| Countries With No Rivers | 0 | - | 4.96 | 76,925 |
| Natural Features of Countries #1 | 0 | - | 4.87 | 83,905 |
| Countries with Fjords | 0 | - | 4.94 | 101,053 |
| Five Countries with the Longest Coastline by Continent | 0 | - | 4.97 | 115,662 |
| Countries Farthest From the Sea | 0 | - | 4.98 | 74,813 |
| African Great Lakes | 0 | - | 4.82 | 66,527 |
| Top 10 American Countries by Coastline | 0 | - | 4.96 | 88,471 |
| Countries Bordering the Four Color Seas | 0 | - | 4.92 | 23,147 |
| Capital Cities by Body of Water | 0 | - | 4.85 | 57,734 |
| Megadiverse Countries | 0 | - | 4.96 | 135,037 |
| Countries That Touch the Baltic Sea | 0 | - | 4.98 | 116,078 |
| North Sea Countries | 0 | - | 4.92 | 87,499 |
| Black Sea Countries | 0 | - | 4.87 | 60,654 |
| Countries That Touch the Red Sea | 0 | - | 4.90 | 65,456 |
| Caspian Sea Countries | 0 | - | 4.91 | 63,552 |
| Countries with the Shortest Coastlines | 0 | - | 4.89 | 67,284 |
| Name a Valid Country Bordering Each Sea | 0 | - | 4.91 | 115,985 |
| Countries with the Longest Coastline Bordering Each Other | 0 | - | 4.89 | 29,062 |
| Countries with the Longest Coastlines | 0 | - | 4.80 | 413,412 |
| Countries with Wild Tigers | 0 | - | 4.96 | 136,980 |
| Countries with Wild Penguins | 0 | - | 4.94 | 100,304 |
| Countries with the Most Venomous Animal Species | 0 | - | 4.87 | 87,314 |
| Cities on a Map of the Great Lakes | 0 | - | 4.41 | 44,609 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,602,283 |
| Landlocked Countries | 0 | - | 4.99 | 422,220 |
| Natural Features of Countries #2 | 0 | - | 4.55 | 37,543 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,780,425 |
| Countries with the Most Sheep | 0 | - | 4.92 | 103,393 |
| African Great Lake Countries with an Empty Map | 0 | - | 4.97 | 60,824 |
| Sahara Desert Countries | 0 | - | 4.98 | 164,607 |
| Himalayan Countries | 0 | - | 4.95 | 138,854 |
| Andean Countries | 0 | - | 4.93 | 84,682 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 63,885 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 125,924 |
| Coffee Producing Countries | 0 | - | 4.83 | 67,512 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,854 |
| Danube Countries | 0 | - | 4.97 | 72,043 |
| Countries With an "Ish" Demonym | 0 | - | 4.98 | 117,059 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,455 |
| Countries with the Worst Passports | 0 | - | 4.93 | 84,363 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 149,849 |
| European Landlocked Countries | 0 | - | 4.99 | 147,176 |
| Partially Recognized Countries | 0 | - | 4.98 | 106,688 |
| Countries with the Most Species | 0 | - | 4.99 | 103,267 |
| Countries 197 to 205 | 0 | - | 4.90 | 70,814 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,607 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,732 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,563 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,254 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,691 |
| Countries in the Alps | 0 | - | 4.87 | 118,246 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 101,265 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 107,079 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,679 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,624 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,547 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 95,967 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,701 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,516 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,199 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,877 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,668 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,541 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,245 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,499 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,552 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 118,968 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,334 |
| Countries that Host the Most Refugees | 0 | - | 4.96 | 64,095 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 46,128 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 244,064 |
| World Countries - Blind Typing | 0 | - | 5.00 | 108,193 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,254 |
| Largest Countries By Category | 0 | - | 4.97 | 158,256 |
| Countries by Countries | 0 | - | 4.96 | 63,260 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,299 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 88,696 |
| Countries that Catch the Most Fish | 0 | - | 4.90 | 112,668 |
| Countries with the Most Wolves | 0 | - | 4.92 | 108,268 |
| Countries With Two or More Bear Species | 0 | - | 4.90 | 22,796 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 331,762 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 375,580 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 407,491 |
| Island Countries | 0 | - | 4.99 | 711,136 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,384,306 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,050,179 |
| Northernmost Countries | 0 | - | 4.99 | 362,069 |
| Countries of South America | 0 | - | 5.00 | 927,689 |
| Countries of Oceania | 0 | - | 5.00 | 1,057,413 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,878,065 |
| "Land" Countries | 0 | - | 4.98 | 337,408 |
| Landforms by Country | 0 | - | 4.52 | 51,984 |
| Bodies of Water around the Arabian Peninsula | 0 | - | 4.74 | 36,120 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,448,579 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 381,054 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 173,964 |
| Countries with Megacities | 0 | - | 4.99 | 264,699 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 199,794 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,504 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 138,059 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 81,578 |
| Capitals by River | 0 | - | 4.55 | 48,345 |
| Countries by Official Language | 0 | - | 4.95 | 195,302 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 296,443 |
| Countries in their Native Language | 0 | - | 4.99 | 199,091 |
| Independence from Whom | 0 | - | 4.99 | 212,156 |
| Subdivisions by Country | 0 | - | 4.86 | 50,438 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 132,772 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 132,138 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,375 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 126,248 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,117 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 163,168 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,610 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,508 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 154,049 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,671 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,154 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 77,712 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,900 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,221 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,983 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,369 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,507 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 111,257 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,374 |
| Southernmost Countries of the World | 0 | - | 4.99 | 228,137 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 105,308 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 123,018 |
| Countries With the Most Languages | 0 | - | 4.90 | 202,274 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,918 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 94,031 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,322 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,456 |
| Tallest Countries North to South | 0 | - | 4.83 | 120,591 |
| Widest Countries East to West | 0 | - | 4.92 | 129,672 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,462 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 186,403 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,128 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,783 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,618 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,888 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,380 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,802 |
| Countries with Double Letters | 0 | - | 4.96 | 96,280 |
| Countries that End in N | 0 | - | 4.95 | 171,165 |
| Countries with Five Letters | 0 | - | 4.96 | 282,566 |
| Countries with Six Letters | 0 | - | 4.94 | 213,602 |
| Countries with W | 0 | - | 4.97 | 160,355 |
| Countries with Z | 0 | - | 4.98 | 291,509 |
| Countries with Letters Missing | 0 | - | 4.96 | 186,733 |
| Countries That End in U | 0 | - | 4.95 | 120,865 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 134,493 |
| Countries that End in O | 0 | - | 4.92 | 159,519 |
| Countries that End in R | 0 | - | 4.87 | 118,975 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,738 |
| Countries Ending in "IA" | 0 | - | 4.99 | 209,141 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 170,709 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,484 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 142,412 |
| Countries That End in Y | 0 | - | 4.91 | 185,884 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 197,954 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 152,873 |
| Countries that End in I | 0 | - | 4.94 | 135,107 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 184,135 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,827 |
| Countries That End in NIA | 0 | - | 4.92 | 109,796 |
| Countries That End in BIA | 0 | - | 4.93 | 149,225 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 167,136 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,440 |
| Countries That End in RIA | 0 | - | 4.93 | 126,815 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 111,034 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 227,667 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 133,728 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 126,150 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 91,702 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,584 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 53,039 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,449 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,533 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,429 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 53,999 |
| Countries that End in L | 0 | - | 4.94 | 156,851 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 215,858 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,271 |
| City to Country Quiz #1 | 0 | - | 4.97 | 156,034 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,963 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 79,011 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 249,779 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 200,679 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 143,035 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 163,626 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 225,475 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 152,880 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 71,108 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,712 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,882 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,835,660 |
| One Border Countries | 0 | - | 4.98 | 469,985 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,633,451 |
