| Countries of the World Quiz | 0 | - | 5.00 | 47,498,056 |
| Landlocked Countries | 0 | - | 4.99 | 420,973 |
| Countries with the Most Christians | 0 | - | 4.92 | 143,351 |
| Least Christian Countries with Exceptions | 0 | - | 4.90 | 88,315 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,770,941 |
| Sahara Desert Countries | 0 | - | 4.98 | 163,973 |
| Himalayan Countries | 0 | - | 4.95 | 138,285 |
| Andean Countries | 0 | - | 4.95 | 84,362 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 63,585 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 125,496 |
| Coffee Producing Countries | 0 | - | 4.83 | 67,207 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,621 |
| Danube Countries | 0 | - | 4.97 | 71,891 |
| Countries With an "Ish" Demonym | 0 | - | 4.98 | 116,861 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,283 |
| Countries with the Worst Passports | 0 | - | 4.94 | 84,081 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 149,548 |
| European Landlocked Countries | 0 | - | 4.99 | 147,022 |
| Partially Recognized Countries | 0 | - | 4.98 | 106,453 |
| Countries with the Most Species | 0 | - | 4.99 | 103,142 |
| Countries 197 to 205 | 0 | - | 4.89 | 70,597 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,533 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,674 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,467 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,149 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,553 |
| Countries in the Alps | 0 | - | 4.87 | 118,031 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 100,254 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 106,822 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,575 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,501 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,375 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 95,870 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,534 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,392 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,110 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,739 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,585 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,441 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,112 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,382 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,410 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 118,654 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,209 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,720 |
| Countries with the Most Catholics | 0 | - | 4.90 | 109,542 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,876 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 243,427 |
| World Countries - Blind Typing | 0 | - | 5.00 | 107,806 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,139 |
| Largest Countries By Category | 0 | - | 4.97 | 158,007 |
| Orthodox Countries | 0 | - | 4.92 | 132,043 |
| Countries by Countries | 0 | - | 4.96 | 63,076 |
| Battle to Country | 0 | - | 4.91 | 53,395 |
| Monarchies of Europe | 0 | - | 4.90 | 98,200 |
| Monarchies of Asia | 0 | - | 4.97 | 71,126 |
| Country Flags with the Most White | 0 | - | 4.85 | 138,528 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,237 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,529 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 88,562 |
| Asian Country Superlatives | 0 | - | 4.84 | 80,919 |
| Five Countries with Most Christians by Continent | 0 | - | 4.99 | 111,834 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 137,634 |
| 10 Asian Countries with the Most Tourists | 0 | - | 4.89 | 106,071 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 330,685 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 375,203 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 406,560 |
| Island Countries | 0 | - | 4.99 | 710,618 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,380,975 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,048,506 |
| Northernmost Countries | 0 | - | 4.99 | 361,478 |
| Countries of South America | 0 | - | 5.00 | 925,751 |
| Countries of Oceania | 0 | - | 5.00 | 1,054,952 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,873,517 |
| "Land" Countries | 0 | - | 4.98 | 336,964 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 199,527 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 120,658 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.87 | 134,823 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 92,250 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 193,185 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,088 |
| Top 10 Coldest Asian Countries | 0 | - | 4.95 | 123,016 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,446,506 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 380,519 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 173,614 |
| Countries with Megacities | 0 | - | 4.99 | 263,821 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 199,466 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,322 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 137,734 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 81,365 |
| Countries by Official Language | 0 | - | 4.95 | 195,035 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 296,091 |
| Countries in their Native Language | 0 | - | 4.99 | 198,540 |
| Independence from Whom | 0 | - | 4.99 | 211,840 |
| Subdivisions by Country | 0 | - | 4.86 | 50,384 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 132,466 |
| Megadiverse Countries | 0 | - | 4.96 | 134,923 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 131,898 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,285 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,868 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,073 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 162,978 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,520 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,314 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,967 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,591 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,048 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 77,452 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,815 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,127 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,905 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,284 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,436 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 110,861 |
| World Map Quiz | 0 | - | 4.81 | 64,941 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 156,675 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,239 |
| Countries by Founding Story | 0 | - | 4.95 | 77,273 |
| Countries by Road Signs | 0 | - | 4.98 | 53,878 |
| Southernmost Countries of the World | 0 | - | 4.99 | 227,877 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 105,151 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,875 |
| Countries With the Most Languages | 0 | - | 4.90 | 201,911 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,788 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,917 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,211 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,386 |
| Tallest Countries North to South | 0 | - | 4.83 | 120,491 |
| Widest Countries East to West | 0 | - | 4.92 | 129,558 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,425 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 186,244 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,083 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,679 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,463 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,751 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,331 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,777 |
| Countries with Double Letters | 0 | - | 4.97 | 95,902 |
| Countries that End in N | 0 | - | 4.95 | 170,817 |
| Countries with Five Letters | 0 | - | 4.96 | 281,922 |
| Countries with Six Letters | 0 | - | 4.94 | 213,236 |
| Countries with W | 0 | - | 4.97 | 160,097 |
| Countries with Z | 0 | - | 4.98 | 291,096 |
| Countries with Letters Missing | 0 | - | 4.96 | 186,449 |
| Countries That End in U | 0 | - | 4.95 | 120,719 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 134,226 |
| Countries that End in O | 0 | - | 4.92 | 159,421 |
| Countries that End in R | 0 | - | 4.87 | 118,890 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,658 |
| Countries Ending in "IA" | 0 | - | 4.99 | 208,829 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 170,516 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,355 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 142,204 |
| Countries That End in Y | 0 | - | 4.91 | 185,800 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 197,710 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 152,712 |
| Countries that End in I | 0 | - | 4.94 | 135,022 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 183,881 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,744 |
| Countries That End in NIA | 0 | - | 4.92 | 109,691 |
| Countries That End in BIA | 0 | - | 4.93 | 149,082 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,967 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,298 |
| Countries That End in RIA | 0 | - | 4.93 | 126,728 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 110,887 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 227,280 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 133,522 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 125,925 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 91,494 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,497 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,909 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,407 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,402 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,348 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,136 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 53,827 |
| Countries that End in L | 0 | - | 4.94 | 156,738 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 215,114 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,230 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,942 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,880 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,912 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 249,536 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 200,496 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 142,881 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 163,403 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 225,199 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 152,772 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 71,040 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,663 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,794 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,830,693 |
| One Border Countries | 0 | - | 4.98 | 468,891 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,626,376 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.93 | 84,119 |
| Top 10 Richest Countries in Africa | 0 | - | 4.85 | 76,320 |
| Top 10 Richest Countries in Europe | 0 | - | 4.90 | 149,820 |
| Countries that Visit Japan the Most | 0 | - | 4.93 | 77,485 |
| Most-Visited Countries by Japanese | 0 | - | 4.95 | 60,184 |
| Most-Visited Countries by Canadians | 0 | - | 4.82 | 39,412 |
