| Capital Cities by Body of Water | 0 | - | 4.85 | 57,318 |
| African Great Lakes | 0 | - | 4.82 | 65,271 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 70,821 |
| Top 10 European Countries by Coastline | 0 | - | 4.87 | 137,899 |
| Top 10 American Countries by Coastline | 0 | - | 4.96 | 88,101 |
| Top 10 Asian Countries by Coastline | 0 | - | 4.92 | 96,182 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 64,884 |
| Name a Valid Country Bordering Each Sea | 0 | - | 4.90 | 114,840 |
| African Great Lake Countries with an Empty Map | 0 | - | 4.97 | 60,482 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 38,836 |
| Countries with Wild Tigers | 0 | - | 4.96 | 135,656 |
| Countries with Wild Penguins | 0 | - | 4.94 | 99,344 |
| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 109,556 |
| Countries with the Most Venomous Animal Species | 0 | - | 4.88 | 86,452 |
| Asian Physical Geography | 0 | - | 4.61 | 35,381 |
| Rivers of the United States | 0 | - | 4.93 | 65,590 |
| Countries with Glaciers | 0 | - | 4.97 | 104,705 |
| Countries with the Most Forest | 0 | - | 4.87 | 146,687 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.89 | 64,274 |
| Countries with the Most Sheep | 0 | - | 4.92 | 102,465 |
| Countries With The Most Bird Species | 0 | - | 4.93 | 32,469 |
| Landforms by Country | 0 | - | 4.52 | 51,920 |
| Bodies of Water around the Arabian Peninsula | 0 | - | 4.74 | 35,920 |
| Organs of the Human Body (with map) | 0 | - | 4.10 | 118,566 |
| Animal Anatomy Quiz | 0 | - | 4.39 | 59,683 |
| Capitals by River | 0 | - | 4.55 | 48,243 |
| Countries that Catch the Most Fish | 0 | - | 4.90 | 111,539 |
| Countries with the Most Wolves | 0 | - | 4.92 | 107,088 |
| Geological Extremes | 0 | - | 4.34 | 39,951 |
| African Physical Geography | 0 | - | 4.51 | 31,575 |
| European Physical Geography | 0 | - | 4.26 | 33,382 |
| Name the Constellations - With a Map | 0 | - | 4.92 | 35,682 |
| Countries With Two or More Bear Species | 0 | - | 4.90 | 22,487 |
| South China Sea Countries | 0 | - | 4.78 | 57,508 |
| Boundary Waters | 0 | - | 4.92 | 88,077 |
| Countries Along the Afro-Eurasia Coast | 0 | - | 4.85 | 34,844 |
| The Same Suffixes - Geography | 0 | - | 4.98 | 95,372 |
| Countries of the World Quiz | 0 | - | 5.00 | 46,969,142 |
| Countries with the Most HIV | 0 | - | 4.46 | 44,326 |
| Countries with the Most Wild Elephants | 0 | - | 4.63 | 54,650 |
| Animal Populations of Countries | 0 | - | 4.51 | 43,627 |
| Countries with the Most Malaria Deaths | 0 | - | 4.47 | 44,915 |
| Top 15 Countries with the Most Cows | 0 | - | 4.64 | 92,793 |
| Bodies of Water by Satellite Image #1 | 0 | - | 4.20 | 71,303 |
| Oceania Physical Geography | 0 | - | 4.30 | 12,636 |
| South American Physical Geography | 0 | - | 4.58 | 18,279 |
| Seas of Europe | 0 | - | 4.37 | 83,841 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 97,911 |
| World Capitals Quiz | 0 | - | 5.00 | 5,035,461 |
| Landlocked Countries | 0 | - | 4.99 | 414,228 |
| Countries with NO Snakes | 0 | - | 4.51 | 63,506 |
| Least-Forested Countries | 0 | - | 4.53 | 64,926 |
| Top 10 African Countries by Coastline | 0 | - | 4.27 | 47,830 |
| Bay of Bengal Countries With an Empty Map | 0 | - | 4.64 | 75,236 |
| Tropical Rainforest Countries | 0 | - | 4.68 | 81,751 |
| Countries with the Most Mangroves | 0 | - | 4.53 | 34,473 |
| Worst Plastic Polluting Countries | 0 | - | 4.51 | 66,122 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,721,884 |
| Countries with More Cows than People | 0 | - | 4.43 | 54,665 |
| Countries Closest to the Aegean Sea | 0 | - | 4.75 | 66,666 |
| Mekong River Countries Empty Map Quiz | 0 | - | 4.80 | 53,005 |
| Sea in the Answers | 0 | - | 4.10 | 48,585 |
| Northernmost Countries Without Glaciers | 0 | - | 4.61 | 36,078 |
| World Geography on a Map #1 | 0 | - | 4.94 | 73,212 |
| Countries With More Than 100 Million People | 0 | - | 4.99 | 164,740 |
| Five Most Populated Countries by Hemisphere | 0 | - | 4.96 | 123,162 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 324,760 |
| Europe Capitals Quiz | 0 | - | 5.00 | 1,572,454 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 372,351 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 402,165 |
| Island Countries | 0 | - | 4.99 | 707,845 |
| Sahara Desert Countries | 0 | - | 4.98 | 160,833 |
| Himalayan Countries | 0 | - | 4.95 | 135,560 |
| Andean Countries | 0 | - | 4.94 | 82,944 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 62,306 |
| 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 | 64,679 |
| Danube Countries | 0 | - | 4.97 | 71,131 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 115,839 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 85,599 |
| Countries with the Worst Passports | 0 | - | 4.94 | 82,610 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 147,522 |
| European Landlocked Countries | 0 | - | 4.99 | 145,830 |
| Partially Recognized Countries | 0 | - | 4.98 | 105,299 |
| Countries with the Most Species | 0 | - | 4.99 | 95,280 |
| Countries 197 to 205 | 0 | - | 4.89 | 69,440 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,220 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,388 |
| Countries that Use the Peso | 0 | - | 4.88 | 58,989 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.89 | 72,624 |
| Countries with a AAA Credit Rating | 0 | - | 4.85 | 57,001 |
| 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 | 105,371 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,062 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 95,475 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 115,247 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.91 | 95,058 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 99,662 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 52,813 |
| Largest Country by Body of Water | 0 | - | 4.96 | 57,515 |
| 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 | 41,076 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,496 |
| Arctic Ocean Countries | 0 | - | 4.95 | 78,803 |
| Countries with the Most Grassland | 0 | - | 4.93 | 76,793 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 117,194 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 67,705 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,289 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 44,858 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 239,606 |
| World Countries - Blind Typing | 0 | - | 5.00 | 105,871 |
| 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 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,364,039 |
| Country Flags with the Most White | 0 | - | 4.87 | 137,504 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 61,982 |
| Countries with Tropical Rainforest and Glaciers | 0 | - | 4.51 | 55,456 |
| Countries with Wild Lions | 0 | - | 4.77 | 26,005 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 87,828 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,040,296 |
| Northernmost Countries | 0 | - | 4.99 | 358,046 |
| Countries with the Highest Percentage of Forest | 0 | - | 4.62 | 37,693 |
| Countries of South America | 0 | - | 5.00 | 915,863 |
| Countries of Oceania | 0 | - | 5.00 | 1,041,894 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,850,486 |
| "Land" Countries | 0 | - | 4.98 | 333,808 |
| Top 10 Countries with the Most Horses | 0 | - | 4.49 | 68,707 |
| Europe Map Quiz | 0 | - | 5.00 | 4,734,226 |
| 50 Largest Countries on the World Map Quiz | 0 | - | 4.98 | 144,779 |
| Western Europe Map Quiz | 0 | - | 4.87 | 93,509 |
| All Country Flags of the World | 0 | - | 5.00 | 3,607,916 |
| Bodies of Water by Satellite Image #2 | 0 | - | 4.36 | 19,586 |
| Top World Languages | 0 | - | 4.92 | 813,908 |
| Tourist Attraction by Negative Review | 0 | - | 4.86 | 81,602 |
| Who Controls It? #1 | 0 | - | 4.83 | 48,253 |
| Longest Rivers in the UK | 0 | - | 4.42 | 13,740 |
| Border Crossings Quiz #1 | 0 | - | 4.99 | 206,600 |
| Border Crossings Quiz #2 | 0 | - | 4.99 | 127,676 |
| Longest International Borders | 0 | - | 4.99 | 263,915 |
| Countries with Three Borders | 0 | - | 4.96 | 36,226 |
| 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 | 58,706 |
| Where Do Musk Oxen Live? | 0 | - | 4.63 | 15,258 |
| Elements Named for Countries | 0 | - | 4.52 | 24,430 |
| Analogies of Countries #1 | 0 | - | 4.88 | 68,183 |
| Name a Valid Answer - Geography | 0 | - | 4.95 | 103,590 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,436,115 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 377,904 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 171,580 |
| Countries with Megacities | 0 | - | 4.99 | 247,482 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 197,428 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 112,174 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 135,837 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 80,094 |
| Biggest Cities in the World | 0 | - | 4.91 | 791,141 |
| Global Cities on a World Map | 0 | - | 4.93 | 134,931 |
| Northernmost Capital Cities | 0 | - | 4.98 | 109,093 |
| Most Remote Capital Cities | 0 | - | 4.92 | 52,734 |
| Capital Cities: Ports and Saints | 0 | - | 4.96 | 44,685 |
| Capitals with the Shortest Names | 0 | - | 4.97 | 107,757 |
| Same Letter Country and Capital | 0 | - | 4.99 | 155,587 |
| Countries by Capital City | 0 | - | 5.00 | 66,801 |
| Capital Cities Based on First Two Letters | 0 | - | 4.85 | 76,417 |
| Capitals of the Largest Countries by Area | 0 | - | 4.96 | 113,971 |
| World Capitals by Proximity | 0 | - | 4.91 | 328,707 |
| Divided Capital Name Puzzle #1 | 0 | - | 4.99 | 83,469 |
| Moved Capital Cities | 0 | - | 4.96 | 73,650 |
| Countries by Official Language | 0 | - | 4.95 | 192,904 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 293,315 |
| Countries in their Native Language | 0 | - | 4.99 | 196,758 |
| Independence from Whom | 0 | - | 4.99 | 209,854 |
| Subdivisions by Country | 0 | - | 4.86 | 50,097 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 130,873 |
| Megadiverse Countries | 0 | - | 4.97 | 133,955 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 129,932 |
| 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 | 161,740 |
| 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 | 75,717 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,451 |
| Countries Furthest from the United States | 0 | - | 4.94 | 88,538 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,532 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 74,724 |
| Most Dispersed Island Nations | 0 | - | 4.96 | 71,052 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 108,763 |
| Which Country of the United Kingdom? | 0 | - | 4.58 | 39,080 |
| World Map Quiz | 0 | - | 4.81 | 63,620 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 153,043 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 106,400 |
