| American Countries With No Atlantic Coastline | 0 | - | 4.94 | 92,368 |
| Countries with Wild Tigers | 0 | - | 4.96 | 136,520 |
| Countries with Wild Penguins | 0 | - | 4.94 | 100,024 |
| Countries with the Most Venomous Animal Species | 0 | - | 4.87 | 87,076 |
| United States Map Quiz | 0 | - | 4.98 | 4,154,913 |
| "Big Five" African Game Animals | 0 | - | 4.22 | 47,353 |
| 10 Biggest American Countries by Area | 0 | - | 4.95 | 112,542 |
| Top 10 Most Populous American Countries | 0 | - | 4.97 | 144,131 |
| Latin American Countries Map Quiz | 0 | - | 4.97 | 129,482 |
| South America Map Quiz | 0 | - | 5.00 | 1,547,989 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,021,188 |
| North America Map Quiz | 0 | - | 4.98 | 247,957 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,672 |
| Canada Provinces and Territories | 0 | - | 5.00 | 341,663 |
| Canada Provinces Map Quiz | 0 | - | 4.99 | 639,431 |
| Most Spoken Languages in Canada | 0 | - | 4.91 | 55,065 |
| Countries with the Most Sheep | 0 | - | 4.92 | 103,107 |
| Central America and Caribbean Map Quiz | 0 | - | 4.89 | 901,681 |
| North American Capitals - Map Quiz | 0 | - | 4.87 | 57,769 |
| Countries of North America with an Empty Map | 0 | - | 4.99 | 94,582 |
| All First-Level Subdivisions of North America on a Map | 0 | - | 4.97 | 63,932 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,385 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,247 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,367 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 73,803 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,845 |
| Countries With Two or More Bear Species | 0 | - | 4.90 | 22,727 |
| Countries with the Most Wolves | 0 | - | 4.92 | 107,899 |
| Countries that Catch the Most Fish | 0 | - | 4.90 | 112,359 |
| Largest Land Animals of Africa | 0 | - | 4.36 | 12,745 |
| African Great Lakes | 0 | - | 4.82 | 66,094 |
| American Countries on the Pacific Coast | 0 | - | 4.80 | 49,214 |
| Countries of South America with an Empty Map | 0 | - | 4.94 | 104,816 |
| Central American Countries | 0 | - | 4.98 | 156,056 |
| Caribbean / Lesser Antilles Map Quiz | 0 | - | 4.99 | 148,062 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 529,034 |
| Countries with the Most Wild Elephants | 0 | - | 4.63 | 54,926 |
| Animal Populations of Countries | 0 | - | 4.52 | 43,834 |
| North American Cat-Named Sports Teams | 0 | - | 4.43 | 33,655 |
| Animals by Skeleton Image | 0 | - | 4.80 | 46,390 |
| Animals by Close-up Image | 0 | - | 4.42 | 217,677 |
| Aquatic Mammals by Picture | 0 | - | 4.41 | 45,574 |
| Extinct Animals by Picture | 0 | - | 4.49 | 35,186 |
| Mammals by Picture #1 | 0 | - | 4.70 | 91,704 |
| Top 15 Countries with the Most Cows | 0 | - | 4.72 | 104,737 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 267,964 |
| Top 10 American Countries by Coastline | 0 | - | 4.96 | 88,350 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 82,415 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 159,825 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 177,608 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 125,092 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,441 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 86,137 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.85 | 67,419 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,373 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 278,798 |
| Name that Bug | 0 | - | 4.12 | 45,538 |
| African Physical Geography | 0 | - | 4.51 | 31,670 |
| Animals of Australia | 0 | - | 4.52 | 42,296 |
| Most-Spoken Languages of the United States | 0 | - | 4.52 | 219,399 |
| Canada Geography Trivia | 0 | - | 4.80 | 47,509 |
| Asian Physical Geography | 0 | - | 4.60 | 35,492 |
| Countries with More Cows than People | 0 | - | 4.45 | 61,230 |
| Fish by Picture #1 | 0 | - | 4.41 | 108,474 |
| North American Bird-Named Teams | 0 | - | 4.44 | 67,825 |
| Countries with NO Snakes | 0 | - | 4.51 | 63,575 |
| African Great Lake Countries with an Empty Map | 0 | - | 4.97 | 60,701 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,123 |
| Europe Map Quiz | 0 | - | 5.00 | 4,757,505 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,430 |
| Largest Land Animals of Asia | 0 | - | 3.64 | 8,294 |
| Countries with Wild Lions | 0 | - | 4.77 | 26,270 |
| Animals A-Z by Picture | 0 | - | 4.08 | 66,368 |
| Mammals by Picture #3 | 0 | - | 4.39 | 62,069 |
| Mammals by Picture #4 | 0 | - | 4.03 | 34,096 |
| Mammals by Picture #2 | 0 | - | 4.28 | 58,186 |
| Where Do Musk Oxen Live? | 0 | - | 4.63 | 15,305 |
| Africa Map Quiz | 0 | - | 5.00 | 2,115,557 |
| Oceania Map Quiz | 0 | - | 4.98 | 641,071 |
| Australian Capitals | 0 | - | 4.92 | 62,706 |
| Territories of the United States | 0 | - | 4.79 | 52,348 |
| Five Biggest Immigrant Groups by Decade in the US | 0 | - | 4.79 | 39,601 |
| Most Mentioned Enemies of the USA | 0 | - | 4.77 | 175,317 |
| Rivers of the United States | 0 | - | 4.93 | 66,096 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 52,106 |
| Name a Valid Answer - United States #1 | 0 | - | 4.61 | 93,888 |
| New York City Geography | 0 | - | 4.42 | 33,068 |
| Canada Immigration by Country | 0 | - | 4.51 | 62,538 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,036 |
| Official European Union Languages | 0 | - | 4.97 | 238,241 |
| European Countries in their Native Language | 0 | - | 4.99 | 157,687 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 427,694 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,447,151 |
| Asia Map Quiz | 0 | - | 4.99 | 915,164 |
| Bodies of Water around the Arabian Peninsula | 0 | - | 4.74 | 36,046 |
| Extinct Animals | 0 | - | 4.16 | 27,494 |
| Reptile Picture Quiz | 0 | - | 4.32 | 14,289 |
| Earliest Domestication of Animals | 0 | - | 4.34 | 28,249 |
| Animals in the News | 0 | - | 4.37 | 26,784 |
| Top 10 Countries with the Most Horses | 0 | - | 4.49 | 68,960 |
| Megadiverse Countries | 0 | - | 4.96 | 134,790 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 46,682 |
| African East Coast | 0 | - | 4.96 | 95,885 |
| Western Africa Map Quiz | 0 | - | 4.97 | 73,697 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 50,537 |
| Islands of the Galápagos | 0 | - | 4.54 | 4,772 |
| Caribbean Countries and Territories | 0 | - | 4.80 | 112,732 |
| Native American Tribes in the US | 0 | - | 4.72 | 25,484 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 211,878 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,597 |
| Countries That Use the Euro | 0 | - | 4.95 | 104,681 |
| European Physical Geography | 0 | - | 4.26 | 33,482 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,919 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 114,945 |
| The Only European Country ... | 0 | - | 4.91 | 216,162 |
| European Countries NOT in NATO | 0 | - | 4.90 | 60,867 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,777 |
| South and Central Asia Map Quiz | 0 | - | 4.94 | 98,749 |
| Sea Creatures by Picture | 0 | - | 4.27 | 17,693 |
| Top Countries for Shark Attacks | 0 | - | 4.46 | 45,800 |
| Natural Features of Countries #1 | 0 | - | 4.87 | 83,773 |
| Countries with Fjords | 0 | - | 4.94 | 100,808 |
| Countries of Africa | 0 | - | 5.00 | 2,531,886 |
| Australia Map Quiz | 0 | - | 4.95 | 343,985 |
| Pixelated Americas Map | 0 | - | 4.39 | 47,104 |
| History of Mexico | 0 | - | 4.58 | 15,295 |
| Word Chain - South America | 0 | - | 4.51 | 23,883 |
| U.S. Federal Holidays | 0 | - | 4.33 | 99,434 |
| Top U.S. Cash Crops | 0 | - | 4.39 | 62,268 |
| Recommended Childhood Vaccines for Americans | 0 | - | 4.42 | 14,697 |
| Things Named For People #2 - U.S. Centric | 0 | - | 4.21 | 52,611 |
| Largest Asian-American Ethnic Groups | 0 | - | 4.11 | 40,974 |
| U.S. States with the Most Expensive Home Prices | 0 | - | 4.48 | 99,599 |
| U.S. States with the Cheapest Home Prices | 0 | - | 4.72 | 32,997 |
| Top 10 Most African-American U.S. States | 0 | - | 4.46 | 74,619 |
| Top 10 Most Asian U.S. States | 0 | - | 4.80 | 75,133 |
| Top 10 Most Obese U.S. States | 0 | - | 4.54 | 81,348 |
| Top 10 Least Obese U.S. States | 0 | - | 4.75 | 73,630 |
| Top 10 Least-Educated U.S. States | 0 | - | 4.43 | 90,797 |
| Top 10 Most-Educated U.S. States | 0 | - | 4.48 | 84,758 |
| U.S. States with the Highest Rates of Homelessness | 0 | - | 4.43 | 52,366 |
| Top 10 Most White U.S. States | 0 | - | 4.49 | 82,437 |
| Top 10 Most German U.S. States | 0 | - | 4.48 | 59,918 |
| Slowest Growing U.S. States Since 1960 | 0 | - | 4.43 | 46,852 |
| Canadian Geography on the Map | 0 | - | 4.55 | 26,304 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 364,120 |
| Celtic Nations | 0 | - | 4.69 | 46,915 |
| Middle East Map Quiz | 0 | - | 4.99 | 1,381,726 |
| Africa Cities Map Quiz | 0 | - | 4.97 | 98,910 |
| Flags of Africa Quiz | 0 | - | 5.00 | 469,837 |
| Top 10 Biggest African Countries by Area | 0 | - | 4.99 | 216,753 |
| 10 Southernmost Countries in Africa | 0 | - | 4.98 | 116,451 |
| 10 Northernmost Countries in Africa | 0 | - | 4.98 | 161,071 |
| Top 10 Smallest African Countries by Area | 0 | - | 4.96 | 33,142 |
| African Countries with the Shortest Names | 0 | - | 4.98 | 153,274 |
| Top African Languages on a Map | 0 | - | 4.92 | 73,782 |
| African Island Countries | 0 | - | 4.96 | 101,480 |
| Countries of Africa with an Empty Map | 0 | - | 5.00 | 243,169 |
| Oceania Physical Geography | 0 | - | 4.30 | 12,674 |
| Australian States and Territories | 0 | - | 4.96 | 141,775 |
| Australian Immigration by Country | 0 | - | 4.81 | 77,247 |
| Australian Animals By Picture | 0 | - | 4.45 | 31,576 |
| Australia True or False | 0 | - | 4.87 | 56,797 |
| Flags of North and South America | 0 | - | 4.99 | 372,280 |
| South American Physical Geography | 0 | - | 4.58 | 18,332 |
| Haiti... or Dominican Republic? | 0 | - | 4.70 | 40,703 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,096 |
| Top 10 U.S. States with the Lowest Life Expectancy | 0 | - | 4.61 | 45,100 |
| Top 10 U.S. States That Grow the Most Corn | 0 | - | 4.52 | 36,145 |
| Bahamas Country Quiz | 0 | - | 4.63 | 19,200 |
| Straight Shot to Antarctica | 0 | - | 4.94 | 42,820 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,369 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,241,142 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,326,820 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 192,490 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 151,042 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 218,310 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,039 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,288 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 310,106 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 170,926 |
| Seas of Europe | 0 | - | 4.37 | 84,598 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 68,888 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 89,084 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,847 |
| Slavic Countries | 0 | - | 4.96 | 111,534 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,306 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,913 |
| Counties of England | 0 | - | 4.97 | 795,306 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 354,917 |
| Flags of Asia Quiz | 0 | - | 4.99 | 612,033 |
| East Asia Cities Map Quiz | 0 | - | 4.96 | 110,123 |
| 10 Biggest Asian Countries by Area | 0 | - | 4.97 | 153,594 |
| 10 Southernmost Countries in Asia | 0 | - | 4.97 | 99,016 |
| 10 Easternmost Countries in Asia | 0 | - | 4.99 | 107,862 |
| Countries of Asia with Two or More Words | 0 | - | 4.96 | 126,717 |
| Asian Countries Ending in "IA" | 0 | - | 4.96 | 107,341 |
| Top Asian Languages on a Map | 0 | - | 4.95 | 71,312 |
| Countries of Asia with an Empty Map | 0 | - | 4.98 | 230,112 |
| All First-Level Subdivisions of Asia on a Map | 0 | - | 4.91 | 49,802 |
