| Metals of Antiquity | 0 | - | 4.95 | 93,418 |
| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 109,709 |
| United States Map Quiz | 0 | - | 4.98 | 4,157,378 |
| Elements Named for Countries | 0 | - | 4.53 | 24,684 |
| Countries with Glaciers | 0 | - | 4.97 | 105,394 |
| Countries with the Most Forest | 0 | - | 4.87 | 147,527 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.89 | 64,634 |
| Boundary Waters | 0 | - | 4.92 | 88,452 |
| Countries Along the Afro-Eurasia Coast | 0 | - | 4.85 | 35,138 |
| The Same Suffixes - Geography | 0 | - | 4.98 | 96,042 |
| African Capitals - Map Quiz | 0 | - | 4.94 | 62,429 |
| European Capitals - Map Quiz | 0 | - | 4.97 | 119,205 |
| Asian Capitals - Map Quiz | 0 | - | 4.95 | 61,315 |
| "Stan" Countries - Map Quiz | 0 | - | 4.98 | 135,753 |
| Counties of England Map Quiz | 0 | - | 4.97 | 307,566 |
| UK Cities Map Quiz | 0 | - | 4.96 | 464,426 |
| Name the Constellations - With a Map | 0 | - | 4.92 | 35,918 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,426,579 |
| Landlocked Countries | 0 | - | 4.99 | 420,036 |
| Countries with the Most HIV | 0 | - | 4.46 | 44,439 |
| Countries with the Most Malaria Deaths | 0 | - | 4.45 | 45,268 |
| Countries Bordering the Mediterranean - Map Quiz | 0 | - | 4.87 | 89,006 |
| World Geography on a Map #1 | 0 | - | 4.94 | 73,573 |
| Geography Tile Select Quiz | 0 | - | 4.98 | 95,780 |
| Countries With More Than 100 Million People | 0 | - | 4.99 | 165,892 |
| Five Most Populated Countries by Hemisphere | 0 | - | 4.97 | 124,098 |
| World Capitals Quiz | 0 | - | 5.00 | 5,071,130 |
| South American Capitals - Map Quiz | 0 | - | 4.98 | 130,421 |
| Sahara Desert Countries | 0 | - | 4.98 | 163,490 |
| Himalayan Countries | 0 | - | 4.95 | 137,909 |
| Andean Countries | 0 | - | 4.95 | 84,172 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 63,380 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 124,966 |
| Coffee Producing Countries | 0 | - | 4.83 | 67,037 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,486 |
| Danube Countries | 0 | - | 4.97 | 71,775 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 116,717 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,172 |
| Countries with the Worst Passports | 0 | - | 4.94 | 83,875 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 148,967 |
| European Landlocked Countries | 0 | - | 4.99 | 146,910 |
| Partially Recognized Countries | 0 | - | 4.98 | 106,304 |
| Countries with the Most Species | 0 | - | 4.99 | 103,045 |
| Countries 197 to 205 | 0 | - | 4.89 | 70,452 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,470 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,638 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,403 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,082 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,471 |
| Countries in the Alps | 0 | - | 4.87 | 117,895 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 97,667 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 106,613 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,512 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,398 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,244 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 95,807 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,409 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,292 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,044 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,659 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,549 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,390 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,021 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,312 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,321 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 118,447 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,141 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,649 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,717 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 242,953 |
| World Countries - Blind Typing | 0 | - | 5.00 | 107,536 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,069 |
| Largest Countries By Category | 0 | - | 4.97 | 157,848 |
| Countries by Countries | 0 | - | 4.97 | 62,961 |
| Country Flags with the Most White | 0 | - | 4.85 | 138,391 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,194 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,498 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 88,454 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,764,721 |
| 50 Largest Countries on the World Map Quiz | 0 | - | 4.98 | 145,519 |
| Western Europe Map Quiz | 0 | - | 4.86 | 93,788 |
| Tourist Attraction by Negative Review | 0 | - | 4.86 | 82,324 |
| Who Controls It? #1 | 0 | - | 4.83 | 48,431 |
| Border Crossings Quiz #1 | 0 | - | 4.99 | 208,473 |
| Border Crossings Quiz #2 | 0 | - | 4.99 | 128,153 |
| Longest International Borders | 0 | - | 4.99 | 264,874 |
| Countries with Three Borders | 0 | - | 4.96 | 36,515 |
| Country Connect by Northernmost Point | 0 | - | 4.96 | 41,992 |
| Largest Cities for each Latitude Degree | 0 | - | 4.99 | 48,106 |
| Demonym of Every Country | 0 | - | 4.91 | 59,639 |
| Elements by Picture | 0 | - | 4.27 | 69,930 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 329,951 |
| Europe Capitals Quiz | 0 | - | 5.00 | 1,585,492 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 374,926 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 405,984 |
| Island Countries | 0 | - | 4.99 | 710,219 |
| Least-Forested Countries | 0 | - | 4.53 | 65,189 |
| Tropical Rainforest Countries | 0 | - | 4.69 | 82,059 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,047,374 |
| Northernmost Countries | 0 | - | 4.99 | 361,038 |
| Countries with the Most Mangroves | 0 | - | 4.53 | 34,620 |
| Worst Plastic Polluting Countries | 0 | - | 4.51 | 66,513 |
| Countries of South America | 0 | - | 5.00 | 924,511 |
| Countries of Oceania | 0 | - | 5.00 | 1,053,373 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,870,500 |
| "Land" Countries | 0 | - | 4.98 | 336,094 |
| NBA Cities Map Quiz | 0 | - | 4.51 | 252,175 |
| MLB Cities Map Quiz | 0 | - | 4.50 | 69,494 |
| Top World Languages | 0 | - | 4.92 | 821,751 |
| Northernmost Countries Without Glaciers | 0 | - | 4.62 | 36,143 |
| Cities by Skyline Silhouette - Map Quiz | 0 | - | 4.93 | 123,860 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,378,536 |
| Europe Map Quiz | 0 | - | 5.00 | 4,761,459 |
| All Country Flags of the World | 0 | - | 5.00 | 3,660,716 |
| Organs of the Human Body (with map) | 0 | - | 4.10 | 119,241 |
| Analogies of Countries #1 | 0 | - | 4.88 | 68,379 |
| Pacific Ocean General Knowledge | 0 | - | 4.69 | 36,306 |
| Name a Valid Answer - Geography | 0 | - | 4.95 | 104,310 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,445,089 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 380,184 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 173,362 |
| Countries with Megacities | 0 | - | 4.99 | 262,947 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 199,196 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,176 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 137,500 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 81,216 |
| Biggest Cities in the World | 0 | - | 4.91 | 798,270 |
| Global Cities on a World Map | 0 | - | 4.93 | 136,065 |
| Northernmost Capital Cities | 0 | - | 4.98 | 110,185 |
| Most Remote Capital Cities | 0 | - | 4.92 | 53,363 |
| Capital Cities: Ports and Saints | 0 | - | 4.96 | 45,444 |
| Capitals with the Shortest Names | 0 | - | 4.97 | 109,170 |
| Same Letter Country and Capital | 0 | - | 4.99 | 156,908 |
| Countries by Capital City | 0 | - | 5.00 | 68,191 |
| Capital Cities Based on First Two Letters | 0 | - | 4.85 | 77,129 |
| Capitals of the Largest Countries by Area | 0 | - | 4.97 | 114,612 |
| World Capitals by Proximity | 0 | - | 4.91 | 331,247 |
| Divided Capital Name Puzzle #1 | 0 | - | 4.99 | 84,144 |
| Moved Capital Cities | 0 | - | 4.96 | 74,166 |
| Countries by Official Language | 0 | - | 4.95 | 194,861 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 295,837 |
| Countries in their Native Language | 0 | - | 4.99 | 198,399 |
| Independence from Whom | 0 | - | 4.99 | 211,620 |
| Subdivisions by Country | 0 | - | 4.86 | 50,341 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,913 |
| Megadiverse Countries | 0 | - | 4.96 | 134,848 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 131,734 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,236 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,818 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,052 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 162,856 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,456 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,151 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,911 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,545 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,030 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 77,272 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,779 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,065 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,846 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,228 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,399 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 110,538 |
| World Map Quiz | 0 | - | 4.81 | 64,797 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 156,193 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,154 |
| Countries with Tropical Rainforest and Glaciers | 0 | - | 4.51 | 55,636 |
| Countries by Founding Story | 0 | - | 4.95 | 77,173 |
| Southernmost Countries of the World | 0 | - | 4.99 | 227,717 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 105,055 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,777 |
| Countries With the Most Languages | 0 | - | 4.90 | 201,668 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,659 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,796 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,934 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,336 |
| Tallest Countries North to South | 0 | - | 4.83 | 120,400 |
| Widest Countries East to West | 0 | - | 4.92 | 129,465 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,410 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 186,114 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,042 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,606 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,367 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,664 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,292 |
| Countries with the Highest Percentage of Forest | 0 | - | 4.62 | 37,811 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,752 |
| Countries with Double Letters | 0 | - | 4.97 | 95,315 |
| Countries that End in N | 0 | - | 4.95 | 170,346 |
| Countries with Five Letters | 0 | - | 4.96 | 281,177 |
| Countries with Six Letters | 0 | - | 4.94 | 212,758 |
| Countries with W | 0 | - | 4.97 | 159,678 |
| Countries with Z | 0 | - | 4.98 | 290,568 |
| Countries with Letters Missing | 0 | - | 4.96 | 185,944 |
| Countries That End in U | 0 | - | 4.95 | 120,501 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 133,947 |
| Countries that End in O | 0 | - | 4.92 | 159,273 |
| Countries that End in R | 0 | - | 4.87 | 118,794 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,561 |
| Countries Ending in "IA" | 0 | - | 4.99 | 208,560 |
