography By Letter - G | 0 | - | 4.27 | 103,130 |
| European Geography By Letter - I | 0 | - | 4.09 | 95,874 |
| European Geography By Letter - K | 0 | - | 4.14 | 70,507 |
| European Geography By Letter - O | 0 | - | 4.29 | 62,993 |
| European Geography by Letter - W | 0 | - | 4.21 | 83,129 |
