| Warsaw Pact Countries | 0 | - | 4.83 | 84,548 |
| Independence from Whom | 0 | - | 4.99 | 211,962 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 132,637 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,564 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,391 |
| Countries by Founding Story | 0 | - | 4.95 | 77,319 |
| Countries of the World in 1900 | 0 | - | 4.89 | 85,124 |
| Countries of the World in 1914 with a Map | 0 | - | 4.99 | 195,573 |
| Countries of the World in 1945 with a Map | 0 | - | 5.00 | 151,159 |
| Countries by Former Name | 0 | - | 4.99 | 125,261 |
| Historical City to Country | 0 | - | 4.84 | 78,603 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,541,403 |
| Landlocked Countries | 0 | - | 4.99 | 421,464 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,774,969 |
| Most Populous Countries by Year | 0 | - | 4.83 | 110,796 |
| First Countries to Reach 5 Million People | 0 | - | 4.92 | 135,426 |
| Most Populous Modern-Day Countries in 1000 AD | 0 | - | 4.88 | 76,272 |
| Most Populous Modern-Day Countries in 1 AD | 0 | - | 4.98 | 92,859 |
| Most Populous Modern-Day Countries in 1800 AD | 0 | - | 4.93 | 67,305 |
| Most Populous Modern-Day Countries in 1500 AD | 0 | - | 4.93 | 73,606 |
| Most Populous Modern-Day Countries by Century | 0 | - | 4.98 | 97,360 |
| Former Capitals | 0 | - | 4.88 | 71,499 |
| Sahara Desert Countries | 0 | - | 4.98 | 164,194 |
| Himalayan Countries | 0 | - | 4.95 | 138,481 |
| Andean Countries | 0 | - | 4.93 | 84,476 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 63,666 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 125,646 |
| Coffee Producing Countries | 0 | - | 4.83 | 67,297 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,699 |
| Danube Countries | 0 | - | 4.97 | 71,945 |
| Countries With an "Ish" Demonym | 0 | - | 4.98 | 116,939 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,363 |
| Countries with the Worst Passports | 0 | - | 4.93 | 84,190 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 149,652 |
| European Landlocked Countries | 0 | - | 4.99 | 147,070 |
| Partially Recognized Countries | 0 | - | 4.98 | 106,534 |
| Countries with the Most Species | 0 | - | 4.99 | 103,180 |
| Countries 197 to 205 | 0 | - | 4.89 | 70,678 |
| Countries Settled by Vikings | 0 | - | 4.93 | 121,712 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,554 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,696 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,503 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,181 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,602 |
| Countries in the Alps | 0 | - | 4.87 | 118,122 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 100,729 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 106,939 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,607 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,547 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,432 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 95,905 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,602 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,446 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,147 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,795 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,619 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,484 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,171 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,422 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,470 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 118,766 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,260 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 62,589 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,980 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 243,671 |
| World Countries - Blind Typing | 0 | - | 5.00 | 107,943 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,176 |
| Largest Countries By Category | 0 | - | 4.97 | 158,115 |
| Countries by Countries | 0 | - | 4.96 | 63,138 |
| Country Flags with the Most White | 0 | - | 4.85 | 138,614 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,260 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 69,478 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,549 |
| Countries of Europe in 1444 | 0 | - | 4.92 | 99,930 |
| Modern-Day Countries of the Inca Empire on a Map | 0 | - | 4.83 | 57,529 |
| All Countries by Population With a Map | 0 | - | 4.98 | 109,432 |
| Six Degrees of Separation - Countries #1 | 0 | - | 4.96 | 98,936 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 88,622 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 331,144 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 375,363 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 406,900 |
| Island Countries | 0 | - | 4.99 | 710,853 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,049,181 |
| Northernmost Countries | 0 | - | 4.99 | 361,733 |
| Countries of South America | 0 | - | 5.00 | 926,587 |
| Countries of Oceania | 0 | - | 5.00 | 1,055,941 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,875,612 |
| "Land" Countries | 0 | - | 4.98 | 337,166 |
| Most Populous Countries in 1900 | 0 | - | 4.91 | 173,865 |
| Countries by Independence Day | 0 | - | 4.61 | 52,768 |
| Former Countries by Capital | 0 | - | 4.45 | 127,550 |
| Former Countries | 0 | - | 4.75 | 133,872 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,382,381 |
| Flags of Countries of the World in 1910 | 0 | - | 4.96 | 78,984 |
| Battle to Country | 0 | - | 4.91 | 53,452 |
| Modern-Day Countries of the Umayyad Caliphate on a Map | 0 | - | 4.98 | 68,867 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 173,754 |
| Countries with Megacities | 0 | - | 4.99 | 264,231 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 199,613 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,399 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 137,877 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 81,460 |
| Countries by Official Language | 0 | - | 4.95 | 195,153 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 296,228 |
| Countries in their Native Language | 0 | - | 4.99 | 198,945 |
| Subdivisions by Country | 0 | - | 4.86 | 50,400 |
| Megadiverse Countries | 0 | - | 4.96 | 134,968 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 131,988 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,320 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 126,039 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,089 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 163,049 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,998 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,617 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,099 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 77,580 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,846 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,172 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,932 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,321 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,465 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 111,026 |
| World Map Quiz | 0 | - | 4.81 | 65,020 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 156,994 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,298 |
| Countries by Road Signs | 0 | - | 4.98 | 53,963 |
| Southernmost Countries of the World | 0 | - | 4.99 | 227,994 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 105,219 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,940 |
| Countries With the Most Languages | 0 | - | 4.90 | 202,073 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,831 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,963 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,258 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,411 |
| Tallest Countries North to South | 0 | - | 4.83 | 120,529 |
| Widest Countries East to West | 0 | - | 4.92 | 129,595 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,437 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 186,324 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,101 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,730 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,538 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,805 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,353 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,790 |
| Countries with Double Letters | 0 | - | 4.96 | 96,101 |
| Countries that End in N | 0 | - | 4.95 | 170,991 |
| Countries with Five Letters | 0 | - | 4.96 | 282,182 |
| Countries with Six Letters | 0 | - | 4.94 | 213,420 |
| Countries with W | 0 | - | 4.97 | 160,225 |
| Countries with Z | 0 | - | 4.98 | 291,292 |
| Countries with Letters Missing | 0 | - | 4.96 | 186,584 |
| Countries That End in U | 0 | - | 4.95 | 120,784 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 134,348 |
| Countries that End in O | 0 | - | 4.92 | 159,468 |
| Countries that End in R | 0 | - | 4.87 | 118,930 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,691 |
| Countries Ending in "IA" | 0 | - | 4.99 | 208,953 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 170,617 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,415 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 142,338 |
| Countries That End in Y | 0 | - | 4.91 | 185,840 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 197,821 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 152,779 |
| Countries that End in I | 0 | - | 4.94 | 135,050 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 183,995 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,776 |
| Countries That End in NIA | 0 | - | 4.92 | 109,727 |
| Countries That End in BIA | 0 | - | 4.93 | 149,135 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 167,040 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,369 |
| Countries That End in RIA | 0 | - | 4.93 | 126,770 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 110,956 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 227,436 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 133,617 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 126,016 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 91,583 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,542 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,963 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,427 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,468 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,386 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,215 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 53,911 |
| Countries that End in L | 0 | - | 4.94 | 156,777 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 215,445 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,246 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,986 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,907 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,952 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 249,650 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 200,580 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 142,930 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 163,475 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 225,355 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 152,819 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 71,068 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,687 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,839 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,447,316 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 380,772 |
