| Countries of the World Quiz | 0 | - | 5.00 | 41,445,316 |
| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 95,316 |
| Landlocked Countries Quiz | 0 | - | 4.99 | 330,686 |
| Countries with the Most HIV | 0 | - | 4.50 | 42,948 |
| Countries with the Most Malaria Deaths | 0 | - | 4.45 | 31,975 |
| Most Populous Countries by Year | 0 | - | 4.81 | 94,931 |
| Countries with Glaciers | 0 | - | 4.97 | 96,787 |
| Countries with the Most Forest | 0 | - | 4.89 | 137,876 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,133,295 |
| Countries by Change in Carbon Dioxide Emissions | 0 | - | 4.92 | 48,395 |
| Countries with the Most Millionaires | 0 | - | 4.85 | 85,278 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,199,959 |
| Members of the Arab League | 0 | - | 4.85 | 64,872 |
| Sahara Desert Countries | 0 | - | 4.97 | 129,134 |
| Himalayan Countries | 0 | - | 4.95 | 107,101 |
| Andean Countries | 0 | - | 4.91 | 59,588 |
| Countries with the Oldest Median Age | 0 | - | 4.84 | 60,642 |
| Countries with the Youngest Median Age | 0 | - | 4.98 | 50,360 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 103,756 |
| Coffee Producing Countries | 0 | - | 4.82 | 54,600 |
| Countries with Shrinking Populations | 0 | - | 4.93 | 53,906 |
| Danube Countries | 0 | - | 4.96 | 57,032 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 92,046 |
| Countries With an "Ese" Demonym | 0 | - | 4.96 | 65,136 |
| Countries with the Best Passports | 0 | - | 4.87 | 72,166 |
| Countries with the Worst Passports | 0 | - | 4.88 | 50,024 |
| Countries with the Most Immigrants | 0 | - | 4.87 | 110,312 |
| European Landlocked Countries | 0 | - | 4.99 | 136,673 |
| Partially Recognized Countries | 0 | - | 4.98 | 90,425 |
| Countries with the Most Species | 0 | - | 4.99 | 89,733 |
| Countries 197 to 205 | 0 | - | 4.87 | 56,937 |
| Tropic of Cancer Countries | 0 | - | 4.96 | 44,904 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 44,202 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 48,761 |
| Countries that Use the Peso | 0 | - | 4.82 | 46,703 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.88 | 58,973 |
| Countries with a AAA Credit Rating | 0 | - | 4.87 | 49,604 |
| Countries in the Alps | 0 | - | 4.84 | 103,418 |
| Top Five Importing Partners by Country | 0 | - | 4.98 | 86,035 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 88,571 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 72,013 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 79,085 |
| Northernmost Countries by Continent | 0 | - | 4.97 | 94,563 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.91 | 88,053 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 90,205 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 46,544 |
| Biggest Country by Body of Water | 0 | - | 4.96 | 45,561 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 55,143 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.88 | 69,900 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 48,858 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 36,898 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 96,256 |
| Arctic Ocean Countries | 0 | - | 4.93 | 72,407 |
| Countries with the Most Grassland | 0 | - | 4.94 | 69,982 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 99,615 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 61,723 |
| Countries that Host the Most Refugees | 0 | - | 4.94 | 53,804 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 199,984 |
| World Countries - Blind Typing | 0 | - | 5.00 | 74,371 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 42,629 |
| Largest Countries By Category | 0 | - | 4.97 | 145,883 |
| Countries by Countries | 0 | - | 4.96 | 55,236 |
| Country Flags with the Most White | 0 | - | 4.90 | 125,554 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 59,028 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 79,065 |
| Spanish-Speaking Countries | 0 | - | 4.94 | 343,358 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 359,824 |
| Island Countries Quiz | 0 | - | 4.99 | 665,567 |
| Biggest Countries by Area | 0 | - | 5.00 | 941,698 |
| Northernmost Countries | 0 | - | 4.99 | 329,606 |
| Countries with the Longest Coastlines | 0 | - | 4.81 | 391,985 |
| Countries of South America | 0 | - | 5.00 | 803,654 |
| Countries of Oceania | 0 | - | 5.00 | 905,847 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,596,314 |
| Most Populous Countries in 1900 | 0 | - | 4.92 | 162,959 |
| Countries with the Most Billionaires | 0 | - | 4.94 | 283,708 |
| Countries that Catch the Most Fish | 0 | - | 4.88 | 102,067 |
| Countries with the Most Muslims | 0 | - | 4.93 | 132,939 |
| Countries with the Most Exports | 0 | - | 4.96 | 139,134 |
| Top Crude Oil Producing Countries | 0 | - | 4.89 | 163,970 |
| Countries by Oil Consumption | 0 | - | 4.96 | 112,187 |
| Largest Economies in 2050 | 0 | - | 4.89 | 100,874 |
| Richest Countries by Per-Capita GDP | 0 | - | 4.96 | 241,103 |
| Countries With Highest GDP as a Percent of Continent | 0 | - | 4.96 | 90,528 |
| Countries with the Highest GDP per Square Kilometer | 0 | - | 4.86 | 67,403 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 127,864 |
| Countries with Megacities | 0 | - | 4.99 | 200,167 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 173,721 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.97 | 99,151 |
| Countries With More than 200 Million People | 0 | - | 4.94 | 97,230 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 65,126 |
| Top 50 Countries by Population - In Order | 0 | - | 4.97 | 251,012 |
| Countries by Official Language | 0 | - | 4.96 | 174,385 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.92 | 251,591 |
| Countries in their Native Language | 0 | - | 4.98 | 179,543 |
| Independence from Whom | 0 | - | 4.99 | 187,846 |
| Subdivisions by Country | 0 | - | 4.82 | 46,731 |
| Who Controlled These Colonies? | 0 | - | 4.89 | 114,780 |
| Megadiverse Countries | 0 | - | 4.96 | 126,238 |
| Countries With the Most English Speakers | 0 | - | 4.87 | 92,688 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 107,223 |
| Most Desired Destinations for Potential Migrants | 0 | - | 4.82 | 47,667 |
| 15 Biggest Island Countries | 0 | - | 4.99 | 132,484 |
| Most Recently-Settled Countries | 0 | - | 4.92 | 49,585 |
| Countries of the World in 1938 Quiz | 0 | - | 4.96 | 78,971 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.95 | 145,750 |
| Countries with Multiple Populous Islands | 0 | - | 4.91 | 77,449 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 41,706 |
| Countries by Sports League Revenue | 0 | - | 4.89 | 44,586 |
| Landmarks of Countries #1 | 0 | - | 4.89 | 102,007 |
| Countries Furthest from the United States | 0 | - | 4.94 | 72,645 |
| Countries with the Highest HDI | 0 | - | 4.95 | 131,189 |
| Most Forested European Countries | 0 | - | 4.82 | 68,894 |
| Straight Shot to the Arctic Circle | 0 | - | 4.92 | 69,085 |
| Most Dispersed Island Nations | 0 | - | 4.96 | 65,715 |
| Countries of the World in Alphabetical Order | 0 | - | 4.99 | 84,747 |
| World Map Quiz | 0 | - | 4.91 | 50,638 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 116,558 |
| Smallest Countries with at Least One Border | 0 | - | 4.89 | 82,249 |
| Southernmost Countries of the World | 0 | - | 4.99 | 208,771 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 92,041 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.90 | 109,286 |
| Countries With the Most Languages | 0 | - | 4.91 | 176,069 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.93 | 88,157 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.86 | 72,549 |
| Countries with the Most Prisoners | 0 | - | 4.93 | 87,636 |
| Countries with the Most Domestic Camels | 0 | - | 4.93 | 54,679 |
| Tallest Countries North to South | 0 | - | 4.85 | 111,142 |
| Widest Countries East to West | 0 | - | 4.93 | 120,106 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 69,016 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 159,940 |
| Countries with the Longest Perimeter | 0 | - | 4.81 | 72,460 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 93,054 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 86,233 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 120,143 |
| Countries with the Most Desert | 0 | - | 4.92 | 105,839 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 66,664 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 32,276 |
| Countries with Double Letters | 0 | - | 4.96 | 70,378 |
| Countries that End in N | 0 | - | 4.94 | 134,584 |
| Countries with Five Letters Quiz | 0 | - | 4.96 | 231,943 |
| Countries with Six Letters Quiz | 0 | - | 4.94 | 189,243 |
| Countries with W | 0 | - | 4.96 | 124,502 |
| Countries with Z | 0 | - | 4.98 | 253,978 |
| Countries with Letters Missing | 0 | - | 4.97 | 168,644 |
| Countries That End in U | 0 | - | 4.95 | 108,547 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 91,168 |
| Countries that End in O | 0 | - | 4.92 | 148,046 |
| Countries that End in R | 0 | - | 4.84 | 96,954 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 147,742 |
| Countries Ending in "IA" | 0 | - | 4.99 | 172,952 |
| Countries by First and Last Letter #1 | 0 | - | 4.98 | 157,064 |
| Countries by Last Two Letters | 0 | - | 4.90 | 117,238 |
| Countries by First and Last Letter #2 | 0 | - | 4.94 | 130,173 |
| Countries That End in Y | 0 | - | 4.90 | 162,073 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 162,229 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.91 | 121,862 |
| Countries that End in I | 0 | - | 4.92 | 114,929 |
| Countries Based on First Two Letters #2 | 0 | - | 4.98 | 150,768 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 89,037 |
| Countries That End in NIA | 0 | - | 4.93 | 101,453 |
| Countries That End in BIA | 0 | - | 4.91 | 126,868 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 154,488 |
| Countries Whose Names Start with Saint | 0 | - | 4.88 | 110,496 |
| Countries That End in RIA | 0 | - | 4.90 | 101,552 |
| Most Common Words in Official Country Names | 0 | - | 4.85 | 101,220 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 203,242 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 120,893 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 111,969 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 4.99 | 78,557 |
| Countries with a Unique Last Letter | 0 | - | 4.91 | 93,360 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 97,597 |
| Countries that are Free from U.S.A. | 0 | - | 4.90 | 43,362 |
| Countries with the Word "And" | 0 | - | 4.98 | 84,434 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 41,792 |
| Countries that End in L | 0 | - | 4.95 | 135,358 |
| "Land" Countries | 0 | - | 4.98 | 291,464 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 190,604 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.96 | 65,323 |
| City to Country Quiz #1 | 0 | - | 4.94 | 134,931 |
| City to Country Quiz #3 | 0 | - | 4.87 | 100,731 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 72,236 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 210,031 |
| Five Poorest Countries by Continent | 0 | - | 4.95 | 169,172 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 117,303 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 134,181 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.93 | 195,425 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 141,767 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 66,339 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.84 | 102,904 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 82,927 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.93 | 57,034 |
| Biggest Countries by Population | 0 | - | 4.99 | 1,321,959 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 351,999 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,097,161 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,440,654 |
| One Border Countries | 0 | - | 4.98 | 413,167 |
| Countries With One Word and Three A's | 0 | - | 4.87 | 31,482 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.94 | 66,926 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 247,066 |
