| Federal Subjects of Russia | 0 | - | 4.95 | 146,802 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 529,161 |
| Countries that Beat Russia | 0 | - | 4.81 | 82,557 |
| Save Europeans by Guessing Countries | 0 | - | 4.83 | 212,700 |
| Countries That Border Russia | 0 | - | 4.98 | 461,396 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 174,318 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 232,924 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 276,513 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 166,896 |
| Russia Country Quiz | 0 | - | 4.85 | 114,371 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,057 |
| Official European Union Languages | 0 | - | 4.97 | 238,311 |
| European Countries in their Native Language | 0 | - | 4.99 | 157,727 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 427,850 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,786 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,746 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,931 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,794 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,375 |
| Celtic Nations | 0 | - | 4.69 | 46,921 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,240 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,903 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,327,202 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,192 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,211 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,307 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 310,210 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 171,057 |
| Most Mentioned Allies of Russia | 0 | - | 4.49 | 37,989 |
| Most Mentioned Enemies of Russia | 0 | - | 4.69 | 89,948 |
| German Groups of Things | 0 | - | 4.46 | 38,455 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,323 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,930 |
| Most Common First Names in Spain | 0 | - | 4.27 | 45,597 |
| Most Common Surnames in the UK | 0 | - | 4.21 | 69,654 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,152 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 355,219 |
| Africa Geography Quiz #1 | 0 | - | 4.93 | 49,311 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 121,020 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,011 |
| European Geography By Letter - B #2 | 0 | - | 4.84 | 78,103 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 80,836 |
| Russian History A-Z | 0 | - | 4.38 | 31,647 |
| States of Germany | 0 | - | 4.96 | 152,206 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,955 |
| Regions of Italy | 0 | - | 4.92 | 75,718 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,030 |
| Most Common Last Names in Sweden | 0 | - | 4.49 | 15,391 |
| Regions of Spain Quiz | 0 | - | 4.90 | 113,783 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,109 |
| Members of the British Royal Family | 0 | - | 4.10 | 114,035 |
| Champions League Winners | 0 | - | 4.92 | 1,005,427 |
| Asian Countries with the Shortest Names | 0 | - | 4.97 | 135,158 |
| Divided World City Name Puzzle #1 | 0 | - | 4.87 | 48,692 |
| Divided World City Name Puzzle #2 | 0 | - | 4.83 | 36,950 |
| Countries by Initial Letter and Continent #3 | 0 | - | 4.93 | 48,579 |
| Countries by Initial Letter and Continent #2 | 0 | - | 4.91 | 96,129 |
| U.S. State Nicknames | 0 | - | 4.47 | 50,478 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,447 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,682 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 92,222 |
| Name a Valid African Country | 0 | - | 4.98 | 153,917 |
| Hispanic Last Names in the U.S. | 0 | - | 4.31 | 54,736 |
| Europe Geography Quiz #3 | 0 | - | 4.35 | 63,643 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 260,468 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 114,519 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,287 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,317 |
| Departments of France | 0 | - | 4.93 | 53,971 |
| Word Chain - France | 0 | - | 4.38 | 42,762 |
| Italian Foods | 0 | - | 4.30 | 72,714 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,532 |
| British Groups of Things | 0 | - | 4.25 | 82,852 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,028 |
| England or Wales? | 0 | - | 4.94 | 45,641 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 130,115 |
| Asian Last Names in the United States | 0 | - | 4.43 | 46,737 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.86 | 109,865 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 96,679 |
| Name a Valid Asian Country | 0 | - | 4.98 | 120,884 |
| U.S. Baby Boy Names by Decade | 0 | - | 4.55 | 488,821 |
| U.S. Baby Girl Names by Decade | 0 | - | 4.42 | 712,276 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,582 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,649 |
| Word Scramble - European Countries | 0 | - | 4.73 | 141,588 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 114,738 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,393 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 89,927 |
| Slavic Languages | 0 | - | 4.68 | 54,311 |
| Countries that Border Poland | 0 | - | 4.99 | 172,157 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 100,528 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,151 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,830 |
| Moldova Country Quiz | 0 | - | 4.82 | 30,766 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,324 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 646,707 |
| Name that Greek Letter | 0 | - | 4.93 | 323,263 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,589 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,440 |
| Fictional Characters from Great Britain | 0 | - | 4.24 | 42,010 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 268,019 |
| Countries that Beat the United States | 0 | - | 4.93 | 166,750 |
| Countries that Beat Canada | 0 | - | 4.90 | 90,355 |
| Top European Languages on a Map | 0 | - | 4.77 | 131,959 |
| Famous Russians | 0 | - | 4.16 | 23,831 |
| History of Russia Quiz | 0 | - | 4.47 | 31,899 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,710 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 165,267 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.86 | 96,339 |
| French Geography Quiz #2 | 0 | - | 4.62 | 23,215 |
| Word Chain - Germany | 0 | - | 4.31 | 22,574 |
| The Trojan War | 0 | - | 4.83 | 39,678 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,676 |
| History of Italy | 0 | - | 4.55 | 31,959 |
| Word Chain - Italy | 0 | - | 4.07 | 23,157 |
| Italy Multiple Choice | 0 | - | 4.74 | 103,716 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,475 |
| Roman Emperors | 0 | - | 4.95 | 119,804 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,638 |
| Countries that Beat Iceland | 0 | - | 4.81 | 42,728 |
| Countries that Beat Portugal | 0 | - | 4.86 | 59,218 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,199 |
| Geography of Spain | 0 | - | 4.59 | 22,063 |
| Word Chain - United Kingdom | 0 | - | 4.05 | 29,333 |
| Name a Valid English City | 0 | - | 4.19 | 16,711 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 278,861 |
| Countries that Beat Indonesia | 0 | - | 4.86 | 55,773 |
| Last Names by Country of Origin | 0 | - | 4.63 | 156,422 |
| Africa Geography Quiz #2 | 0 | - | 4.59 | 32,953 |
| Random Sequential Oceanic Countries on a Map | 0 | - | 4.97 | 27,138 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,226 |
| European Geography By Letter - A | 0 | - | 4.52 | 145,672 |
| European Geography By Letter - B #1 | 0 | - | 4.68 | 112,744 |
| European Geography By Letter - C | 0 | - | 4.46 | 113,466 |
| European Geography By Letter - D | 0 | - | 4.50 | 108,181 |
| European Geography By Letter - L | 0 | - | 4.52 | 113,239 |
| European Geography By Letter - M | 0 | - | 4.67 | 130,298 |
| European Geography By Letter - P #1 | 0 | - | 4.80 | 97,327 |
| European Geography By Letter - N | 0 | - | 4.44 | 100,636 |
| European Geography By Letter - R | 0 | - | 4.42 | 93,541 |
| European Geography By Letter - V | 0 | - | 4.43 | 92,862 |
| European Geography By Letter - T | 0 | - | 4.41 | 82,235 |
| Europe Map Quiz | 0 | - | 5.00 | 4,758,778 |
| European Geography By Letter - S #1 | 0 | - | 4.54 | 100,440 |
| Four Letter European Geography #2 | 0 | - | 4.57 | 20,399 |
| Capitals of French Regions | 0 | - | 4.45 | 16,056 |
| Regions of France | 0 | - | 4.75 | 120,580 |
| France Immigration by Country | 0 | - | 4.70 | 76,454 |
| Famous Germans | 0 | - | 4.50 | 55,245 |
| Capitals of German States | 0 | - | 4.74 | 28,942 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,304 |
| Germany True or False? | 0 | - | 4.61 | 48,766 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,942 |
| Olympian Gods Quiz | 0 | - | 4.96 | 500,264 |
| Ancient Greek Words | 0 | - | 4.93 | 111,461 |
| Famous Italians by Clue | 0 | - | 4.45 | 89,396 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,298 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,247 |
| British to American Food Translation | 0 | - | 3.38 | 51,954 |
| Name Every Beatles Song | 0 | - | 4.97 | 235,909 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 291,568 |
| Asia Geography Quiz #1 | 0 | - | 4.70 | 53,495 |
| Asia Geography Quiz #2 | 0 | - | 4.56 | 48,533 |
| Asia Geography Quiz #3 | 0 | - | 4.49 | 32,238 |
| Nicknames in U.S. History | 0 | - | 4.25 | 31,708 |
| Most Popular Boy Names in the U.S. 2024 | 0 | - | 4.06 | 177,184 |
| NFL Football Last Names | 0 | - | 4.43 | 171,430 |
| Africa Map Quiz | 0 | - | 5.00 | 2,116,194 |
| Oceania Map Quiz | 0 | - | 4.98 | 641,377 |
| Australian Capitals | 0 | - | 4.92 | 62,713 |
| Word Chain - Australia | 0 | - | 4.38 | 38,129 |
| European Physical Geography | 0 | - | 4.26 | 33,490 |
| Albania Country Quiz | 0 | - | 4.54 | 38,958 |
| Geography of Russia | 0 | - | 4.57 | 21,519 |
| Czech Republic Country Quiz | 0 | - | 4.52 | 42,172 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 41,928 |
| Ukraine Country Quiz | 0 | - | 4.42 | 47,666 |
| Hungary Country Quiz | 0 | - | 4.49 | 43,382 |
| Romania Country Quiz | 0 | - | 4.63 | 53,726 |
| Serbia Country Quiz | 0 | - | 4.44 | 34,998 |
| History of Austria | 0 | - | 4.70 | 17,850 |
| Geography of the French Empire | 0 | - | 4.45 | 27,042 |
| The French Revolution | 0 | - | 4.46 | 23,922 |
| France Multiple Choice | 0 | - | 4.39 | 40,723 |
| History of France | 0 | - | 4.59 | 56,917 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 436,677 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,060 |
| The Vikings! | 0 | - | 4.46 | 28,334 |
| Sweden Immigration by Country | 0 | - | 4.55 | 56,087 |
| The Portuguese Empire | 0 | - | 4.58 | 12,056 |
| American to British Word Translation | 0 | - | 4.14 | 138,896 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,875 |
| United Kingdom A-Z | 0 | - | 4.51 | 87,619 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,635 |
| Champions League Top 4 | 0 | - | 4.77 | 136,121 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,447,548 |
| Asia Map Quiz | 0 | - | 4.99 | 915,616 |
| World City Nicknames Quiz | 0 | - | 4.16 | 35,571 |
| Political Figures by Last Name #1 | 0 | - | 4.56 | 67,933 |
| Actors by Last Name #1 | 0 | - | 4.28 | 68,528 |
