| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,173,379 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 86,562 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 118,555 |
| Countries within the Arctic Circle - Map Quiz | 0 | - | 4.86 | 53,479 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,117,800 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,470,402 |
| Landlocked Countries Quiz | 0 | - | 4.99 | 334,506 |
| Countries of the World Quiz | 0 | - | 5.00 | 41,774,935 |
| Countries of the World in 1900 | 0 | - | 4.88 | 68,514 |
| Countries of the World in 1914 with a Map | 0 | - | 4.99 | 173,673 |
| All Countries by Northernmost Point on Land | 0 | - | 4.91 | 109,066 |
| 20 Countries on an Empty Map #1 | 0 | - | 4.95 | 55,356 |
| Countries of the World in 1945 with a Map | 0 | - | 5.00 | 130,811 |
| Members of the Arab League | 0 | - | 4.86 | 66,362 |
| Sahara Desert Countries | 0 | - | 4.97 | 130,541 |
| Himalayan Countries | 0 | - | 4.94 | 108,486 |
| Andean Countries | 0 | - | 4.91 | 60,245 |
| Countries with the Oldest Median Age | 0 | - | 4.82 | 61,418 |
| Countries with the Youngest Median Age | 0 | - | 4.98 | 50,875 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 104,497 |
| Coffee Producing Countries | 0 | - | 4.82 | 54,865 |
| Countries with Shrinking Populations | 0 | - | 4.93 | 54,284 |
| Danube Countries | 0 | - | 4.96 | 57,242 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 92,254 |
| Countries With an "Ese" Demonym | 0 | - | 4.96 | 65,311 |
| Countries with the Best Passports | 0 | - | 4.86 | 72,744 |
| Countries with the Worst Passports | 0 | - | 4.88 | 50,431 |
| Countries with the Most Immigrants | 0 | - | 4.87 | 111,070 |
| European Landlocked Countries | 0 | - | 4.99 | 137,185 |
| Partially Recognized Countries | 0 | - | 4.98 | 90,836 |
| Countries with the Most Species | 0 | - | 4.99 | 89,865 |
| Countries 197 to 205 | 0 | - | 4.87 | 57,371 |
| Tropic of Cancer Countries | 0 | - | 4.96 | 45,033 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 44,325 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 49,081 |
| Countries that Use the Peso | 0 | - | 4.82 | 46,895 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.88 | 59,142 |
| Countries with a AAA Credit Rating | 0 | - | 4.87 | 49,948 |
| Countries in the Alps | 0 | - | 4.84 | 103,898 |
| Top Five Importing Partners by Country | 0 | - | 4.98 | 86,464 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 89,583 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 72,304 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 79,398 |
| Northernmost Countries by Continent | 0 | - | 4.97 | 94,922 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.91 | 88,368 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 90,575 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 46,788 |
| Biggest Country by Body of Water | 0 | - | 4.96 | 45,711 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 55,439 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.88 | 70,198 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 49,041 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 37,036 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 96,601 |
| Arctic Ocean Countries | 0 | - | 4.93 | 72,691 |
| Countries with the Most Grassland | 0 | - | 4.94 | 70,265 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 100,623 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 61,977 |
| Countries that Host the Most Refugees | 0 | - | 4.94 | 54,065 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 202,717 |
| World Countries - Blind Typing | 0 | - | 5.00 | 75,478 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 42,853 |
| Largest Countries By Category | 0 | - | 4.97 | 146,475 |
| Countries by Countries | 0 | - | 4.95 | 55,637 |
| Country Flags with the Most White | 0 | - | 4.90 | 126,589 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 59,217 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 45,144 |
| All Countries by Population With a Map | 0 | - | 4.99 | 65,086 |
| Six Degrees of Separation - Countries #1 | 0 | - | 4.96 | 78,034 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 79,652 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,229,911 |
| Pixelated World Map | 0 | - | 5.00 | 130,618 |
| Countries of Europe in 1444 | 0 | - | 4.93 | 88,698 |
| Countries of the World in 1444 | 0 | - | 4.98 | 51,003 |
| Modern-Day Countries of the Inca Empire on a Map | 0 | - | 4.81 | 50,529 |
| Countries of the World with a Borderless Map | 0 | - | 4.99 | 71,583 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 345,169 |
| Countries with the Most Tourists Quiz | 0 | - | 4.91 | 362,759 |
| Island Countries Quiz | 0 | - | 4.99 | 668,790 |
| Biggest Countries by Area | 0 | - | 5.00 | 947,732 |
| Northernmost Countries | 0 | - | 4.99 | 330,968 |
| Countries of South America | 0 | - | 5.00 | 810,192 |
| Countries of Oceania | 0 | - | 5.00 | 914,014 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,611,917 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 129,077 |
| Countries with Megacities | 0 | - | 4.99 | 201,892 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 175,414 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.97 | 99,980 |
| Countries With More than 200 Million People | 0 | - | 4.94 | 98,278 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.97 | 65,903 |
| Top 50 Countries by Population - In Order | 0 | - | 4.97 | 253,106 |
| Global Cities on a World Map | 0 | - | 4.92 | 92,925 |
| Countries by Official Language | 0 | - | 4.96 | 175,272 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.92 | 253,300 |
| Countries in their Native Language | 0 | - | 4.98 | 180,618 |
| Independence from Whom | 0 | - | 4.99 | 189,408 |
| Subdivisions by Country | 0 | - | 4.84 | 46,898 |
| Who Controlled These Colonies? | 0 | - | 4.89 | 115,661 |
| Megadiverse Countries | 0 | - | 4.96 | 126,814 |
| Countries With the Most English Speakers | 0 | - | 4.87 | 93,945 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 107,597 |
| Most Desired Destinations for Potential Migrants | 0 | - | 4.82 | 47,831 |
| 15 Biggest Island Countries | 0 | - | 4.99 | 133,364 |
| Most Recently-Settled Countries | 0 | - | 4.92 | 49,900 |
| Countries of the World in 1938 Quiz | 0 | - | 4.96 | 79,661 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.95 | 146,048 |
| Countries with Multiple Populous Islands | 0 | - | 4.91 | 77,728 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 41,859 |
| Countries by Sports League Revenue | 0 | - | 4.89 | 45,088 |
| Landmarks of Countries #1 | 0 | - | 4.89 | 102,274 |
| Countries Furthest from the United States | 0 | - | 4.94 | 72,954 |
| Countries with the Highest HDI | 0 | - | 4.95 | 131,492 |
| Straight Shot to the Arctic Circle | 0 | - | 4.92 | 69,408 |
| Most Dispersed Island Nations | 0 | - | 4.96 | 66,037 |
| Mediterranean Countries with an Empty Map | 0 | - | 4.99 | 86,400 |
| World Map Quiz | 0 | - | 4.90 | 51,474 |
| Smallest Countries with at Least One Border | 0 | - | 4.90 | 82,744 |
| Countries by Founding Story | 0 | - | 4.93 | 55,918 |
| Countries by Road Signs | 0 | - | 4.98 | 46,301 |
| Southernmost Countries of the World | 0 | - | 4.99 | 209,789 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 92,841 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 109,986 |
| Countries With the Most Languages | 0 | - | 4.90 | 177,785 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.93 | 88,701 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.86 | 73,085 |
| Countries with the Most Prisoners | 0 | - | 4.93 | 88,300 |
| Countries with the Most Domestic Camels | 0 | - | 4.93 | 55,098 |
| Tallest Countries North to South | 0 | - | 4.85 | 111,582 |
| Widest Countries East to West | 0 | - | 4.93 | 120,559 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 69,122 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 160,550 |
| Countries with the Longest Perimeter | 0 | - | 4.81 | 72,837 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 93,418 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 86,861 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 120,665 |
| Countries with the Most Desert | 0 | - | 4.92 | 106,488 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 66,801 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 32,416 |
| Countries with Double Letters | 0 | - | 4.96 | 71,817 |
| Countries that End in N | 0 | - | 4.94 | 136,004 |
| Countries with Five Letters Quiz | 0 | - | 4.96 | 233,884 |
| Countries with Six Letters Quiz | 0 | - | 4.95 | 190,572 |
| Countries with W | 0 | - | 4.96 | 125,669 |
| Countries with Z | 0 | - | 4.98 | 264,688 |
| Countries with Letters Missing | 0 | - | 4.97 | 169,694 |
| Countries That End in U | 0 | - | 4.95 | 109,342 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 92,385 |
| Countries that End in O | 0 | - | 4.92 | 148,653 |
| Countries that End in R | 0 | - | 4.85 | 97,319 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 148,093 |
| Countries Ending in "IA" | 0 | - | 4.99 | 174,188 |
| Countries by First and Last Letter #1 | 0 | - | 4.98 | 157,707 |
| Countries by Last Two Letters | 0 | - | 4.90 | 117,702 |
| Countries by First and Last Letter #2 | 0 | - | 4.95 | 130,644 |
| Countries That End in Y | 0 | - | 4.90 | 162,416 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 163,000 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.91 | 122,388 |
| Countries that End in I | 0 | - | 4.92 | 115,201 |
| Countries Based on First Two Letters #2 | 0 | - | 4.98 | 151,639 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 89,389 |
| Countries That End in NIA | 0 | - | 4.92 | 101,821 |
| Countries That End in BIA | 0 | - | 4.91 | 127,308 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 155,166 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 110,979 |
| Countries That End in RIA | 0 | - | 4.90 | 101,893 |
| Most Common Words in Official Country Names | 0 | - | 4.85 | 101,768 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 204,610 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 121,630 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 112,767 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 4.99 | 79,301 |
| Countries With One Word and Three A's | 0 | - | 4.87 | 31,905 |
| Countries with a Unique Last Letter | 0 | - | 4.91 | 93,846 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 98,172 |
| Countries that are Free from U.S.A. | 0 | - | 4.90 | 43,694 |
| Countries with the Word "And" | 0 | - | 4.98 | 85,074 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 42,505 |
| Countries that End in L | 0 | - | 4.95 | 135,848 |
| "Land" Countries | 0 | - | 4.98 | 292,350 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 191,287 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 82,888 |
| City to Country Quiz #1 | 0 | - | 4.95 | 135,368 |
| City to Country Quiz #3 | 0 | - | 4.87 | 101,081 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 72,623 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 211,114 |
| Five Poorest Countries by Continent | 0 | - | 4.94 | 171,018 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 117,827 |
| Five Smallest Countries by Continent | 0 | - | 4.97 | 134,932 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.93 | 196,432 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 142,582 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 66,629 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.84 | 103,309 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 83,283 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.93 | 57,384 |
| All First-Level Subdivisions of Europe by Proximity | 0 | - | 4.83 | 67,680 |
| Top World Languages on a Map | 0 | - | 4.91 | 94,160 |
| Official Languages of the World on the Disappearing World Map | 0 | - | 4.99 | 100,644 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 40,584 |
| Biggest Countries by Population | 0 | - | 4.99 | 1,329,050 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 353,412 |
| One Border Countries | 0 | - | 4.98 | 415,811 |
| Countries of Europe in 1000 with a Map | 0 | - | 4.80 | 37,099 |
