| Metals of Antiquity | 0 | - | 4.95 | 93,562 |
| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 109,750 |
| United States Map Quiz | 0 | - | 4.98 | 4,162,346 |
| Elements Named for Countries | 0 | - | 4.53 | 24,771 |
| Countries with Glaciers | 0 | - | 4.97 | 105,522 |
| Countries with the Most Forest | 0 | - | 4.87 | 147,649 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.89 | 64,739 |
| Boundary Waters | 0 | - | 4.92 | 88,546 |
| Countries Along the Afro-Eurasia Coast | 0 | - | 4.86 | 35,228 |
| The Same Suffixes - Geography | 0 | - | 4.98 | 96,224 |
| African Capitals - Map Quiz | 0 | - | 4.94 | 62,644 |
| European Capitals - Map Quiz | 0 | - | 4.97 | 119,464 |
| Asian Capitals - Map Quiz | 0 | - | 4.95 | 61,522 |
| "Stan" Countries - Map Quiz | 0 | - | 4.98 | 136,318 |
| Counties of England Map Quiz | 0 | - | 4.97 | 308,042 |
| UK Cities Map Quiz | 0 | - | 4.96 | 464,980 |
| Name the Constellations - With a Map | 0 | - | 4.92 | 36,004 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,556,043 |
| Landlocked Countries | 0 | - | 4.99 | 421,635 |
| Countries with the Most HIV | 0 | - | 4.46 | 44,472 |
| Countries with the Most Malaria Deaths | 0 | - | 4.45 | 45,365 |
| Countries Bordering the Mediterranean - Map Quiz | 0 | - | 4.87 | 89,130 |
| World Geography on a Map #1 | 0 | - | 4.94 | 73,692 |
| Geography Tile Select Quiz | 0 | - | 4.98 | 95,985 |
| Countries With More Than 100 Million People | 0 | - | 4.99 | 166,361 |
| Five Most Populated Countries by Hemisphere | 0 | - | 4.97 | 124,364 |
| World Capitals Quiz | 0 | - | 5.00 | 5,081,345 |
| South American Capitals - Map Quiz | 0 | - | 4.98 | 130,690 |
| Sahara Desert Countries | 0 | - | 4.98 | 164,279 |
| Himalayan Countries | 0 | - | 4.95 | 138,572 |
| Andean Countries | 0 | - | 4.93 | 84,521 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 63,705 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 125,705 |
| Coffee Producing Countries | 0 | - | 4.83 | 67,338 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,733 |
| Danube Countries | 0 | - | 4.97 | 71,961 |
| Countries With an "Ish" Demonym | 0 | - | 4.98 | 116,966 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,382 |
| Countries with the Worst Passports | 0 | - | 4.93 | 84,227 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 149,709 |
| European Landlocked Countries | 0 | - | 4.99 | 147,090 |
| Partially Recognized Countries | 0 | - | 4.98 | 106,569 |
| Countries with the Most Species | 0 | - | 4.99 | 103,200 |
| Countries 197 to 205 | 0 | - | 4.89 | 70,701 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,568 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,705 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,516 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,196 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,618 |
| Countries in the Alps | 0 | - | 4.87 | 118,151 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 100,877 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 106,977 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,620 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,564 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,457 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 95,922 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,629 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,461 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,157 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,811 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,633 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,493 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,186 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,435 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,485 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 118,818 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,283 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 63,203 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 46,010 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 243,751 |
| World Countries - Blind Typing | 0 | - | 5.00 | 107,999 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,193 |
| Largest Countries By Category | 0 | - | 4.97 | 158,150 |
| Countries by Countries | 0 | - | 4.96 | 63,160 |
| Country Flags with the Most White | 0 | - | 4.85 | 138,637 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,269 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,554 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 88,641 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,776,192 |
| 50 Largest Countries on the World Map Quiz | 0 | - | 4.98 | 145,682 |
| Western Europe Map Quiz | 0 | - | 4.86 | 93,846 |
| Tourist Attraction by Negative Review | 0 | - | 4.85 | 82,478 |
| Who Controls It? #1 | 0 | - | 4.83 | 48,482 |
| Border Crossings Quiz #1 | 0 | - | 4.99 | 208,906 |
| Border Crossings Quiz #2 | 0 | - | 4.99 | 128,266 |
| Longest International Borders | 0 | - | 4.99 | 265,138 |
| Countries with Three Borders | 0 | - | 4.96 | 36,592 |
| Country Connect by Northernmost Point | 0 | - | 4.96 | 42,101 |
| Largest Cities for each Latitude Degree | 0 | - | 4.99 | 48,199 |
| Demonym of Every Country | 0 | - | 4.91 | 60,603 |
| Elements by Picture | 0 | - | 4.27 | 70,047 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 331,295 |
| Europe Capitals Quiz | 0 | - | 5.00 | 1,589,686 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 375,415 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 406,987 |
| Island Countries | 0 | - | 4.99 | 710,911 |
| Least-Forested Countries | 0 | - | 4.53 | 65,266 |
| Tropical Rainforest Countries | 0 | - | 4.69 | 82,147 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,049,424 |
| Northernmost Countries | 0 | - | 4.99 | 361,799 |
| Countries with the Most Mangroves | 0 | - | 4.53 | 34,652 |
| Worst Plastic Polluting Countries | 0 | - | 4.51 | 66,605 |
| Countries of South America | 0 | - | 5.00 | 926,820 |
| Countries of Oceania | 0 | - | 5.00 | 1,056,251 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,876,216 |
| "Land" Countries | 0 | - | 4.98 | 337,234 |
| NBA Cities Map Quiz | 0 | - | 4.51 | 252,742 |
| MLB Cities Map Quiz | 0 | - | 4.50 | 69,677 |
| Top World Languages | 0 | - | 4.92 | 823,806 |
| Northernmost Countries Without Glaciers | 0 | - | 4.62 | 36,162 |
| Cities by Skyline Silhouette - Map Quiz | 0 | - | 4.93 | 124,128 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,382,817 |
| Europe Map Quiz | 0 | - | 5.00 | 4,768,729 |
| All Country Flags of the World | 0 | - | 5.00 | 3,675,753 |
| Organs of the Human Body (with map) | 0 | - | 4.10 | 119,477 |
| Analogies of Countries #1 | 0 | - | 4.89 | 68,444 |
| Pacific Ocean General Knowledge | 0 | - | 4.70 | 36,328 |
| Name a Valid Answer - Geography | 0 | - | 4.95 | 104,517 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,447,622 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 380,838 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 173,792 |
| Countries with Megacities | 0 | - | 4.99 | 264,356 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 199,651 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,419 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 137,921 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 81,487 |
| Biggest Cities in the World | 0 | - | 4.91 | 800,432 |
| Global Cities on a World Map | 0 | - | 4.93 | 136,386 |
| Northernmost Capital Cities | 0 | - | 4.98 | 110,471 |
| Most Remote Capital Cities | 0 | - | 4.92 | 53,516 |
| Capital Cities: Ports and Saints | 0 | - | 4.96 | 45,631 |
| Capitals with the Shortest Names | 0 | - | 4.97 | 109,435 |
| Same Letter Country and Capital | 0 | - | 4.99 | 157,237 |
| Countries by Capital City | 0 | - | 5.00 | 68,558 |
| Capital Cities Based on First Two Letters | 0 | - | 4.85 | 77,320 |
| Capitals of the Largest Countries by Area | 0 | - | 4.97 | 114,776 |
| World Capitals by Proximity | 0 | - | 4.91 | 331,939 |
| Divided Capital Name Puzzle #1 | 0 | - | 4.99 | 84,347 |
| Moved Capital Cities | 0 | - | 4.96 | 74,304 |
| Countries by Official Language | 0 | - | 4.95 | 195,190 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 296,273 |
| Countries in their Native Language | 0 | - | 4.99 | 198,979 |
| Independence from Whom | 0 | - | 4.99 | 212,001 |
| Subdivisions by Country | 0 | - | 4.86 | 50,418 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 132,669 |
| Megadiverse Countries | 0 | - | 4.96 | 134,981 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 132,022 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,331 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 126,213 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,093 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 163,072 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,575 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,415 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 154,006 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,629 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,126 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 77,618 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,855 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,181 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,946 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,334 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,473 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 111,085 |
| World Map Quiz | 0 | - | 4.81 | 65,036 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 157,103 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,320 |
| Countries with Tropical Rainforest and Glaciers | 0 | - | 4.51 | 55,682 |
| Countries by Founding Story | 0 | - | 4.95 | 77,339 |
| Southernmost Countries of the World | 0 | - | 4.99 | 228,013 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 105,238 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,957 |
| Countries With the Most Languages | 0 | - | 4.90 | 202,106 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,849 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,980 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,267 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,420 |
| Tallest Countries North to South | 0 | - | 4.83 | 120,548 |
| Widest Countries East to West | 0 | - | 4.92 | 129,613 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,441 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 186,339 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,108 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,748 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,555 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,829 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,362 |
| Countries with the Highest Percentage of Forest | 0 | - | 4.62 | 37,855 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,793 |
| Countries with Double Letters | 0 | - | 4.96 | 96,144 |
| Countries that End in N | 0 | - | 4.95 | 171,032 |
| Countries with Five Letters | 0 | - | 4.96 | 282,260 |
| Countries with Six Letters | 0 | - | 4.94 | 213,460 |
| Countries with W | 0 | - | 4.97 | 160,261 |
| Countries with Z | 0 | - | 4.98 | 291,344 |
| Countries with Letters Missing | 0 | - | 4.96 | 186,624 |
| Countries That End in U | 0 | - | 4.95 | 120,814 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 134,385 |
| Countries that End in O | 0 | - | 4.92 | 159,485 |
| Countries that End in R | 0 | - | 4.87 | 118,946 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,703 |
| Countries Ending in "IA" | 0 | - | 4.99 | 209,001 |
