| All First-Level Subdivisions of South America on a Map | 0 | - | 4.91 | 50,627 |
| States of Brazil | 0 | - | 4.98 | 83,257 |
| States of Mexico | 0 | - | 4.95 | 167,271 |
| Brazil States Map Quiz | 0 | - | 4.85 | 46,092 |
| Colombia Country Quiz | 0 | - | 4.90 | 39,557 |
| South American Geography Quiz #2 | 0 | - | 4.68 | 38,849 |
| South American Geography Quiz #1 | 0 | - | 4.74 | 32,197 |
| Argentina Country Quiz | 0 | - | 4.53 | 56,317 |
| Countries Bordering Brazil | 0 | - | 4.96 | 129,708 |
| Countries That Visit Brazil The Most | 0 | - | 4.95 | 48,710 |
| Famous Mexicans and Mexican-Americans | 0 | - | 4.13 | 16,833 |
| Flags of North and South America | 0 | - | 4.99 | 348,984 |
| South American Physical Geography | 0 | - | 4.58 | 18,121 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.84 | 85,821 |
| South America Capitals Quiz | 0 | - | 5.00 | 469,774 |
| Famous Germans | 0 | - | 4.49 | 53,159 |
| Famous Italians by Clue | 0 | - | 4.45 | 86,749 |
| The Only American Country ... | 0 | - | 4.92 | 118,513 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 118,841 |
| Uruguay Country Quiz | 0 | - | 4.83 | 30,937 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 235,790 |
| US States Quiz | 0 | - | 5.00 | 16,389,557 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 361,784 |
| Canada A-Z | 0 | - | 4.70 | 32,324 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 65,279 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.93 | 89,915 |
| U.S. Geography by Letter - B | 0 | - | 4.54 | 66,978 |
| U.S. Geography by Letter - S | 0 | - | 4.54 | 50,903 |
| Hispanic Last Names in the U.S. | 0 | - | 4.30 | 54,357 |
| Mexico States Map Quiz | 0 | - | 4.84 | 101,497 |
| Countries of South America with an Empty Map | 0 | - | 4.94 | 102,881 |
| Brazil Country Quiz | 0 | - | 4.52 | 99,797 |
| Brazil Cities Map Quiz | 0 | - | 4.62 | 35,992 |
| Chile Country Quiz | 0 | - | 4.74 | 39,084 |
| Peru Country Quiz | 0 | - | 4.53 | 47,550 |
| U.S. National Parks Quiz | 0 | - | 4.83 | 53,424 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.18 | 735,715 |
| Total United States Immigration by Country | 0 | - | 4.90 | 108,251 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 170,833 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 233,781 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.96 | 320,634 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 71,752 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.84 | 63,941 |
| Famous Australians | 0 | - | 4.25 | 19,924 |
| Top 10 American Countries by Coastline | 0 | - | 4.96 | 87,551 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.90 | 75,172 |
| South American Capitals - Map Quiz | 0 | - | 4.98 | 127,131 |
| Which South American Country? | 0 | - | 4.69 | 51,291 |
| 10 Longest Rivers in the United States | 0 | - | 4.84 | 38,205 |
| Pixelated United States Map | 0 | - | 4.90 | 91,772 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 105,876 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 88,911 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 143,423 |
| Countries that Beat the United States | 0 | - | 4.93 | 162,468 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 186,762 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 114,866 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 108,369 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 110,465 |
| U.S. States with Short Names | 0 | - | 4.91 | 145,274 |
| U.S. States that Start with M | 0 | - | 4.93 | 183,491 |
| U.S. States By Population | 0 | - | 4.90 | 139,750 |
| U.S. States that Start with N | 0 | - | 4.95 | 167,991 |
| U.S. States with Longest Names | 0 | - | 4.84 | 42,723 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 45,764 |
| US States with an Empty Map | 0 | - | 5.00 | 609,349 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 62,864 |
| The Only Remaining U.S. State . . . | 0 | - | 4.92 | 63,610 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 99,114 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 80,458 |
| Countries Closest to Canada | 0 | - | 4.90 | 195,462 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,079 |
| U.S. States or European Countries by Area | 0 | - | 4.94 | 91,866 |
| U.S. States or European Countries by Population | 0 | - | 4.98 | 129,183 |
| Famous Swiss and Austrian People | 0 | - | 4.43 | 14,423 |
| Famous Dutch and Belgian People | 0 | - | 4.54 | 17,769 |
| Africa A-Z | 0 | - | 4.57 | 45,949 |
| U.S. Geography by Letter - C | 0 | - | 4.26 | 72,067 |
| U.S. Geography by Letter - A | 0 | - | 4.36 | 60,902 |
| U.S. Geography by Letter - D | 0 | - | 4.08 | 54,946 |
| U.S. Geography by Letter - T | 0 | - | 4.27 | 47,868 |
| U.S. Geography by Letter - P | 0 | - | 4.34 | 46,087 |
| U.S. Geography by Letter - M | 0 | - | 4.20 | 45,071 |
| U.S. Geography by Letter - G | 0 | - | 4.11 | 37,306 |
| U.S. Geography By Letter - H | 0 | - | 4.37 | 37,750 |
| Guyana Country Quiz | 0 | - | 4.48 | 22,217 |
| Countries that Beat Brazil | 0 | - | 4.49 | 66,669 |
| Ecuador Country Quiz | 0 | - | 4.59 | 28,145 |
| Venezuela Country Quiz | 0 | - | 4.50 | 29,934 |
| Paraguay Country Quiz | 0 | - | 4.52 | 24,686 |
| Bolivia Country Quiz | 0 | - | 4.62 | 25,632 |
| Suriname Country Quiz | 0 | - | 4.60 | 19,356 |
| American Legal Vocabulary | 0 | - | 4.40 | 33,516 |
| People on Money - United States | 0 | - | 4.30 | 63,012 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 203,446 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 121,689 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 122,658 |
| Top 10 Most Native American U.S. States | 0 | - | 4.86 | 89,073 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 60,818 |
| European Countries by First 2 Letters | 0 | - | 4.96 | 520,255 |
| Famous Russians Quiz | 0 | - | 4.16 | 23,548 |
| Famous French People | 0 | - | 4.14 | 25,105 |
| Famous Irish People | 0 | - | 4.05 | 45,563 |
| Famous Nordic People | 0 | - | 4.36 | 13,394 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,424 |
| Famous Chinese People | 0 | - | 4.09 | 11,661 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 263,623 |
| Mexican Foods | 0 | - | 4.07 | 14,444 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 50,828 |
| European Geography By Letter - A | 0 | - | 4.56 | 131,142 |
| European Geography By Letter - B #1 | 0 | - | 4.70 | 109,606 |
| European Geography By Letter - C | 0 | - | 4.46 | 110,739 |
| European Geography By Letter - D | 0 | - | 4.51 | 105,450 |
| European Geography By Letter - L | 0 | - | 4.51 | 110,778 |
| European Geography By Letter - M | 0 | - | 4.52 | 126,587 |
| European Geography By Letter - P #1 | 0 | - | 4.78 | 95,114 |
| European Geography By Letter - N | 0 | - | 4.44 | 98,692 |
| European Geography By Letter - R | 0 | - | 4.41 | 91,640 |
| European Geography By Letter - V | 0 | - | 4.43 | 91,139 |
| European Geography By Letter - T | 0 | - | 4.41 | 79,691 |
| Europe Map Quiz | 0 | - | 5.00 | 4,670,358 |
| European Geography By Letter - S #1 | 0 | - | 4.61 | 98,436 |
| Famous Scottish People | 0 | - | 4.20 | 18,190 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 70,326 |
| Asian Geography by Letter - H | 0 | - | 4.48 | 64,849 |
| Asian Geography By Letter - M | 0 | - | 4.47 | 60,757 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 57,067 |
| Asian Geography by Letter - T | 0 | - | 4.50 | 56,617 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 273,883 |
| Middle East A-Z | 0 | - | 4.46 | 45,334 |
| 100 Most Common English Words | 0 | - | 4.89 | 1,282,073 |
| Africa Map Quiz | 0 | - | 5.00 | 2,081,218 |
| Oceania Map Quiz | 0 | - | 4.98 | 622,660 |
| Australian Capitals | 0 | - | 4.92 | 62,341 |
| U.S. Geography by Letter - N | 0 | - | 3.77 | 44,351 |
| U.S. Geography by Letter - E | 0 | - | 3.73 | 47,156 |
| U.S. Geography by Letter - F | 0 | - | 3.85 | 43,412 |
| U.S. Geography by Letter - O | 0 | - | 3.41 | 32,829 |
| U.S. Geography by Letter - L | 0 | - | 4.00 | 33,490 |
| U.S. Geography by Letter - R | 0 | - | 4.14 | 29,149 |
| Islands of the Galápagos | 0 | - | 4.54 | 4,722 |
| South American Cities on the Map | 0 | - | 4.57 | 34,941 |
| Largest Virgin Islands | 0 | - | 4.24 | 5,228 |
| U.S. State Nicknames Quiz | 0 | - | 4.50 | 49,625 |
| Countries with American Expatriates | 0 | - | 4.55 | 42,244 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 39,846 |
| United States Country Quiz | 0 | - | 4.44 | 98,785 |
| Busiest Air Routes from the U.S. | 0 | - | 4.47 | 76,086 |
| Canada Country Quiz | 0 | - | 4.53 | 129,972 |
| Canada Cities Map Quiz | 0 | - | 4.63 | 122,535 |
| Count to 10 in Europe: Pro | 0 | - | 4.85 | 67,490 |
| Official European Union Languages | 0 | - | 4.98 | 233,616 |
| European Countries in their Native Language | 0 | - | 4.99 | 154,806 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 419,473 |
| United Kingdom A-Z | 0 | - | 4.53 | 86,410 |
| Asian Cities A-Z | 0 | - | 4.51 | 31,265 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,425,598 |
| Asia Map Quiz | 0 | - | 4.99 | 888,150 |
| Most Guessed Cities in Asia - Not Capitals | 0 | - | 4.41 | 28,602 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.74 | 59,012 |
| A Quiz About Islam | 0 | - | 4.30 | 47,689 |
| Countries That Don't Recognize Israel | 0 | - | 4.61 | 33,668 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 153,262 |
| Countries of Africa | 0 | - | 5.00 | 2,451,968 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 43,853 |
| African East Coast | 0 | - | 4.96 | 93,314 |
| Western Africa Map Quiz | 0 | - | 4.97 | 71,238 |
| Canada or Africa by Area | 0 | - | 4.75 | 17,488 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 48,262 |
| Australia Map Quiz | 0 | - | 4.94 | 339,087 |
| Mexico Country Quiz | 0 | - | 4.49 | 71,062 |
| Mexico Cities Map Quiz | 0 | - | 4.77 | 32,941 |
| History of Mexico | 0 | - | 4.58 | 15,079 |
| Paraguay... or Uruguay? | 0 | - | 4.55 | 26,419 |
| Cuba Country Quiz | 0 | - | 4.70 | 50,506 |
| Haiti... or Dominican Republic? | 0 | - | 4.69 | 40,304 |
| Jamaica Country Quiz | 0 | - | 4.58 | 34,458 |
| Haiti Country Quiz | 0 | - | 4.77 | 31,882 |
| U.S. Federal Holidays | 0 | - | 4.33 | 98,654 |
| Top U.S. Universities | 0 | - | 4.15 | 141,429 |
| Largest United States Airlines | 0 | - | 4.39 | 54,366 |
| United States Map Quiz | 0 | - | 4.98 | 4,113,002 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,258 |
| U.S. States by Governor | 0 | - | 4.43 | 17,800 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,345 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.42 | 58,966 |
| 10 Closest Megacities to New York City | 0 | - | 4.52 | 66,827 |
| New England States | 0 | - | 4.51 | 59,485 |
| U.S. License Plates Picture Quiz | 0 | - | 4.58 | 52,067 |
| U.S. States with the Fewest Immigrants | 0 | - | 4.63 | 64,600 |
| U.S. States by Land Area | 0 | - | 4.62 | 51,775 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 37,683 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.80 | 64,782 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.74 | 54,726 |
| Add a Letter - Make a U.S. State | 0 | - | 4.70 | 81,476 |
| U.S. States by Borders | 0 | - | 4.62 | 34,668 |
| 10 Easternmost U.S. States | 0 | - | 4.53 | 55,744 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 100,407 |
| U.S. States with the Longest International Borders | 0 | - | 4.78 | 45,182 |
| Longest U.S. State Borders | 0 | - | 4.63 | 38,550 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.47 | 43,407 |
