| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,029,098 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 80,560 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 111,167 |
| Countries within the Arctic Circle - Map Quiz | 0 | - | 4.85 | 51,012 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,040,758 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,364,215 |
| Landlocked Countries Quiz | 0 | - | 4.99 | 318,637 |
| Countries of the World Quiz | 0 | - | 5.00 | 40,551,433 |
| Countries of the World in 1900 | 0 | - | 4.88 | 65,269 |
| Countries of the World in 1914 with a Map | 0 | - | 4.99 | 169,113 |
| All Countries by Northernmost Point on Land | 0 | - | 4.91 | 105,432 |
| 20 Countries on an Empty Map #1 | 0 | - | 4.94 | 53,639 |
| Countries of the World in 1945 with a Map | 0 | - | 5.00 | 126,579 |
| Countries on the Equator | 0 | - | 4.83 | 133,159 |
| Members of the Arab League | 0 | - | 4.83 | 59,702 |
| Sahara Desert Countries | 0 | - | 4.97 | 125,428 |
| Himalayan Countries | 0 | - | 4.95 | 102,791 |
| Andean Countries | 0 | - | 4.90 | 57,125 |
| Countries with the Oldest Median Age | 0 | - | 4.85 | 57,981 |
| Countries with the Youngest Median Age | 0 | - | 4.98 | 48,651 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 102,002 |
| Coffee Producing Countries | 0 | - | 4.82 | 53,626 |
| Countries with Shrinking Populations | 0 | - | 4.93 | 52,821 |
| Danube Countries | 0 | - | 4.97 | 56,401 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 91,439 |
| Countries With an "Ese" Demonym | 0 | - | 4.96 | 64,638 |
| Countries with the Best Passports | 0 | - | 4.87 | 70,508 |
| Countries with the Worst Passports | 0 | - | 4.87 | 48,897 |
| Countries with the Most Immigrants | 0 | - | 4.87 | 108,527 |
| European Landlocked Countries | 0 | - | 4.99 | 114,891 |
| Partially Recognized Countries | 0 | - | 4.98 | 88,862 |
| Countries with the Most Species | 0 | - | 4.99 | 89,114 |
| Countries 197 to 205 | 0 | - | 4.88 | 55,935 |
| Tropic of Cancer Countries | 0 | - | 4.96 | 44,479 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 43,850 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 47,837 |
| Countries that Use the Peso | 0 | - | 4.81 | 46,169 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.87 | 58,499 |
| Countries with a AAA Credit Rating | 0 | - | 4.89 | 48,765 |
| Countries in the Alps | 0 | - | 4.83 | 101,979 |
| Top Five Importing Partners by Country | 0 | - | 4.98 | 84,781 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 86,023 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 71,198 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 77,827 |
| Northernmost Countries by Continent | 0 | - | 4.97 | 93,464 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.91 | 87,152 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 89,156 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 45,828 |
| Biggest Country by Body of Water | 0 | - | 4.96 | 45,107 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 54,246 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.88 | 68,999 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 48,375 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 36,466 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 95,070 |
| Arctic Ocean Countries | 0 | - | 4.93 | 71,572 |
| Countries with the Most Grassland | 0 | - | 4.93 | 69,067 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 96,864 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 61,015 |
| Countries that Host the Most Refugees | 0 | - | 4.93 | 53,026 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 193,481 |
| World Countries - Blind Typing | 0 | - | 5.00 | 71,676 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 42,013 |
| Largest Countries By Category | 0 | - | 4.96 | 144,064 |
| Countries by Countries | 0 | - | 4.96 | 54,190 |
| Country Flags with the Most White | 0 | - | 4.90 | 107,856 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 58,440 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.86 | 44,488 |
| All Countries by Population With a Map | 0 | - | 4.98 | 60,928 |
| Six Degrees of Separation - Countries #1 | 0 | - | 4.96 | 76,111 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 77,520 |
| Pixelated World Map | 0 | - | 5.00 | 127,139 |
| Countries of Europe in 1444 | 0 | - | 4.92 | 86,226 |
| Countries of the World with a Borderless Map | 0 | - | 4.99 | 68,825 |
| Spanish-Speaking Countries | 0 | - | 4.94 | 338,992 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 352,439 |
| Island Countries Quiz | 0 | - | 4.99 | 639,509 |
| Biggest Countries by Area | 0 | - | 5.00 | 926,319 |
| Northernmost Countries | 0 | - | 4.99 | 325,647 |
| Countries of South America | 0 | - | 5.00 | 785,279 |
| Countries of Oceania | 0 | - | 5.00 | 884,189 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,116,706 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,555,545 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 124,447 |
| Countries with Megacities | 0 | - | 4.99 | 195,177 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 169,806 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 97,032 |
| Countries With More than 200 Million People | 0 | - | 4.93 | 93,942 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.97 | 62,905 |
| Top 50 Countries by Population - In Order | 0 | - | 4.97 | 245,607 |
| Global Cities on a World Map | 0 | - | 4.93 | 90,836 |
| Countries by Official Language | 0 | - | 4.95 | 153,694 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.92 | 247,194 |
| Countries in their Native Language | 0 | - | 4.98 | 177,213 |
| Independence from Whom | 0 | - | 4.99 | 184,050 |
| Subdivisions by Country | 0 | - | 4.82 | 46,243 |
| Who Controlled These Colonies? | 0 | - | 4.89 | 112,485 |
| Megadiverse Countries | 0 | - | 4.96 | 124,864 |
| Countries With the Most English Speakers | 0 | - | 4.87 | 90,176 |
| Countries with Multiple Big Islands | 0 | - | 4.92 | 106,103 |
| Most Desired Destinations for Potential Migrants | 0 | - | 4.82 | 47,166 |
| 15 Biggest Island Countries | 0 | - | 4.99 | 130,238 |
| Most Recently-Settled Countries | 0 | - | 4.92 | 48,816 |
| Countries of the World in 1938 Quiz | 0 | - | 4.96 | 77,053 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.95 | 144,409 |
| Countries with Multiple Populous Islands | 0 | - | 4.91 | 76,596 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 41,104 |
| Countries by Sports League Revenue | 0 | - | 4.87 | 43,159 |
| Landmarks of Countries #1 | 0 | - | 4.89 | 100,899 |
| Countries Furthest from the United States | 0 | - | 4.94 | 71,547 |
| Countries with the Highest HDI | 0 | - | 4.95 | 130,535 |
| Straight Shot to the Arctic Circle | 0 | - | 4.92 | 68,091 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 64,840 |
| Mediterranean Countries with an Empty Map | 0 | - | 4.99 | 84,549 |
| World Map Quiz | 0 | - | 4.90 | 48,319 |
| Smallest Countries with at Least One Border | 0 | - | 4.91 | 80,893 |
| Countries by Founding Story | 0 | - | 4.92 | 54,416 |
| Countries by Road Signs | 0 | - | 4.98 | 44,810 |
| Southernmost Countries of the World | 0 | - | 4.99 | 205,573 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 90,268 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.90 | 107,233 |
| Countries With the Most Languages | 0 | - | 4.90 | 171,949 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.92 | 86,673 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.85 | 70,992 |
| Countries with the Most Prisoners | 0 | - | 4.93 | 85,631 |
| Countries with the Most Domestic Camels | 0 | - | 4.92 | 53,410 |
| Tallest Countries North to South | 0 | - | 4.84 | 109,958 |
| Widest Countries East to West | 0 | - | 4.93 | 118,833 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 68,718 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 158,053 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 92,166 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.96 | 84,912 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 118,244 |
| Countries with the Most Desert | 0 | - | 4.92 | 104,648 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 66,300 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 31,895 |
| Countries with Double Letters | 0 | - | 4.96 | 67,267 |
| Countries that End in N | 0 | - | 4.94 | 131,722 |
| Countries with Five Letters Quiz | 0 | - | 4.96 | 228,446 |
| Countries with Six Letters Quiz | 0 | - | 4.95 | 185,982 |
| Countries with W | 0 | - | 4.97 | 121,951 |
| Countries with Z | 0 | - | 4.98 | 243,130 |
| Countries with Letters Missing | 0 | - | 4.97 | 154,842 |
| Countries That End in U | 0 | - | 4.94 | 107,157 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 88,571 |
| Countries that End in O | 0 | - | 4.92 | 146,542 |
| Countries that End in R | 0 | - | 4.86 | 96,220 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 146,959 |
| Countries Ending in "IA" | 0 | - | 4.99 | 170,251 |
| Countries by First and Last Letter #1 | 0 | - | 4.98 | 155,046 |
| Countries by Last Two Letters | 0 | - | 4.90 | 115,725 |
| Countries by First and Last Letter #2 | 0 | - | 4.94 | 128,660 |
| Countries That End in Y | 0 | - | 4.90 | 161,332 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 159,853 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.91 | 120,008 |
| Countries that End in I | 0 | - | 4.92 | 114,232 |
| Countries Based on First Two Letters #2 | 0 | - | 4.98 | 148,646 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 87,923 |
| Countries That End in NIA | 0 | - | 4.93 | 100,437 |
| Countries That End in BIA | 0 | - | 4.91 | 125,501 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.93 | 152,537 |
| Countries Whose Names Start with Saint | 0 | - | 4.88 | 109,187 |
| Countries That End in RIA | 0 | - | 4.89 | 100,560 |
| Most Common Words in Official Country Names | 0 | - | 4.85 | 99,876 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 199,093 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 118,856 |
| Divided Country Name Puzzle #3 | 0 | - | 4.93 | 109,687 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 4.99 | 76,570 |
| Countries with a Unique Last Letter | 0 | - | 4.91 | 91,667 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 96,089 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 42,473 |
| Countries with the Word "And" | 0 | - | 4.98 | 82,753 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 39,960 |
| Countries that End in L | 0 | - | 4.95 | 133,509 |
| "Land" Countries | 0 | - | 4.98 | 288,156 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 187,978 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.96 | 65,095 |
| City to Country Quiz #1 | 0 | - | 4.94 | 133,873 |
| City to Country Quiz #3 | 0 | - | 4.86 | 99,836 |
| 45 European Countries, 45 Cities | 0 | - | 4.94 | 71,196 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 206,602 |
| Five Poorest Countries by Continent | 0 | - | 4.94 | 162,292 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 115,867 |
| Five Smallest Countries by Continent | 0 | - | 4.97 | 131,851 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.92 | 192,324 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 140,159 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 65,544 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.83 | 91,734 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 81,975 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.93 | 55,666 |
| All First-Level Subdivisions of Europe by Proximity | 0 | - | 4.82 | 65,384 |
| Top World Languages on a Map | 0 | - | 4.91 | 92,523 |
| Official Languages of the World on the Disappearing World Map | 0 | - | 4.99 | 97,333 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 39,414 |
| Biggest Countries by Population | 0 | - | 4.99 | 1,304,062 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 347,869 |
| One Border Countries | 0 | - | 4.98 | 407,142 |
| Countries of Europe in 1000 with a Map | 0 | - | 4.79 | 35,662 |
| Every Country in its Official/Native Language | 0 | - | 4.96 | 16,969 |
| Countries With One Word and Three A's | 0 | - | 4.84 | 30,335 |
| 407 Islands on the World Map | 0 | - | 4.98 | 27,556 |
