| Federal Subjects of Russia | 0 | - | 4.95 | 148,941 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 531,721 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 98,564 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,611 |
| European Geography By Letter - B #2 | 0 | - | 4.87 | 88,278 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 81,713 |
| Countries That Border Russia | 0 | - | 4.98 | 463,921 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,380 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 235,139 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 168,435 |
| Russia Country Quiz | 0 | - | 4.83 | 115,145 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,580 |
| Official European Union Languages | 0 | - | 4.97 | 239,447 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,449 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 430,192 |
| Russian History A-Z | 0 | - | 4.35 | 32,101 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 83,134 |
| Countries that Beat Russia | 0 | - | 4.81 | 83,396 |
| Europe Geography Decoder | 0 | - | 4.86 | 70,222 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 42,000 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,887 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 312,212 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 174,978 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,619 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,341 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 360,135 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,472 |
| Celtic Nations | 0 | - | 4.61 | 47,062 |
| European Geography By Letter - A | 0 | - | 4.52 | 147,663 |
| European Geography By Letter - B #1 | 0 | - | 4.62 | 121,044 |
| European Geography By Letter - C | 0 | - | 4.43 | 122,851 |
| European Geography By Letter - D | 0 | - | 4.50 | 110,052 |
| European Geography By Letter - L | 0 | - | 4.52 | 114,720 |
| European Geography By Letter - M | 0 | - | 4.69 | 132,051 |
| European Geography By Letter - N | 0 | - | 4.44 | 101,853 |
| European Geography By Letter - R | 0 | - | 4.43 | 94,366 |
| European Geography By Letter - V | 0 | - | 4.42 | 93,584 |
| European Geography By Letter - T | 0 | - | 4.41 | 83,274 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 101,204 |
| Most Mentioned Allies of Russia | 0 | - | 4.49 | 38,133 |
| Most Mentioned Enemies of Russia | 0 | - | 4.69 | 90,250 |
| Famous Germans | 0 | - | 4.50 | 55,670 |
| Famous Italians by Clue | 0 | - | 4.45 | 90,132 |
| Champions League Winners | 0 | - | 4.92 | 1,013,302 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,608 |
| Monarchies of Europe | 0 | - | 4.90 | 98,657 |
| States of Germany | 0 | - | 4.95 | 154,010 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,539 |
| Regions of Italy | 0 | - | 4.92 | 76,698 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,652 |
| Regions of Spain Quiz | 0 | - | 4.90 | 115,013 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,611 |
| United Kingdom A-Z | 0 | - | 4.51 | 88,267 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,806 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 66,881 |
| Monarchies of Asia | 0 | - | 4.97 | 71,389 |
| Asian Country Superlatives | 0 | - | 4.84 | 81,190 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 92,623 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 73,050 |
| European Geography By Letter - E | 0 | - | 4.23 | 114,789 |
| European Geography By Letter - F | 0 | - | 4.15 | 94,097 |
| European Geography By Letter - H | 0 | - | 4.30 | 96,900 |
| European Geography By Letter - G | 0 | - | 4.27 | 103,600 |
| European Geography By Letter - I | 0 | - | 4.07 | 96,298 |
| European Geography By Letter - K | 0 | - | 4.15 | 70,932 |
| European Geography By Letter - O | 0 | - | 4.29 | 63,348 |
| European Geography by Letter - W | 0 | - | 4.21 | 83,410 |
| European Geography By Letter - S #2 | 0 | - | 4.20 | 51,700 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 193,630 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,573 |
| European Geography A-Z | 0 | - | 4.29 | 49,434 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,694 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 278,466 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,622 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,506 |
| Famous French People | 0 | - | 4.07 | 36,005 |
| Departments of France | 0 | - | 4.93 | 54,862 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,703 |
| History of The Netherlands | 0 | - | 4.46 | 17,529 |
| British Acronyms | 0 | - | 4.40 | 45,899 |
| British Monopoly Board | 0 | - | 4.52 | 41,237 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 32,056 |
| Name the English Monarchs | 0 | - | 4.91 | 505,426 |
| England or Wales? | 0 | - | 4.94 | 45,897 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 131,649 |
| Top 10 Coldest Asian Countries | 0 | - | 4.95 | 123,634 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.86 | 110,781 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.93 | 87,739 |
| Top U.S. Universities | 0 | - | 4.15 | 145,632 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,572 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,708 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,699 |
| Word Scramble - European Countries | 0 | - | 4.73 | 142,159 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 116,270 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,764 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,790 |
| Slavic Languages | 0 | - | 4.68 | 54,617 |
| Countries that Border Poland | 0 | - | 4.99 | 172,953 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 166,262 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 102,304 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,893 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,995 |
| Moldova Country Quiz | 0 | - | 4.82 | 30,972 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,918 |
| French Geography Quiz #1 | 0 | - | 4.89 | 35,007 |
| France A-Z | 0 | - | 4.16 | 38,311 |
| The Trojan War | 0 | - | 4.83 | 39,933 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 650,728 |
| Name that Greek Letter | 0 | - | 4.93 | 324,674 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,679 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,705 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,485 |
| Roman Emperors | 0 | - | 4.95 | 120,901 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,591 |
| World's Biggest Financial Centers | 0 | - | 4.55 | 73,352 |
| Top 100 Greatest NBA Players | 0 | - | 4.41 | 695,929 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,176 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 125,691 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 126,312 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.83 | 62,143 |
| Top European Languages on a Map | 0 | - | 4.77 | 132,638 |
| Famous Russians | 0 | - | 4.16 | 23,891 |
| History of Russia Quiz | 0 | - | 4.47 | 31,985 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,835 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.86 | 96,698 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,212 |
| Olympian Gods Quiz | 0 | - | 4.96 | 502,992 |
| Famous Irish People | 0 | - | 4.05 | 46,052 |
| History of Italy | 0 | - | 4.55 | 32,110 |
| Italy Multiple Choice | 0 | - | 4.74 | 104,207 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,783 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,630 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,381 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,564 |
| People on Money - England | 0 | - | 4.29 | 16,635 |
| British Geography A-Z | 0 | - | 4.42 | 19,591 |
| London A-Z | 0 | - | 4.10 | 40,856 |
| Zone 1 London Underground Stations - With a Map | 0 | - | 4.90 | 52,669 |
| Random Sequential Oceanic Countries on a Map | 0 | - | 4.97 | 27,345 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 52,412 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 118,550 |
| Europe Map Quiz | 0 | - | 5.00 | 4,780,865 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,453 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 72,104 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,403 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,366 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 35,134 |
| Capitals of French Regions | 0 | - | 4.45 | 16,154 |
| Regions of France | 0 | - | 4.70 | 121,741 |
| France Immigration by Country | 0 | - | 4.70 | 76,831 |
| Kings of France Quiz | 0 | - | 4.20 | 32,878 |
| German Groups of Things | 0 | - | 4.47 | 38,596 |
| Capitals of German States | 0 | - | 4.74 | 29,036 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,496 |
| Germany True or False? | 0 | - | 4.61 | 48,962 |
| German History A-Z | 0 | - | 4.49 | 24,858 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,338 |
| Ancient Greek Words | 0 | - | 4.93 | 112,248 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,414 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,636 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,653 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,769 |
| Name Every Beatles Song | 0 | - | 4.97 | 237,876 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 292,568 |
| Famous Scottish People | 0 | - | 4.22 | 18,427 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 71,364 |
| Asian Geography by Letter - H | 0 | - | 4.50 | 65,959 |
| Asian Geography By Letter - M | 0 | - | 4.48 | 61,583 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 58,106 |
| Asian Geography by Letter - T | 0 | - | 4.52 | 57,570 |
| Asian Countries by First 2 Letters | 0 | - | 4.92 | 280,314 |
| Asian Geography By Letter - L | 0 | - | 4.49 | 43,233 |
| Asian Geography By Letter - O | 0 | - | 4.66 | 32,187 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 269,042 |
| Most Valuable Sports Teams | 0 | - | 4.33 | 117,227 |
| Top 100 MLB Baseball Players of All Time | 0 | - | 4.32 | 98,441 |
| Oceania Map Quiz | 0 | - | 4.98 | 657,923 |
| Australian Capitals | 0 | - | 4.92 | 62,804 |
| European Physical Geography | 0 | - | 4.26 | 33,572 |
| Albania Country Quiz | 0 | - | 4.54 | 39,183 |
| Geography of Russia | 0 | - | 4.57 | 21,574 |
| Czech Republic Country Quiz | 0 | - | 4.52 | 42,388 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 42,076 |
| Ukraine Country Quiz | 0 | - | 4.43 | 47,927 |
| Hungary Country Quiz | 0 | - | 4.49 | 43,688 |
| Romania Country Quiz | 0 | - | 4.63 | 54,031 |
| Serbia Country Quiz | 0 | - | 4.44 | 35,164 |
| History of Austria | 0 | - | 4.70 | 17,952 |
| Geography of the French Empire | 0 | - | 4.45 | 27,194 |
| The French Revolution | 0 | - | 4.47 | 24,111 |
| France Multiple Choice | 0 | - | 4.39 | 40,812 |
| History of France | 0 | - | 4.61 | 57,468 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,542 |
| Figures from Greek Mythology | 0 | - | 4.91 | 188,376 |
| Italian History A-Z | 0 | - | 4.16 | 17,880 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 439,076 |
| The Vikings! | 0 | - | 4.46 | 28,392 |
| Sweden Immigration by Country | 0 | - | 4.55 | 56,314 |
| The Portuguese Empire | 0 | - | 4.58 | 12,095 |
| Spanish History A-Z | 0 | - | 4.37 | 19,465 |
