| Countries of the World Quiz | 0 | - | 5.00 | 47,534,403 |
| Countries by National Anthem | 0 | - | 4.93 | 71,269 |
| Landlocked Countries | 0 | - | 4.99 | 421,376 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,774,291 |
| Sahara Desert Countries | 0 | - | 4.98 | 164,157 |
| Himalayan Countries | 0 | - | 4.95 | 138,451 |
| Andean Countries | 0 | - | 4.93 | 84,452 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 63,652 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 125,620 |
| Coffee Producing Countries | 0 | - | 4.83 | 67,286 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,689 |
| Danube Countries | 0 | - | 4.97 | 71,939 |
| Countries With an "Ish" Demonym | 0 | - | 4.98 | 116,925 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,354 |
| Countries with the Worst Passports | 0 | - | 4.93 | 84,173 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 149,637 |
| European Landlocked Countries | 0 | - | 4.99 | 147,065 |
| Partially Recognized Countries | 0 | - | 4.98 | 106,518 |
| Countries with the Most Species | 0 | - | 4.99 | 103,174 |
| Countries 197 to 205 | 0 | - | 4.89 | 70,670 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,547 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,694 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,497 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,179 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,593 |
| Countries in the Alps | 0 | - | 4.87 | 118,106 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 100,672 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 106,923 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,602 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,537 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,422 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 95,895 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,589 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,442 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,139 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,791 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,615 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,477 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,162 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,417 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,453 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 118,743 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,246 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 62,141 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,968 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 243,629 |
| World Countries - Blind Typing | 0 | - | 5.00 | 107,924 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,171 |
| Largest Countries By Category | 0 | - | 4.97 | 158,094 |
| Countries by Countries | 0 | - | 4.96 | 63,127 |
| Country Flags with the Most White | 0 | - | 4.85 | 138,601 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,254 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,544 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 88,611 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 331,079 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 375,335 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 406,846 |
| Island Countries | 0 | - | 4.99 | 710,819 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,049,067 |
| Northernmost Countries | 0 | - | 4.99 | 361,685 |
| Countries of South America | 0 | - | 5.00 | 926,439 |
| Countries of Oceania | 0 | - | 5.00 | 1,055,758 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,875,280 |
| "Land" Countries | 0 | - | 4.98 | 337,142 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,382,155 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 173,738 |
| Countries with Megacities | 0 | - | 4.99 | 264,185 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 199,585 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,390 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 137,848 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 81,450 |
| Countries by Official Language | 0 | - | 4.95 | 195,128 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 296,202 |
| Countries in their Native Language | 0 | - | 4.99 | 198,922 |
| Independence from Whom | 0 | - | 4.99 | 211,946 |
| Subdivisions by Country | 0 | - | 4.86 | 50,400 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 132,628 |
| Megadiverse Countries | 0 | - | 4.96 | 134,960 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 131,970 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,316 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,972 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,088 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 163,035 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,559 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,374 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,996 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,611 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,076 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 77,554 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,842 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,162 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,929 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,317 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,462 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 111,009 |
| World Map Quiz | 0 | - | 4.81 | 65,006 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 156,947 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,290 |
| Countries by Founding Story | 0 | - | 4.95 | 77,312 |
| Countries by Road Signs | 0 | - | 4.98 | 53,948 |
| Southernmost Countries of the World | 0 | - | 4.99 | 227,973 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 105,209 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,931 |
| Countries With the Most Languages | 0 | - | 4.90 | 202,048 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,822 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,957 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,251 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,408 |
| Tallest Countries North to South | 0 | - | 4.83 | 120,523 |
| Widest Countries East to West | 0 | - | 4.92 | 129,589 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,436 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 186,316 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,098 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,724 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,522 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,799 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,350 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,789 |
| Countries with Double Letters | 0 | - | 4.96 | 96,078 |
| Countries that End in N | 0 | - | 4.95 | 170,962 |
| Countries with Five Letters | 0 | - | 4.96 | 282,148 |
| Countries with Six Letters | 0 | - | 4.94 | 213,382 |
| Countries with W | 0 | - | 4.97 | 160,208 |
| Countries with Z | 0 | - | 4.98 | 291,266 |
| Countries with Letters Missing | 0 | - | 4.96 | 186,565 |
| Countries That End in U | 0 | - | 4.95 | 120,774 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 134,332 |
| Countries that End in O | 0 | - | 4.92 | 159,462 |
| Countries that End in R | 0 | - | 4.87 | 118,925 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,685 |
| Countries Ending in "IA" | 0 | - | 4.99 | 208,941 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 170,604 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,406 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 142,321 |
| Countries That End in Y | 0 | - | 4.91 | 185,835 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 197,805 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 152,769 |
| Countries that End in I | 0 | - | 4.94 | 135,047 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 183,981 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,769 |
| Countries That End in NIA | 0 | - | 4.92 | 109,722 |
| Countries That End in BIA | 0 | - | 4.93 | 149,127 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 167,025 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,359 |
| Countries That End in RIA | 0 | - | 4.93 | 126,765 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 110,946 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 227,415 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 133,601 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 125,994 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 91,567 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,538 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,955 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,427 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,457 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,382 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,204 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 53,897 |
| Countries that End in L | 0 | - | 4.94 | 156,768 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 215,396 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,245 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,974 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,902 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,946 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 249,631 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 200,568 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 142,922 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 163,452 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 225,332 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 152,812 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 71,064 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,685 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,835 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,447,184 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 380,738 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,832,437 |
| One Border Countries | 0 | - | 4.98 | 469,507 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,628,960 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.96 | 86,833 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 268,053 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 122,034 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,497 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 93,656 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 59,168 |
| Majority Muslim Countries | 0 | - | 4.98 | 375,098 |
| NATO Countries | 0 | - | 4.98 | 281,125 |
| EU Countries Quiz | 0 | - | 4.99 | 275,047 |
| Recently Independent Countries | 0 | - | 4.98 | 159,388 |
| French-Speaking Countries | 0 | - | 4.85 | 270,733 |
| Natural Features of Countries #1 | 0 | - | 4.87 | 83,872 |
| Countries That Use the Euro | 0 | - | 4.95 | 105,328 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 288,973 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 273,948 |
| German-Speaking Countries | 0 | - | 4.91 | 145,669 |
| Word Scramble - Countries | 0 | - | 4.87 | 2,103,777 |
| Countries with Wild Tigers | 0 | - | 4.96 | 136,918 |
| Countries with Wild Penguins | 0 | - | 4.94 | 100,249 |
| Top Five Countries By Category #1 | 0 | - | 4.99 | 451,267 |
| Solve the Secret Country #1 | 0 | - | 4.94 | 166,117 |
| Top Five Countries by Religion | 0 | - | 4.93 | 171,989 |
| Solve the Secret Country #2 | 0 | - | 4.87 | 118,696 |
