| Countries With No Rivers | 0 | - | 4.96 | 68,809 |
| Natural Features of Countries #1 | 0 | - | 4.85 | 77,207 |
| Countries with Fjords | 0 | - | 4.92 | 77,763 |
| Countries That Touch the Baltic Sea | 0 | - | 4.99 | 111,158 |
| North Sea Countries | 0 | - | 4.92 | 79,885 |
| Black Sea Countries | 0 | - | 4.88 | 57,099 |
| Countries That Touch the Red Sea | 0 | - | 4.90 | 60,936 |
| Caspian Sea Countries | 0 | - | 4.91 | 58,517 |
| Countries with the Shortest Coastlines | 0 | - | 4.82 | 54,347 |
| 10 Longest Rivers in the United States | 0 | - | 4.82 | 34,707 |
| Mekong River Countries Empty Map Quiz | 0 | - | 4.86 | 48,357 |
| Megadiverse Countries | 0 | - | 4.96 | 124,807 |
| Five Countries with the Longest Coastline by Continent | 0 | - | 4.98 | 104,588 |
| Countries Farthest From the Sea | 0 | - | 4.98 | 67,632 |
| Countries with Wild Tigers | 0 | - | 4.95 | 110,355 |
| Countries with Wild Penguins | 0 | - | 4.93 | 89,726 |
| Countries with the Most Venomous Animal Species | 0 | - | 4.89 | 78,163 |
| Top 10 American Countries by Coastline | 0 | - | 4.95 | 82,921 |
| Countries of the World Quiz | 0 | - | 5.00 | 40,500,116 |
| African Great Lake Countries with an Empty Map | 0 | - | 4.97 | 56,375 |
| Natural Features of Countries #2 | 0 | - | 4.55 | 34,666 |
| Countries with the Most Sheep | 0 | - | 4.89 | 82,209 |
| Landlocked Countries Quiz | 0 | - | 4.99 | 317,927 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,022,863 |
| Countries that Start with A | 0 | - | 4.98 | 1,928,374 |
| Countries that Start with B | 0 | - | 4.96 | 2,066,837 |
| Countries that Start with C | 0 | - | 4.96 | 1,633,922 |
| Countries that Start with D | 0 | - | 4.96 | 585,021 |
| Countries that Start with E | 0 | - | 4.95 | 1,221,882 |
| Countries that Start with G | 0 | - | 4.97 | 1,341,272 |
| Countries that Start with H | 0 | - | 4.95 | 498,824 |
| Countries that Start with I | 0 | - | 4.92 | 1,152,787 |
| Countries that Start with J | 0 | - | 4.98 | 502,357 |
| Countries that Start with K | 0 | - | 4.97 | 705,147 |
| Countries that Start with L | 0 | - | 4.98 | 963,388 |
| Countries that Start with N | 0 | - | 4.92 | 989,853 |
| Countries that Start with P | 0 | - | 4.94 | 1,092,703 |
| Countries that Start with S | 0 | - | 4.98 | 1,593,995 |
| Countries that Start with T | 0 | - | 4.88 | 902,640 |
| Countries that Start with U | 0 | - | 4.96 | 815,214 |
| Countries that Start with V | 0 | - | 4.98 | 546,026 |
| Countries that Start with F | 0 | - | 4.83 | 531,703 |
| Countries that Start with M | 0 | - | 4.97 | 1,245,385 |
| Rivers of the United States | 0 | - | 4.93 | 49,112 |
| Capital Cities by Body of Water | 0 | - | 4.87 | 53,040 |
| Countries by Initial Letter and Continent #2 | 0 | - | 4.87 | 86,434 |
| Countries that Catch the Most Fish | 0 | - | 4.88 | 100,481 |
| Countries with the Longest Coastlines | 0 | - | 4.80 | 388,316 |
| "Stan" Countries - Map Quiz | 0 | - | 4.98 | 110,053 |
| Countries with the Most Wolves | 0 | - | 4.88 | 78,174 |
| Biggest City by River | 0 | - | 4.42 | 50,748 |
| Spanish-Speaking Countries | 0 | - | 4.94 | 338,760 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 352,050 |
| Countries on the Equator | 0 | - | 4.82 | 132,786 |
| Members of the Arab League | 0 | - | 4.82 | 59,418 |
| Island Countries Quiz | 0 | - | 4.99 | 639,059 |
| Sahara Desert Countries | 0 | - | 4.97 | 125,249 |
| Himalayan Countries | 0 | - | 4.95 | 102,590 |
| Andean Countries | 0 | - | 4.90 | 57,004 |
| Countries with the Oldest Median Age | 0 | - | 4.85 | 57,847 |
| Countries with the Youngest Median Age | 0 | - | 4.98 | 48,610 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 101,936 |
| Coffee Producing Countries | 0 | - | 4.82 | 53,574 |
| Countries with Shrinking Populations | 0 | - | 4.93 | 52,776 |
| Danube Countries | 0 | - | 4.97 | 56,372 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 91,423 |
| Countries With an "Ese" Demonym | 0 | - | 4.96 | 64,615 |
| Countries with the Best Passports | 0 | - | 4.87 | 70,402 |
| Countries with the Worst Passports | 0 | - | 4.87 | 48,817 |
| Countries with the Most Immigrants | 0 | - | 4.87 | 108,436 |
| European Landlocked Countries | 0 | - | 4.99 | 114,860 |
| Partially Recognized Countries | 0 | - | 4.98 | 88,803 |
| Countries with the Most Species | 0 | - | 4.99 | 89,097 |
| Countries 197 to 205 | 0 | - | 4.88 | 55,869 |
| Tropic of Cancer Countries | 0 | - | 4.96 | 44,455 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 43,828 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 47,790 |
| Countries that Use the Peso | 0 | - | 4.81 | 46,143 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.87 | 58,472 |
| Countries with a AAA Credit Rating | 0 | - | 4.89 | 48,717 |
| Countries in the Alps | 0 | - | 4.82 | 101,887 |
| Top Five Importing Partners by Country | 0 | - | 4.98 | 84,701 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 85,878 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 71,155 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 77,772 |
| Northernmost Countries by Continent | 0 | - | 4.97 | 93,409 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.91 | 87,102 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 89,086 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 45,785 |
| Biggest Country by Body of Water | 0 | - | 4.96 | 45,082 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 54,200 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.88 | 68,941 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 48,345 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 36,429 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 95,016 |
| Arctic Ocean Countries | 0 | - | 4.93 | 71,531 |
| Countries with the Most Grassland | 0 | - | 4.93 | 69,015 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 96,711 |
| Countries with the Most Climate Zones | 0 | - | 4.97 | 60,976 |
| Countries that Host the Most Refugees | 0 | - | 4.93 | 52,987 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 193,019 |
| World Countries - Blind Typing | 0 | - | 5.00 | 71,504 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 41,985 |
| Largest Countries By Category | 0 | - | 4.96 | 143,966 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 77,419 |
| Biggest Countries by Area | 0 | - | 5.00 | 925,449 |
| Northernmost Countries | 0 | - | 4.99 | 325,454 |
| Landforms by Country Quiz | 0 | - | 4.54 | 51,228 |
| Countries of South America | 0 | - | 5.00 | 784,379 |
| Countries of Oceania | 0 | - | 5.00 | 882,964 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,112,539 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,553,450 |
| African Great Lakes | 0 | - | 4.84 | 52,192 |
| Biggest Countries by Population | 0 | - | 4.99 | 1,302,925 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 347,691 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 124,289 |
| Countries with Megacities | 0 | - | 4.99 | 194,962 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 169,615 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.97 | 96,945 |
| Countries With More than 200 Million People | 0 | - | 4.93 | 93,809 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.97 | 62,791 |
| Top 50 Countries by Population - In Order | 0 | - | 4.97 | 245,290 |
| Countries by Official Language | 0 | - | 4.95 | 153,591 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 246,966 |
| Countries in their Native Language | 0 | - | 4.98 | 177,087 |
| Independence from Whom | 0 | - | 4.99 | 183,812 |
| Subdivisions by Country | 0 | - | 4.82 | 46,202 |
| Who Controlled These Colonies? | 0 | - | 4.89 | 112,282 |
| Countries With the Most English Speakers | 0 | - | 4.87 | 90,067 |
| Countries with Multiple Big Islands | 0 | - | 4.92 | 106,055 |
| Most Desired Destinations for Potential Migrants | 0 | - | 4.82 | 47,144 |
| 15 Biggest Island Countries | 0 | - | 4.99 | 130,156 |
| Most Recently-Settled Countries | 0 | - | 4.92 | 48,762 |
| Countries of the World in 1938 Quiz | 0 | - | 4.96 | 76,910 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.95 | 144,354 |
| Countries with the Most Wild Elephants | 0 | - | 4.58 | 50,522 |
| Countries with Multiple Populous Islands | 0 | - | 4.91 | 76,535 |
| Animal Populations of Countries | 0 | - | 4.50 | 39,883 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 40,996 |
| Countries by Sports League Revenue | 0 | - | 4.87 | 43,037 |
| Landmarks of Countries #1 | 0 | - | 4.89 | 100,853 |
| Countries with the Highest HDI | 0 | - | 4.95 | 130,501 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,037,585 |
| Smallest Countries with at Least One Border | 0 | - | 4.91 | 80,816 |
| Southernmost Countries of the World | 0 | - | 4.99 | 205,441 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 90,176 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.90 | 107,134 |
| Countries With the Most Languages | 0 | - | 4.90 | 171,740 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.92 | 86,605 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.85 | 70,928 |
| Countries with the Most Prisoners | 0 | - | 4.93 | 85,532 |
| Countries with the Most Domestic Camels | 0 | - | 4.92 | 53,352 |
| Tallest Countries North to South | 0 | - | 4.84 | 109,889 |
| Widest Countries East to West | 0 | - | 4.93 | 118,772 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 68,691 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 157,968 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 92,124 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.96 | 84,845 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 118,072 |
| Countries with the Most Desert | 0 | - | 4.92 | 104,572 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 66,275 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 31,872 |
| Countries with Double Letters | 0 | - | 4.96 | 67,077 |
| Countries that End in N | 0 | - | 4.94 | 131,520 |
| Countries with Five Letters Quiz | 0 | - | 4.96 | 227,989 |
| Countries with Six Letters Quiz | 0 | - | 4.95 | 185,777 |
| Countries with W | 0 | - | 4.97 | 121,789 |
| Countries with Z | 0 | - | 4.98 | 242,639 |
| Countries with Letters Missing | 0 | - | 4.97 | 154,706 |
| Countries That End in U | 0 | - | 4.94 | 107,023 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 88,426 |
| Countries that End in O | 0 | - | 4.92 | 146,451 |
| Countries that End in R | 0 | - | 4.86 | 96,150 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 146,907 |
| Countries Ending in "IA" | 0 | - | 4.99 | 169,690 |
| Countries by First and Last Letter #1 | 0 | - | 4.98 | 154,947 |
| Countries by Last Two Letters | 0 | - | 4.90 | 115,640 |
| Countries by First and Last Letter #2 | 0 | - | 4.95 | 128,571 |
| Countries That End in Y | 0 | - | 4.90 | 160,840 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 159,742 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.91 | 119,910 |
| Countries that End in I | 0 | - | 4.92 | 114,191 |
| Countries Based on First Two Letters #2 | 0 | - | 4.98 | 148,527 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 87,855 |
| Countries That End in NIA | 0 | - | 4.93 | 100,366 |
| Countries That End in BIA | 0 | - | 4.91 | 125,427 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.93 | 152,454 |
| Countries Whose Names Start with Saint | 0 | - | 4.88 | 109,110 |
| Countries That End in RIA | 0 | - | 4.89 | 100,509 |
| Most Common Words in Official Country Names | 0 | - | 4.85 | 99,804 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 198,871 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 118,735 |
| Divided Country Name Puzzle #3 | 0 | - | 4.93 | 109,533 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 4.99 | 76,455 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 42,428 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 39,875 |
| Countries that End in L | 0 | - | 4.95 | 133,425 |
| "Land" Countries | 0 | - | 4.98 | 288,013 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 187,879 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.96 | 65,083 |
