| Countries in World War I | 0 | - | 4.88 | 227,505 |
| Battle to Country | 0 | - | 4.91 | 52,968 |
| Important Cities in WWII | 0 | - | 4.42 | 93,227 |
| Independence from Whom | 0 | - | 4.99 | 210,906 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,412 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,256 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,663 |
| Countries by Founding Story | 0 | - | 4.95 | 76,915 |
| Communist Countries in History | 0 | - | 4.63 | 494,081 |
| Recently Independent Countries | 0 | - | 4.98 | 158,433 |
| Countries of the World in 1900 | 0 | - | 4.89 | 84,225 |
| Countries of the World in 1914 with a Map | 0 | - | 4.99 | 194,241 |
| Countries of the World in 1945 with a Map | 0 | - | 5.00 | 149,935 |
| Countries by Former Name | 0 | - | 4.99 | 124,721 |
| Historical City to Country | 0 | - | 4.84 | 78,350 |
| Cities Bombed During WWII | 0 | - | 4.08 | 30,055 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,193,667 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 236,932 |
| The Dictator Files: Adolf Hitler | 0 | - | 4.79 | 77,641 |
| WWII First Names | 0 | - | 4.44 | 41,689 |
| Most Populous Countries by Year | 0 | - | 4.83 | 110,002 |
| First Countries to Reach 5 Million People | 0 | - | 4.92 | 134,852 |
| Most Populous Modern-Day Countries in 1000 AD | 0 | - | 4.88 | 75,805 |
| Most Populous Modern-Day Countries in 1 AD | 0 | - | 4.97 | 89,635 |
| Most Populous Modern-Day Countries in 1800 AD | 0 | - | 4.93 | 66,959 |
| Most Populous Modern-Day Countries in 1500 AD | 0 | - | 4.93 | 73,221 |
| Most Populous Modern-Day Countries by Century | 0 | - | 4.98 | 96,794 |
| Countries Settled by Vikings | 0 | - | 4.93 | 121,130 |
| Countries with the Most Christians | 0 | - | 4.92 | 142,384 |
| Warsaw Pact Countries | 0 | - | 4.83 | 84,383 |
| Least Christian Countries with Exceptions | 0 | - | 4.90 | 87,573 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 68,434 |
| Countries of Europe in 1444 | 0 | - | 4.92 | 99,228 |
| Most Populous Countries in 1900 | 0 | - | 4.91 | 173,359 |
| Landlocked Countries | 0 | - | 4.99 | 417,039 |
| Countries with the Most Catholics | 0 | - | 4.90 | 108,718 |
| Orthodox Countries | 0 | - | 4.92 | 131,005 |
| Countries that Have Won the Most Battles | 0 | - | 4.02 | 39,465 |
| Flags of Countries of the World in 1910 | 0 | - | 4.96 | 78,457 |
| Monarchies of Europe | 0 | - | 4.90 | 97,737 |
| Monarchies of Asia | 0 | - | 4.97 | 70,859 |
| Asian Country Superlatives | 0 | - | 4.83 | 80,660 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,743,468 |
| Five Countries with Most Christians by Continent | 0 | - | 4.99 | 111,165 |
| World Leaders of the World Wars | 0 | - | 4.35 | 37,757 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 115,488 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 198,174 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 119,817 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.85 | 119,898 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.93 | 91,501 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,680 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 126,554 |
| Top 10 Coldest Asian Countries | 0 | - | 4.95 | 122,706 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 327,293 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 373,982 |
| Countries by Independence Day | 0 | - | 4.61 | 52,681 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 404,057 |
| Island Countries | 0 | - | 4.99 | 708,980 |
| Sahara Desert Countries | 0 | - | 4.98 | 162,105 |
| Himalayan Countries | 0 | - | 4.95 | 136,667 |
| Andean Countries | 0 | - | 4.95 | 83,567 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 62,822 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 124,106 |
| Coffee Producing Countries | 0 | - | 4.83 | 66,492 |
| Former Countries by Capital | 0 | - | 4.45 | 127,269 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,085 |
| Danube Countries | 0 | - | 4.97 | 71,468 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 116,279 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 85,881 |
| Countries with the Worst Passports | 0 | - | 4.94 | 83,239 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 148,237 |
| European Landlocked Countries | 0 | - | 4.99 | 146,166 |
| Partially Recognized Countries | 0 | - | 4.98 | 105,828 |
| Countries with the Most Species | 0 | - | 4.99 | 102,232 |
| Countries 197 to 205 | 0 | - | 4.89 | 69,958 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,348 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,528 |
| Countries that Use the Peso | 0 | - | 4.88 | 59,191 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 72,839 |
| Countries with a AAA Credit Rating | 0 | - | 4.85 | 57,218 |
| Countries in the Alps | 0 | - | 4.86 | 117,393 |
| Former Countries | 0 | - | 4.75 | 133,011 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 94,937 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 105,996 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,282 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 95,779 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 115,870 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.91 | 95,293 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,034 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,019 |
| Largest Country by Body of Water | 0 | - | 4.96 | 57,845 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,383 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,384 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,221 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,762 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,030 |
| Countries with the Most Grassland | 0 | - | 4.93 | 77,035 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 117,792 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 67,919 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,452 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,283 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 241,230 |
| World Countries - Blind Typing | 0 | - | 5.00 | 106,679 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 47,853 |
| Largest Countries By Category | 0 | - | 4.97 | 157,325 |
| Countries by Countries | 0 | - | 4.96 | 62,637 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,371,428 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,464 |
| Country Flags with the Most White | 0 | - | 4.87 | 137,925 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,094 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 89,549 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,415 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 88,128 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,043,798 |
| Northernmost Countries | 0 | - | 4.99 | 359,575 |
| Political Movements by Country | 0 | - | 4.46 | 72,403 |
| Countries of South America | 0 | - | 5.00 | 920,215 |
| Countries of Oceania | 0 | - | 5.00 | 1,047,711 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,860,038 |
| "Land" Countries | 0 | - | 4.98 | 334,844 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.93 | 82,220 |
| Top 10 Richest Countries in Africa | 0 | - | 4.85 | 75,559 |
| Top 10 Richest Countries in Europe | 0 | - | 4.90 | 148,847 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 81,014 |
| Biggest Trading Partners - European Union | 0 | - | 4.91 | 72,444 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,906 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,440,520 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 379,005 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 172,428 |
| Countries with Megacities | 0 | - | 4.99 | 249,263 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 198,286 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 112,632 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 136,601 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 80,607 |
| Countries by Official Language | 0 | - | 4.95 | 194,116 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 294,920 |
| Countries in their Native Language | 0 | - | 4.99 | 197,729 |
| Subdivisions by Country | 0 | - | 4.86 | 50,215 |
| Megadiverse Countries | 0 | - | 4.96 | 134,576 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 130,925 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,090 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,651 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 74,958 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 162,486 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,580 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,393 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 44,815 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 76,383 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,600 |
| Hindu Countries | 0 | - | 4.86 | 49,866 |
| Countries Furthest from the United States | 0 | - | 4.94 | 88,701 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,666 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 74,880 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,228 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 109,680 |
| World Map Quiz | 0 | - | 4.81 | 64,173 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 154,604 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 106,742 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 103,249 |
| Countries by Road Signs | 0 | - | 4.98 | 53,462 |
| Southernmost Countries of the World | 0 | - | 4.99 | 227,124 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 104,711 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,440 |
| Countries With the Most Languages | 0 | - | 4.90 | 200,801 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,313 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,497 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,663 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,167 |
| Tallest Countries North to South | 0 | - | 4.83 | 119,774 |
| Widest Countries East to West | 0 | - | 4.92 | 129,182 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,336 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 185,709 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 97,936 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 93,979 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,016 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,392 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,133 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.84 | 34,685 |
| Five Most Guessed Country Flags by Continent | 0 | - | 4.98 | 53,314 |
| Countries with Double Letters | 0 | - | 4.96 | 94,316 |
| Countries that End in N | 0 | - | 4.95 | 167,901 |
| Countries with Five Letters Quiz | 0 | - | 4.96 | 263,697 |
| Countries with Six Letters | 0 | - | 4.93 | 211,383 |
| Countries with W | 0 | - | 4.97 | 158,957 |
| Countries with Z | 0 | - | 4.98 | 288,973 |
| Countries with Letters Missing | 0 | - | 4.97 | 185,172 |
| Countries That End in U | 0 | - | 4.95 | 120,038 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 133,261 |
| Countries that End in O | 0 | - | 4.92 | 158,935 |
| Countries that End in R | 0 | - | 4.87 | 118,549 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,325 |
| Countries Ending in "IA" | 0 | - | 4.99 | 207,853 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 169,802 |
| Countries by Last Two Letters | 0 | - | 4.85 | 134,854 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,436 |
| Countries That End in Y | 0 | - | 4.90 | 185,468 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 196,909 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 152,142 |
| Countries that End in I | 0 | - | 4.94 | 134,705 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 182,750 |
