| States of Brazil | 0 | - | 4.97 | 88,817 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.92 | 54,276 |
| Brazil States Map Quiz | 0 | - | 4.86 | 48,307 |
| Countries Bordering Brazil | 0 | - | 4.96 | 131,981 |
| States of Mexico | 0 | - | 4.96 | 177,074 |
| Colombia Country Quiz | 0 | - | 4.90 | 40,838 |
| South American Geography Quiz #1 | 0 | - | 4.62 | 32,717 |
| Brazil Country Quiz | 0 | - | 4.52 | 102,055 |
| Countries That Visit Brazil The Most | 0 | - | 4.95 | 49,709 |
| South America A-Z | 0 | - | 4.13 | 10,928 |
| Flags of North and South America | 0 | - | 4.99 | 374,783 |
| South American Physical Geography | 0 | - | 4.58 | 18,377 |
| Uruguay Country Quiz | 0 | - | 4.84 | 31,654 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,706 |
| South America Capitals Quiz | 0 | - | 5.00 | 483,065 |
| South American Geography Quiz #2 | 0 | - | 4.37 | 42,040 |
| Famous Germans | 0 | - | 4.50 | 55,565 |
| Famous Italians by Clue | 0 | - | 4.45 | 89,897 |
| The Only American Country ... | 0 | - | 4.92 | 121,882 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 121,345 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,825 |
| US States Quiz | 0 | - | 5.00 | 16,931,662 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 367,923 |
| Canada A-Z | 0 | - | 4.73 | 32,906 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 98,188 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 66,764 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 92,461 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 69,739 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 53,198 |
| Hispanic Last Names in the U.S. | 0 | - | 4.31 | 54,805 |
| Famous Mexicans and Mexican-Americans | 0 | - | 4.15 | 16,953 |
| Mexico States Map Quiz | 0 | - | 4.84 | 105,269 |
| Countries of South America with an Empty Map | 0 | - | 4.94 | 105,178 |
| Argentina Country Quiz | 0 | - | 4.53 | 57,632 |
| Brazil Cities Map Quiz | 0 | - | 4.62 | 36,739 |
| Chile Country Quiz | 0 | - | 4.75 | 40,149 |
| Ecuador Country Quiz | 0 | - | 4.60 | 31,926 |
| Peru Country Quiz | 0 | - | 4.54 | 48,790 |
| Name the U.S. National Parks | 0 | - | 4.86 | 60,173 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 748,324 |
| Total United States Immigration by Country | 0 | - | 4.91 | 111,963 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 174,982 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 245,114 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 333,589 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,968 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,463 |
| Famous French People | 0 | - | 4.07 | 35,910 |
| Famous Australians by Description | 0 | - | 4.23 | 28,026 |
| Top 10 American Countries by Coastline | 0 | - | 4.96 | 88,491 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.93 | 84,602 |
| Mexico Cities Map Quiz | 0 | - | 4.83 | 38,717 |
| South American Capitals - Map Quiz | 0 | - | 4.98 | 130,885 |
| Which South American Country? | 0 | - | 4.69 | 52,024 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,264 |
| Pixelated United States Map | 0 | - | 4.88 | 94,516 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 110,042 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 92,068 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 146,778 |
| Countries that Beat the United States | 0 | - | 4.93 | 167,941 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,345 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 118,183 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 111,796 |
| 10 Southernmost U.S. States | 0 | - | 4.89 | 113,730 |
| U.S. States with Short Names | 0 | - | 4.91 | 149,425 |
| U.S. States that Start with M | 0 | - | 4.93 | 187,745 |
| U.S. States By Population | 0 | - | 4.92 | 153,810 |
| U.S. States that Start with N | 0 | - | 4.95 | 171,802 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,633 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 48,909 |
| US States with an Empty Map | 0 | - | 5.00 | 626,422 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,357 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 65,836 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 102,003 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,645 |
| Most-Visited Countries by Canadians | 0 | - | 4.83 | 39,481 |
| Countries Closest to Canada | 0 | - | 4.91 | 198,680 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,665 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 96,491 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 133,619 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 18,098 |
| U.S. Geography by Letter - C | 0 | - | 4.27 | 74,345 |
| U.S. Geography by Letter - A | 0 | - | 4.37 | 63,368 |
| U.S. Geography by Letter - D | 0 | - | 4.09 | 57,326 |
| U.S. Geography by Letter - T | 0 | - | 4.29 | 50,065 |
| U.S. Geography by Letter - P | 0 | - | 4.38 | 54,213 |
| U.S. Geography by Letter - M | 0 | - | 4.14 | 53,530 |
| U.S. Geography by Letter - L | 0 | - | 4.04 | 41,377 |
| U.S. Geography by Letter - G | 0 | - | 4.13 | 39,539 |
| U.S. Geography by Letter - R | 0 | - | 4.22 | 36,251 |
| U.S. Geography By Letter - H | 0 | - | 4.35 | 40,421 |
| Guyana Country Quiz | 0 | - | 4.50 | 22,857 |
| Countries that Beat Brazil | 0 | - | 4.49 | 68,889 |
| Venezuela Country Quiz | 0 | - | 4.51 | 30,661 |
| Paraguay Country Quiz | 0 | - | 4.54 | 25,346 |
| Bolivia Country Quiz | 0 | - | 4.63 | 26,315 |
| Suriname Country Quiz | 0 | - | 4.61 | 19,863 |
| American Legal Vocabulary | 0 | - | 4.40 | 33,967 |
| People on Money - United States | 0 | - | 4.31 | 63,383 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 209,621 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 125,393 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 126,042 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 92,410 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 62,048 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 530,913 |
| Famous Russians | 0 | - | 4.16 | 23,880 |
| Famous Irish People | 0 | - | 4.05 | 46,029 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,625 |
| Asian Cities A-Z by Clue | 0 | - | 4.51 | 42,599 |
| Famous Chinese People | 0 | - | 4.09 | 11,893 |
| Africa A-Z | 0 | - | 4.57 | 46,702 |
| Belize Country Quiz | 0 | - | 4.85 | 21,024 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 52,320 |
| Midwestern States of the U.S. | 0 | - | 4.88 | 13,952 |
| European Geography By Letter - A | 0 | - | 4.52 | 147,090 |
| European Geography By Letter - B #1 | 0 | - | 4.69 | 120,490 |
| European Geography By Letter - C | 0 | - | 4.46 | 114,880 |
| European Geography By Letter - D | 0 | - | 4.50 | 109,431 |
| European Geography By Letter - L | 0 | - | 4.52 | 114,099 |
| European Geography By Letter - M | 0 | - | 4.67 | 131,469 |
| European Geography By Letter - N | 0 | - | 4.44 | 101,279 |
| European Geography By Letter - R | 0 | - | 4.42 | 94,096 |
| European Geography By Letter - V | 0 | - | 4.42 | 93,347 |
| European Geography By Letter - T | 0 | - | 4.41 | 82,933 |
| Europe Map Quiz | 0 | - | 5.00 | 4,774,147 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 100,961 |
| Famous Scottish People | 0 | - | 4.22 | 18,418 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 71,298 |
| Asian Geography by Letter - H | 0 | - | 4.50 | 65,872 |
| Asian Geography By Letter - M | 0 | - | 4.48 | 61,524 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 58,035 |
| Asian Geography by Letter - T | 0 | - | 4.51 | 57,497 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 279,854 |
| Asian Geography By Letter - L | 0 | - | 4.49 | 43,156 |
| Asian Geography By Letter - O | 0 | - | 4.66 | 32,075 |
| Middle East A-Z | 0 | - | 4.47 | 46,170 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 268,739 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,320,853 |
| Oceania Map Quiz | 0 | - | 4.98 | 655,608 |
| Australian Capitals | 0 | - | 4.92 | 62,774 |
| U.S. Geography by Letter - N | 0 | - | 3.80 | 52,974 |
| U.S. Geography by Letter - E | 0 | - | 3.75 | 48,965 |
| U.S. Geography by Letter - F | 0 | - | 3.84 | 45,231 |
| U.S. Geography by Letter - O | 0 | - | 3.52 | 41,709 |
| Islands of the Galápagos | 0 | - | 4.54 | 4,785 |
| South American Cities on the Map | 0 | - | 4.53 | 35,480 |
| Largest Virgin Islands | 0 | - | 4.24 | 5,306 |
| U.S. State Nicknames | 0 | - | 4.47 | 50,624 |
| Countries with American Expatriates | 0 | - | 4.53 | 42,622 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 40,222 |
| United States Country Quiz | 0 | - | 4.43 | 101,809 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 76,981 |
| Canada Country Quiz | 0 | - | 4.54 | 132,737 |
| Canada Cities Map Quiz | 0 | - | 4.64 | 124,406 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,393 |
| Official European Union Languages | 0 | - | 4.97 | 239,065 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,227 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 429,461 |
| United Kingdom A-Z | 0 | - | 4.52 | 88,203 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,450,038 |
| Asia Map Quiz | 0 | - | 4.99 | 920,516 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 60,088 |
| A Quiz About Islam | 0 | - | 4.31 | 48,521 |
| Countries That Don't Recognize Israel | 0 | - | 4.68 | 34,989 |
| Africa Map Quiz | 0 | - | 5.00 | 2,122,898 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 157,814 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 51,029 |
| Australia Map Quiz | 0 | - | 4.95 | 345,376 |
| Mexico Country Quiz | 0 | - | 4.49 | 72,566 |
| History of Mexico | 0 | - | 4.58 | 15,341 |
| Paraguay... or Uruguay? | 0 | - | 4.55 | 26,739 |
| Costa Rica Country Quiz | 0 | - | 4.75 | 32,255 |
| Cuba Country Quiz | 0 | - | 4.70 | 51,609 |
| Haiti... or Dominican Republic? | 0 | - | 4.70 | 40,781 |
| Jamaica Country Quiz | 0 | - | 4.58 | 35,172 |
| Haiti Country Quiz | 0 | - | 4.79 | 32,692 |
| U.S. Federal Holidays | 0 | - | 4.33 | 99,536 |
| Top U.S. Universities | 0 | - | 4.15 | 145,447 |
| Largest United States Airlines | 0 | - | 4.39 | 55,090 |
| United States Map Quiz | 0 | - | 4.98 | 4,164,692 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 209,956 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 80,053 |
| U.S. States by Governor | 0 | - | 4.43 | 18,084 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,722 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,719 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.43 | 59,979 |
| 10 Closest Megacities to New York City | 0 | - | 4.52 | 67,426 |
| Events in U.S. History | 0 | - | 4.41 | 28,731 |
| New England States | 0 | - | 4.51 | 59,849 |
| U.S. License Plates Picture Quiz | 0 | - | 4.61 | 53,012 |
| U.S. States with the Fewest Immigrants | 0 | - | 4.63 | 65,921 |
| U.S. States by Land Area | 0 | - | 4.63 | 52,922 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 38,049 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.80 | 65,550 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.74 | 55,258 |
| Add a Letter - Make a U.S. State | 0 | - | 4.70 | 82,951 |
| U.S. States by Borders | 0 | - | 4.61 | 35,395 |
| 10 Easternmost U.S. States | 0 | - | 4.53 | 56,567 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 102,178 |
| U.S. States with the Longest International Borders | 0 | - | 4.78 | 45,867 |
| Longest U.S. State Borders | 0 | - | 4.67 | 39,978 |
