| Countries of the World Quiz | 0 | - | 5.00 | 47,052,330 |
| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 109,573 |
| Landlocked Countries | 0 | - | 4.99 | 415,304 |
| Countries with Glaciers | 0 | - | 4.97 | 104,765 |
| Countries with the Most Forest | 0 | - | 4.87 | 146,776 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.89 | 64,337 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,730,360 |
| Sahara Desert Countries | 0 | - | 4.98 | 161,267 |
| Himalayan Countries | 0 | - | 4.95 | 135,953 |
| Andean Countries | 0 | - | 4.94 | 83,162 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 62,483 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 123,619 |
| Coffee Producing Countries | 0 | - | 4.83 | 66,180 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 64,824 |
| Danube Countries | 0 | - | 4.97 | 71,260 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 115,990 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 85,709 |
| Countries with the Worst Passports | 0 | - | 4.94 | 82,852 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 147,794 |
| European Landlocked Countries | 0 | - | 4.99 | 145,956 |
| Partially Recognized Countries | 0 | - | 4.98 | 105,508 |
| Countries with the Most Species | 0 | - | 4.99 | 95,343 |
| Countries 197 to 205 | 0 | - | 4.89 | 69,637 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,268 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,439 |
| Countries that Use the Peso | 0 | - | 4.88 | 59,064 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 72,715 |
| Countries with a AAA Credit Rating | 0 | - | 4.85 | 57,071 |
| Countries in the Alps | 0 | - | 4.86 | 117,111 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 94,754 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 105,581 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,157 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 95,582 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 115,373 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.91 | 95,134 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 99,792 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 52,894 |
| Largest Country by Body of Water | 0 | - | 4.96 | 57,684 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,203 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,272 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,137 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,612 |
| Arctic Ocean Countries | 0 | - | 4.95 | 78,875 |
| Countries with the Most Grassland | 0 | - | 4.93 | 76,888 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 117,447 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 67,795 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,350 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,021 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 240,232 |
| World Countries - Blind Typing | 0 | - | 5.00 | 106,173 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 47,725 |
| Largest Countries By Category | 0 | - | 4.97 | 157,017 |
| Countries by Countries | 0 | - | 4.96 | 62,438 |
| Country Flags with the Most White | 0 | - | 4.87 | 137,658 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,022 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,376 |
| All Countries by Population With a Map | 0 | - | 4.98 | 107,280 |
| Six Degrees of Separation - Countries #1 | 0 | - | 4.96 | 98,268 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 87,933 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 325,767 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 372,778 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 402,737 |
| Island Countries | 0 | - | 4.99 | 708,300 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,041,620 |
| Northernmost Countries | 0 | - | 4.99 | 358,666 |
| Countries of South America | 0 | - | 5.00 | 917,712 |
| Countries of Oceania | 0 | - | 5.00 | 1,044,049 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,854,113 |
| "Land" Countries | 0 | - | 4.98 | 334,082 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,366,888 |
| Elements Named for Countries | 0 | - | 4.52 | 24,481 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 171,889 |
| Countries with Megacities | 0 | - | 4.99 | 248,139 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 197,770 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 112,349 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 136,155 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 80,287 |
| Countries by Official Language | 0 | - | 4.95 | 193,167 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 293,695 |
| Countries in their Native Language | 0 | - | 4.99 | 196,995 |
| Independence from Whom | 0 | - | 4.99 | 210,136 |
| Subdivisions by Country | 0 | - | 4.86 | 50,147 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,053 |
| Megadiverse Countries | 0 | - | 4.96 | 134,433 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 130,164 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,009 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,540 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 74,904 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 161,876 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,120 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,319 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,442 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,299 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 44,785 |
| Countries by Sports League Revenue | 0 | - | 4.95 | 75,907 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,516 |
| Countries Furthest from the United States | 0 | - | 4.94 | 88,619 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,581 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 74,793 |
| Most Dispersed Island Nations | 0 | - | 4.96 | 71,119 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 109,123 |
| World Map Quiz | 0 | - | 4.81 | 63,789 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 153,615 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 106,581 |
| Countries by Founding Story | 0 | - | 4.95 | 76,712 |
| Countries by Road Signs | 0 | - | 4.98 | 53,271 |
| Southernmost Countries of the World | 0 | - | 4.99 | 226,771 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 104,515 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,236 |
| Countries With the Most Languages | 0 | - | 4.89 | 200,310 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,108 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,307 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,498 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,076 |
| Tallest Countries North to South | 0 | - | 4.83 | 119,524 |
| Widest Countries East to West | 0 | - | 4.92 | 129,021 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,283 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 185,476 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 97,650 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 93,861 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 147,818 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,225 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 76,636 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.84 | 34,641 |
| Countries with Double Letters | 0 | - | 4.96 | 93,679 |
| Countries that End in N | 0 | - | 4.94 | 157,138 |
| Countries with Five Letters Quiz | 0 | - | 4.96 | 259,028 |
| Countries with Six Letters | 0 | - | 4.93 | 210,685 |
| Countries with W | 0 | - | 4.97 | 158,417 |
| Countries with Z | 0 | - | 4.98 | 288,238 |
| Countries with Letters Missing | 0 | - | 4.97 | 184,754 |
| Countries That End in U | 0 | - | 4.95 | 119,612 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 132,871 |
| Countries that End in O | 0 | - | 4.92 | 158,657 |
| Countries that End in R | 0 | - | 4.87 | 118,376 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 154,934 |
| Countries Ending in "IA" | 0 | - | 4.99 | 207,407 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 169,557 |
| Countries by Last Two Letters | 0 | - | 4.85 | 134,650 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,198 |
| Countries That End in Y | 0 | - | 4.90 | 185,285 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 196,619 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 151,897 |
| Countries that End in I | 0 | - | 4.94 | 134,542 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 182,470 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,300 |
| Countries That End in NIA | 0 | - | 4.92 | 109,118 |
| Countries That End in BIA | 0 | - | 4.92 | 147,851 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,258 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 118,635 |
| Countries That End in RIA | 0 | - | 4.93 | 126,198 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 110,183 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 225,716 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 132,684 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 125,035 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 90,583 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,026 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,284 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 102,796 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 124,682 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 48,896 |
| Countries with the Word "And" | 0 | - | 4.99 | 116,345 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 52,995 |
| Countries that End in L | 0 | - | 4.94 | 156,156 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 212,134 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,021 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,624 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,455 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,526 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 247,971 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 199,625 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 141,714 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 162,647 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 224,023 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 151,920 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 70,818 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.81 | 108,244 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,467 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,422 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,437,825 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 378,342 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,807,857 |
| One Border Countries | 0 | - | 4.98 | 465,632 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,596,597 |
| Countries with the Most HIV | 0 | - | 4.46 | 44,356 |
| Countries with the Most Malaria Deaths | 0 | - | 4.45 | 44,998 |
| Countries that Desalinate the Most Water | 0 | - | 4.77 | 41,424 |
| Every Country in its Official/Native Language | 0 | - | 4.98 | 24,781 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.95 | 86,150 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 266,553 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 121,149 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 111,624 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 92,950 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 58,515 |
| Majority Muslim Countries | 0 | - | 4.98 | 370,845 |
| Countries by National Anthem | 0 | - | 4.93 | 71,072 |
| NATO Countries | 0 | - | 4.98 | 277,219 |
| EU Countries Quiz | 0 | - | 4.99 | 270,902 |
| Recently Independent Countries | 0 | - | 4.98 | 158,200 |
| French-Speaking Countries | 0 | - | 4.85 | 269,275 |
