| World's Longest Rivers | 0 | - | 4.88 | 121,161 |
| Countries With No Rivers | 0 | - | 4.96 | 76,068 |
| Name a Valid Country on Each River | 0 | - | 4.96 | 61,293 |
| World's Longest Rivers on a Map | 0 | - | 4.91 | 86,931 |
| Rivers of Europe Quiz | 0 | - | 4.89 | 55,660 |
| Tectonic Plates Map Quiz | 0 | - | 4.99 | 80,592 |
| Countries with the Longest Coastlines | 0 | - | 4.81 | 411,352 |
| Countries That Touch the Baltic Sea | 0 | - | 4.98 | 115,761 |
| North Sea Countries | 0 | - | 4.92 | 86,648 |
| Black Sea Countries | 0 | - | 4.87 | 60,357 |
| Countries That Touch the Red Sea | 0 | - | 4.90 | 65,043 |
| Caspian Sea Countries | 0 | - | 4.90 | 63,140 |
| Countries with the Shortest Coastlines | 0 | - | 4.89 | 66,972 |
| Seas on the World Map | 0 | - | 4.96 | 134,379 |
| Seas of the World | 0 | - | 5.00 | 154,564 |
| Famous Rivers | 0 | - | 4.74 | 104,558 |
| City to River #1 | 0 | - | 4.59 | 35,750 |
| Most Populous River Basins | 0 | - | 4.61 | 39,555 |
| Rivers that Flow through the Most Countries | 0 | - | 4.53 | 40,132 |
| Natural Features of Countries #1 | 0 | - | 4.86 | 83,403 |
| Countries with Fjords | 0 | - | 4.93 | 100,255 |
| Five Countries with the Longest Coastline by Continent | 0 | - | 4.97 | 114,796 |
| Countries Farthest From the Sea | 0 | - | 4.98 | 74,276 |
| Tectonic Plates on a Map | 0 | - | 4.97 | 35,307 |
| Layers of the Earth and Atmosphere | 0 | - | 4.97 | 50,207 |
| Largest Lakes in the United States on a Map | 0 | - | 4.90 | 29,710 |
| American Countries With No Atlantic Coastline | 0 | - | 4.94 | 91,968 |
| Biggest City by River | 0 | - | 4.41 | 52,707 |
| Countries Bordering the Four Color Seas | 0 | - | 4.92 | 22,783 |
| Rivers by City | 0 | - | 4.38 | 31,643 |
| City to River #2 - Difficult | 0 | - | 4.64 | 25,807 |
| Draw All Country Borders and Borderless Countries | 0 | - | 4.99 | 161,988 |
| Countries with the Longest Coastline Bordering Each Other | 0 | - | 4.89 | 28,255 |
| Biggest Lakes in the World | 0 | - | 4.62 | 89,039 |
| Great Lakes Quiz | 0 | - | 4.78 | 50,139 |
| Landforms Fill in the Blank | 0 | - | 4.41 | 91,479 |
| Cities on a Map of the Great Lakes | 0 | - | 4.41 | 44,331 |
| Megadiverse Countries | 0 | - | 4.97 | 133,954 |
| Gulfs and Bays on the World Map | 0 | - | 4.62 | 30,036 |
| Famous Lakes Quiz | 0 | - | 4.52 | 23,919 |
| Natural Features of Countries #2 | 0 | - | 4.55 | 37,346 |
| Geologic Time Scale | 0 | - | 4.46 | 9,931 |
| Rivers on Borders | 0 | - | 4.02 | 22,640 |
| Seas that Touch the Most Countries | 0 | - | 4.63 | 95,964 |
| U.S. Cities with Landforms in The Name | 0 | - | 4.26 | 70,739 |
| Atlantic Ocean General Knowledge | 0 | - | 4.74 | 21,167 |
| Indian Ocean General Knowledge | 0 | - | 4.52 | 22,156 |
| Bodies of Water by Cities | 0 | - | 4.77 | 28,469 |
| Landforms by Description Quiz | 0 | - | 4.33 | 25,980 |
| Capital Cities by Body of Water | 0 | - | 4.85 | 57,318 |
| Boundary Waters | 0 | - | 4.92 | 88,075 |
| Countries Along the Afro-Eurasia Coast | 0 | - | 4.85 | 34,844 |
| The Same Suffixes - Geography | 0 | - | 4.98 | 95,372 |
| 100 Geography Questions of Varying Difficulty | 0 | - | 4.94 | 61,412 |
| "Second Best" Geography Edition #2 | 0 | - | 4.87 | 59,895 |
| Countries of the World Quiz | 0 | - | 5.00 | 46,968,483 |
| Landlocked Countries | 0 | - | 4.99 | 414,224 |
| World Capitals Quiz | 0 | - | 5.00 | 5,035,413 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,721,837 |
| World Geography on a Map #1 | 0 | - | 4.94 | 73,211 |
| Geography Tile Select Quiz | 0 | - | 4.98 | 95,068 |
| Countries With More Than 100 Million People | 0 | - | 4.99 | 164,737 |
| Five Most Populated Countries by Hemisphere | 0 | - | 4.96 | 123,161 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 324,755 |
| Europe Capitals Quiz | 0 | - | 5.00 | 1,572,442 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 372,347 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 402,163 |
| Island Countries | 0 | - | 4.99 | 707,843 |
| Sahara Desert Countries | 0 | - | 4.98 | 160,831 |
| Himalayan Countries | 0 | - | 4.95 | 135,557 |
| Andean Countries | 0 | - | 4.94 | 82,943 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 62,304 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 123,349 |
| Coffee Producing Countries | 0 | - | 4.81 | 66,010 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 64,678 |
| Danube Countries | 0 | - | 4.97 | 71,130 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 115,837 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 85,598 |
| Countries with the Worst Passports | 0 | - | 4.94 | 82,609 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 147,520 |
| European Landlocked Countries | 0 | - | 4.99 | 145,829 |
| Partially Recognized Countries | 0 | - | 4.98 | 105,297 |
| Countries with the Most Species | 0 | - | 4.99 | 95,279 |
| Countries 197 to 205 | 0 | - | 4.89 | 69,440 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,219 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,388 |
| Countries that Use the Peso | 0 | - | 4.88 | 58,988 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.89 | 72,622 |
| Countries with a AAA Credit Rating | 0 | - | 4.85 | 57,000 |
| Countries in the Alps | 0 | - | 4.86 | 116,921 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 94,637 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 105,370 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,061 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 95,473 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 115,245 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.91 | 95,058 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 99,659 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 52,812 |
| Largest Country by Body of Water | 0 | - | 4.96 | 57,514 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,114 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,215 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,075 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,494 |
| Arctic Ocean Countries | 0 | - | 4.95 | 78,802 |
| Countries with the Most Grassland | 0 | - | 4.93 | 76,791 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 117,191 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 67,705 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,288 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 44,857 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 239,604 |
| World Countries - Blind Typing | 0 | - | 5.00 | 105,870 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 47,637 |
| Largest Countries By Category | 0 | - | 4.97 | 156,862 |
| Countries by Countries | 0 | - | 4.96 | 62,322 |
| Country Flags with the Most White | 0 | - | 4.87 | 137,503 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 61,982 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,348 |
| Six Degrees of Separation - Countries #1 | 0 | - | 4.96 | 98,174 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 87,827 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,040,282 |
| Northernmost Countries | 0 | - | 4.99 | 358,039 |
| Countries of South America | 0 | - | 5.00 | 915,841 |
| Countries of Oceania | 0 | - | 5.00 | 1,041,873 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,850,455 |
| "Land" Countries | 0 | - | 4.98 | 333,806 |
| Name a Valid Country Bordering Each Sea | 0 | - | 4.90 | 114,840 |
| 50 Largest Countries on the World Map Quiz | 0 | - | 4.98 | 144,779 |
| Western Europe Map Quiz | 0 | - | 4.87 | 93,509 |
| Top World Languages | 0 | - | 4.92 | 813,895 |
| Tourist Attraction by Negative Review | 0 | - | 4.86 | 81,602 |
| Who Controls It? #1 | 0 | - | 4.83 | 48,252 |
| Rivers A-Z | 0 | - | 4.35 | 32,694 |
| Border Crossings Quiz #1 | 0 | - | 4.99 | 206,595 |
| Border Crossings Quiz #2 | 0 | - | 4.99 | 127,676 |
| Longest International Borders | 0 | - | 4.99 | 263,907 |
| Countries with Three Borders | 0 | - | 4.96 | 36,225 |
| Country Connect by Northernmost Point | 0 | - | 4.96 | 41,634 |
| Largest Cities for each Latitude Degree | 0 | - | 4.99 | 47,721 |
| Demonym of Every Country | 0 | - | 4.91 | 58,705 |
| Analogies of Countries #1 | 0 | - | 4.88 | 68,181 |
| Name a Valid Answer - Geography | 0 | - | 4.95 | 103,588 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 171,577 |
| Countries with Megacities | 0 | - | 4.99 | 247,477 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 197,423 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 112,172 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 135,832 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 80,093 |
| Global Cities on a World Map | 0 | - | 4.93 | 134,928 |
| Northernmost Capital Cities | 0 | - | 4.98 | 109,091 |
| Most Remote Capital Cities | 0 | - | 4.92 | 52,733 |
| Capital Cities: Ports and Saints | 0 | - | 4.96 | 44,684 |
| Capitals with the Shortest Names | 0 | - | 4.97 | 107,754 |
| Same Letter Country and Capital | 0 | - | 4.99 | 155,587 |
| Countries by Capital City | 0 | - | 5.00 | 66,799 |
| Capital Cities Based on First Two Letters | 0 | - | 4.85 | 76,417 |
| Capitals of the Largest Countries by Area | 0 | - | 4.96 | 113,971 |
| Divided Capital Name Puzzle #1 | 0 | - | 4.99 | 83,467 |
| Moved Capital Cities | 0 | - | 4.96 | 73,649 |
| Countries by Official Language | 0 | - | 4.95 | 192,903 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 293,311 |
| Countries in their Native Language | 0 | - | 4.99 | 196,756 |
| Independence from Whom | 0 | - | 4.99 | 209,851 |
| Subdivisions by Country | 0 | - | 4.86 | 50,097 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 130,872 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 129,930 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 54,948 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,459 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 74,872 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 161,739 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,042 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,160 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,206 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,244 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 44,758 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 75,714 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,451 |
| Countries Furthest from the United States | 0 | - | 4.94 | 88,537 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,530 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 74,723 |
| Most Dispersed Island Nations | 0 | - | 4.96 | 71,052 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,364,020 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 108,757 |
| World Map Quiz | 0 | - | 4.81 | 63,619 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 153,035 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 106,399 |
| Countries by Founding Story | 0 | - | 4.95 | 76,602 |
| Countries by Road Signs | 0 | - | 4.98 | 53,168 |
| Southernmost Countries of the World | 0 | - | 4.99 | 226,478 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 104,249 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,010 |
| Countries With the Most Languages | 0 | - | 4.90 | 199,934 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 109,926 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.89 | 93,118 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,335 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 60,979 |
| Tallest Countries North to South | 0 | - | 4.83 | 119,381 |
| Widest Countries East to West | 0 | - | 4.92 | 128,663 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,226 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 185,303 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 97,594 |
