| American Countries With No Atlantic Coastline | 0 | - | 4.94 | 92,744 |
| Countries with Wild Tigers | 0 | - | 4.96 | 137,182 |
| Countries with Wild Penguins | 0 | - | 4.94 | 100,468 |
| Countries with the Most Venomous Animal Species | 0 | - | 4.87 | 87,480 |
| Animals by Skeleton Image | 0 | - | 4.81 | 46,863 |
| United States Map Quiz | 0 | - | 4.98 | 4,169,152 |
| "Big Five" African Game Animals | 0 | - | 4.22 | 47,469 |
| 10 Biggest American Countries by Area | 0 | - | 4.95 | 112,903 |
| Top 10 Most Populous American Countries | 0 | - | 4.96 | 144,693 |
| Latin American Countries Map Quiz | 0 | - | 4.97 | 130,508 |
| South America Map Quiz | 0 | - | 5.00 | 1,555,143 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,029,857 |
| North America Map Quiz | 0 | - | 4.98 | 251,154 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,941 |
| Canada Provinces and Territories | 0 | - | 5.00 | 345,576 |
| Canada Provinces Map Quiz | 0 | - | 4.99 | 643,791 |
| Most Spoken Languages in Canada | 0 | - | 4.91 | 55,495 |
| Countries with the Most Sheep | 0 | - | 4.93 | 103,581 |
| Central America and Caribbean Map Quiz | 0 | - | 4.90 | 904,539 |
| North American Capitals - Map Quiz | 0 | - | 4.88 | 58,706 |
| Countries of North America with an Empty Map | 0 | - | 4.99 | 95,076 |
| All First-Level Subdivisions of North America on a Map | 0 | - | 4.97 | 64,838 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,814 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,692 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,860 |
| Cities and Towns of Massachusetts | 0 | - | 4.93 | 74,875 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 40,208 |
| Countries with the Most Wolves | 0 | - | 4.92 | 108,487 |
| Countries that Catch the Most Fish | 0 | - | 4.90 | 113,048 |
| Countries With Two or More Bear Species | 0 | - | 4.90 | 22,849 |
| Largest Land Animals of Africa | 0 | - | 4.36 | 12,801 |
| American Countries on the Pacific Coast | 0 | - | 4.80 | 49,361 |
| Countries of South America with an Empty Map | 0 | - | 4.94 | 105,379 |
| Central American Countries | 0 | - | 4.98 | 157,197 |
| Caribbean Countries and Territories | 0 | - | 4.81 | 113,329 |
| Caribbean / Lesser Antilles Map Quiz | 0 | - | 4.99 | 150,061 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 532,090 |
| African Great Lakes | 0 | - | 4.82 | 66,871 |
| Countries with the Most Wild Elephants | 0 | - | 4.63 | 55,132 |
| Animal Populations of Countries | 0 | - | 4.52 | 44,025 |
| North American Cat-Named Sports Teams | 0 | - | 4.43 | 33,798 |
| Animals by Close-up Image | 0 | - | 4.42 | 218,931 |
| Aquatic Mammals by Picture | 0 | - | 4.41 | 45,962 |
| Extinct Animals by Picture | 0 | - | 4.49 | 35,444 |
| Mammals by Picture #1 | 0 | - | 4.70 | 92,354 |
| Top 15 Countries with the Most Cows | 0 | - | 4.74 | 107,453 |
| Top 10 American Countries by Coastline | 0 | - | 4.96 | 88,575 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 82,990 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 160,575 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 178,126 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 125,606 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,788 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 86,597 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.85 | 67,934 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,845 |
| Asian Countries by First 2 Letters | 0 | - | 4.92 | 280,457 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 269,161 |
| Nile River Basin Countries on a Map | 0 | - | 4.95 | 50,899 |
| Name that Bug | 0 | - | 4.12 | 45,622 |
| Animals of Australia | 0 | - | 4.52 | 42,460 |
| Most-Spoken Languages of the United States | 0 | - | 4.52 | 222,079 |
| Canada Geography Trivia | 0 | - | 4.80 | 47,663 |
| Asian Physical Geography | 0 | - | 4.61 | 35,607 |
| African Physical Geography | 0 | - | 4.51 | 31,799 |
| Countries with More Cows than People | 0 | - | 4.46 | 61,604 |
| Fish by Picture #1 | 0 | - | 4.41 | 109,010 |
| North American Bird-Named Teams | 0 | - | 4.44 | 67,982 |
| Countries with NO Snakes | 0 | - | 4.51 | 63,654 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,357 |
| Europe Map Quiz | 0 | - | 5.00 | 4,783,212 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,996 |
| Largest Land Animals of Asia | 0 | - | 3.64 | 8,337 |
| African Great Lake Countries with an Empty Map | 0 | - | 4.97 | 60,925 |
| Countries with Wild Lions | 0 | - | 4.77 | 26,534 |
| Animals A-Z by Picture | 0 | - | 4.08 | 66,799 |
| Mammals by Picture #3 | 0 | - | 4.39 | 62,457 |
| Mammals by Picture #4 | 0 | - | 4.03 | 34,299 |
| Mammals by Picture #2 | 0 | - | 4.28 | 58,503 |
| Where Do Musk Oxen Live? | 0 | - | 4.63 | 15,345 |
| Oceania Map Quiz | 0 | - | 4.98 | 658,519 |
| Australian Capitals | 0 | - | 4.92 | 62,815 |
| Territories of the United States | 0 | - | 4.80 | 52,587 |
| Five Biggest Immigrant Groups by Decade in the US | 0 | - | 4.79 | 39,844 |
| Most Mentioned Enemies of the USA | 0 | - | 4.77 | 176,010 |
| Rivers of the United States | 0 | - | 4.93 | 66,588 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 52,473 |
| Name a Valid Answer - United States #1 | 0 | - | 4.62 | 94,336 |
| New York City Geography | 0 | - | 4.43 | 33,174 |
| Canada Immigration by Country | 0 | - | 4.51 | 62,832 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,627 |
| Official European Union Languages | 0 | - | 4.97 | 239,572 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,528 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 430,471 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,451,513 |
| Asia Map Quiz | 0 | - | 4.99 | 923,956 |
| Bodies of Water around the Arabian Peninsula | 0 | - | 4.74 | 36,179 |
| Africa Map Quiz | 0 | - | 5.00 | 2,127,008 |
| Extinct Animals | 0 | - | 4.16 | 27,562 |
| Reptile Picture Quiz | 0 | - | 4.32 | 14,368 |
| Earliest Domestication of Animals | 0 | - | 4.34 | 28,298 |
| Animals in the News | 0 | - | 4.37 | 26,828 |
| Top 10 Countries with the Most Horses | 0 | - | 4.49 | 69,222 |
| Megadiverse Countries | 0 | - | 4.96 | 135,210 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 51,347 |
| Australian Animals By Picture | 0 | - | 4.45 | 31,748 |
| Islands of the Galápagos | 0 | - | 4.54 | 4,791 |
| Native American Tribes in the US | 0 | - | 4.74 | 25,701 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 213,638 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,874 |
| Countries That Use the Euro | 0 | - | 4.95 | 106,485 |
| European Physical Geography | 0 | - | 4.26 | 33,585 |
| Europe Geography Decoder | 0 | - | 4.86 | 70,259 |
| 10 Easternmost Countries in Europe | 0 | - | 4.87 | 116,868 |
| The Only European Country ... | 0 | - | 4.91 | 218,590 |
| European Countries NOT in NATO | 0 | - | 4.91 | 62,301 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 42,021 |
| South and Central Asia Map Quiz | 0 | - | 4.94 | 99,797 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 47,704 |
| African East Coast | 0 | - | 4.96 | 96,639 |
| Western Africa Map Quiz | 0 | - | 4.97 | 74,486 |
| Sea Creatures by Picture | 0 | - | 4.27 | 17,804 |
| Top Countries for Shark Attacks | 0 | - | 4.47 | 45,919 |
| Natural Features of Countries #1 | 0 | - | 4.87 | 84,014 |
| Countries with Fjords | 0 | - | 4.94 | 101,247 |
| Australia Map Quiz | 0 | - | 4.95 | 345,925 |
| Pixelated Americas Map | 0 | - | 4.39 | 47,379 |
| History of Mexico | 0 | - | 4.52 | 15,358 |
| Word Chain - South America | 0 | - | 4.51 | 23,991 |
| U.S. Federal Holidays | 0 | - | 4.33 | 99,606 |
| Top U.S. Cash Crops | 0 | - | 4.39 | 62,426 |
| Recommended Childhood Vaccines for Americans | 0 | - | 4.42 | 14,765 |
| Things Named For People #2 - U.S. Centric | 0 | - | 4.21 | 52,713 |
| Largest Asian-American Ethnic Groups | 0 | - | 4.12 | 41,150 |
| U.S. States with the Most Expensive Home Prices | 0 | - | 4.48 | 99,892 |
| U.S. States with the Cheapest Home Prices | 0 | - | 4.74 | 33,196 |
| Top 10 Most African-American U.S. States | 0 | - | 4.46 | 74,811 |
| Top 10 Most Asian U.S. States | 0 | - | 4.80 | 75,420 |
| Top 10 Most Obese U.S. States | 0 | - | 4.54 | 81,495 |
| Top 10 Least Obese U.S. States | 0 | - | 4.75 | 73,832 |
| Top 10 Least-Educated U.S. States | 0 | - | 4.43 | 91,299 |
| Top 10 Most-Educated U.S. States | 0 | - | 4.48 | 85,217 |
| U.S. States with the Highest Rates of Homelessness | 0 | - | 4.43 | 52,555 |
| Top 10 Most White U.S. States | 0 | - | 4.49 | 82,987 |
| Top 10 Most German U.S. States | 0 | - | 4.48 | 60,223 |
| Slowest Growing U.S. States Since 1960 | 0 | - | 4.43 | 47,061 |
| Canadian Geography on the Map | 0 | - | 4.55 | 26,413 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 365,934 |
| Celtic Nations | 0 | - | 4.61 | 47,075 |
| Middle East Map Quiz | 0 | - | 4.99 | 1,386,661 |
| Countries of Africa | 0 | - | 5.00 | 2,555,472 |
| Oceania Physical Geography | 0 | - | 4.30 | 12,720 |
| Australian States and Territories | 0 | - | 4.96 | 142,724 |
| Australian Immigration by Country | 0 | - | 4.81 | 77,467 |
| Australia True or False | 0 | - | 4.87 | 57,101 |
| Flags of North and South America | 0 | - | 4.99 | 376,271 |
| South American Physical Geography | 0 | - | 4.58 | 18,396 |
| Uruguay Country Quiz | 0 | - | 4.84 | 31,732 |
| Haiti... or Dominican Republic? | 0 | - | 4.70 | 40,827 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,183 |
| Top 10 U.S. States with the Lowest Life Expectancy | 0 | - | 4.61 | 45,246 |
| Top 10 U.S. States That Grow the Most Corn | 0 | - | 4.52 | 36,252 |
| Bahamas Country Quiz | 0 | - | 4.63 | 19,277 |
| Straight Shot to Antarctica | 0 | - | 4.94 | 43,125 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,484 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,255,299 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,334,432 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 193,370 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 151,918 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 220,435 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,675 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.83 | 87,943 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 312,415 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 175,288 |
| Seas of Europe | 0 | - | 4.37 | 84,867 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 70,192 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 90,031 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,689 |
| Slavic Countries | 0 | - | 4.96 | 112,258 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,656 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,384 |
| Counties of England | 0 | - | 4.97 | 801,927 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 360,738 |
| Flags of Asia Quiz | 0 | - | 4.99 | 618,931 |
| East Asia Cities Map Quiz | 0 | - | 4.96 | 110,688 |
| 10 Biggest Asian Countries by Area | 0 | - | 4.97 | 154,430 |
| 10 Southernmost Countries in Asia | 0 | - | 4.97 | 99,795 |
| 10 Easternmost Countries in Asia | 0 | - | 4.99 | 109,053 |
| Countries of Asia with Two or More Words | 0 | - | 4.96 | 127,670 |
| Asian Countries Ending in "IA" | 0 | - | 4.96 | 108,201 |
| Top Asian Languages on a Map | 0 | - | 4.95 | 71,966 |
| Countries of Asia with an Empty Map | 0 | - | 4.98 | 231,392 |
| All First-Level Subdivisions of Asia on a Map | 0 | - | 4.91 | 50,487 |
| Countries of the Middle East | 0 | - | 4.96 | 202,403 |
| Countries where Arabic is an Official Language | 0 | - | 4.85 | 72,704 |
| Africa Cities Map Quiz | 0 | - | 4.97 | 99,447 |
| Flags of Africa Quiz | 0 | - | 5.00 | 476,429 |
| Top 10 Biggest African Countries by Area | 0 | - | 4.99 | 218,181 |
| 10 Southernmost Countries in Africa | 0 | - | 4.98 | 117,367 |
| 10 Northernmost Countries in Africa | 0 | - | 4.98 | 162,162 |
| Top 10 Smallest African Countries by Area | 0 | - | 4.96 | 34,027 |
