| States of Brazil | 0 | - | 4.98 | 86,788 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.92 | 53,221 |
| Brazil States Map Quiz | 0 | - | 4.85 | 47,550 |
| Countries Bordering Brazil | 0 | - | 4.96 | 131,211 |
| States of Mexico | 0 | - | 4.95 | 174,045 |
| Colombia Country Quiz | 0 | - | 4.90 | 40,436 |
| South American Geography Quiz #2 | 0 | - | 4.61 | 39,232 |
| South American Geography Quiz #1 | 0 | - | 4.73 | 32,501 |
| Brazil Country Quiz | 0 | - | 4.52 | 101,271 |
| Countries That Visit Brazil The Most | 0 | - | 4.95 | 49,357 |
| South America A-Z | 0 | - | 4.13 | 10,853 |
| Flags of North and South America | 0 | - | 4.99 | 368,950 |
| South American Physical Geography | 0 | - | 4.58 | 18,292 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 86,986 |
| South America Capitals Quiz | 0 | - | 5.00 | 478,367 |
| Famous Germans | 0 | - | 4.50 | 54,746 |
| Famous Italians by Clue | 0 | - | 4.45 | 88,736 |
| The Only American Country ... | 0 | - | 4.92 | 121,008 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 120,501 |
| Uruguay Country Quiz | 0 | - | 4.83 | 31,409 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,582 |
| US States Quiz | 0 | - | 5.00 | 16,744,798 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 365,748 |
| Canada A-Z | 0 | - | 4.73 | 32,696 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,526 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 66,120 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.93 | 91,274 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 68,908 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 52,395 |
| Hispanic Last Names in the U.S. | 0 | - | 4.31 | 54,647 |
| Famous Mexicans and Mexican-Americans | 0 | - | 4.15 | 16,915 |
| Mexico States Map Quiz | 0 | - | 4.84 | 104,033 |
| Countries of South America with an Empty Map | 0 | - | 4.94 | 104,374 |
| Argentina Country Quiz | 0 | - | 4.53 | 57,205 |
| Brazil Cities Map Quiz | 0 | - | 4.62 | 36,423 |
| Chile Country Quiz | 0 | - | 4.75 | 39,822 |
| Ecuador Country Quiz | 0 | - | 4.60 | 31,682 |
| Peru Country Quiz | 0 | - | 4.54 | 48,411 |
| Name the U.S. National Parks | 0 | - | 4.86 | 59,416 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 744,240 |
| Total United States Immigration by Country | 0 | - | 4.91 | 110,854 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 173,502 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 241,647 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 329,045 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,607 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.84 | 65,790 |
| Famous Australians by Description | 0 | - | 4.23 | 27,723 |
| Top 10 American Countries by Coastline | 0 | - | 4.96 | 88,141 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.92 | 80,266 |
| South American Capitals - Map Quiz | 0 | - | 4.98 | 129,727 |
| Which South American Country? | 0 | - | 4.69 | 51,776 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 38,883 |
| Pixelated United States Map | 0 | - | 4.89 | 93,675 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 108,767 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 91,072 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 145,647 |
| Countries that Beat the United States | 0 | - | 4.93 | 165,896 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,546 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 117,055 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 110,681 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 112,699 |
| U.S. States with Short Names | 0 | - | 4.91 | 148,061 |
| U.S. States that Start with M | 0 | - | 4.93 | 186,288 |
| U.S. States By Population | 0 | - | 4.92 | 152,615 |
| U.S. States that Start with N | 0 | - | 4.95 | 170,689 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,033 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 47,889 |
| US States with an Empty Map | 0 | - | 5.00 | 620,257 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 63,884 |
| The Only Remaining U.S. State . . . | 0 | - | 4.92 | 65,095 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,248 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,072 |
| Countries Closest to Canada | 0 | - | 4.90 | 197,554 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,485 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 95,055 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 132,268 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 17,984 |
| Africa A-Z | 0 | - | 4.57 | 46,434 |
| U.S. Geography by Letter - C | 0 | - | 4.27 | 73,681 |
| U.S. Geography by Letter - A | 0 | - | 4.38 | 62,636 |
| U.S. Geography by Letter - D | 0 | - | 4.08 | 56,620 |
| U.S. Geography by Letter - T | 0 | - | 4.29 | 49,302 |
| U.S. Geography by Letter - P | 0 | - | 4.36 | 47,735 |
| U.S. Geography by Letter - M | 0 | - | 4.14 | 52,903 |
| U.S. Geography by Letter - L | 0 | - | 4.04 | 40,736 |
| U.S. Geography by Letter - G | 0 | - | 4.13 | 38,866 |
| U.S. Geography By Letter - H | 0 | - | 4.35 | 39,647 |
| Guyana Country Quiz | 0 | - | 4.49 | 22,658 |
| Countries that Beat Brazil | 0 | - | 4.49 | 68,072 |
| Venezuela Country Quiz | 0 | - | 4.50 | 30,469 |
| Paraguay Country Quiz | 0 | - | 4.53 | 25,153 |
| Bolivia Country Quiz | 0 | - | 4.63 | 26,121 |
| Suriname Country Quiz | 0 | - | 4.60 | 19,704 |
| American Legal Vocabulary | 0 | - | 4.40 | 33,817 |
| People on Money - United States | 0 | - | 4.31 | 63,235 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 207,223 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 124,082 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 124,914 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 91,329 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,638 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 527,030 |
| Famous Russians | 0 | - | 4.16 | 23,753 |
| Famous French People | 0 | - | 4.12 | 28,077 |
| Famous Irish People | 0 | - | 4.05 | 45,885 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,557 |
| Asian Cities A-Z by Clue | 0 | - | 4.51 | 34,897 |
| Famous Chinese People | 0 | - | 4.09 | 11,822 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 266,868 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 51,858 |
| European Geography By Letter - A | 0 | - | 4.61 | 132,589 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 111,051 |
| European Geography By Letter - C | 0 | - | 4.46 | 112,016 |
| European Geography By Letter - D | 0 | - | 4.50 | 106,896 |
| European Geography By Letter - L | 0 | - | 4.52 | 112,368 |
| European Geography By Letter - M | 0 | - | 4.64 | 129,158 |
| European Geography By Letter - N | 0 | - | 4.44 | 99,968 |
| European Geography By Letter - R | 0 | - | 4.42 | 92,741 |
| European Geography By Letter - V | 0 | - | 4.43 | 92,116 |
| European Geography By Letter - T | 0 | - | 4.41 | 81,477 |
| Europe Map Quiz | 0 | - | 5.00 | 4,739,511 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 99,718 |
| Famous Scottish People | 0 | - | 4.22 | 18,343 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 70,898 |
| Asian Geography by Letter - H | 0 | - | 4.49 | 65,472 |
| Asian Geography By Letter - M | 0 | - | 4.47 | 61,225 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 57,648 |
| Asian Geography by Letter - T | 0 | - | 4.50 | 57,145 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 277,823 |
| Asian Geography By Letter - L | 0 | - | 4.49 | 42,785 |
| Middle East A-Z | 0 | - | 4.47 | 45,868 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,307,862 |
| Africa Map Quiz | 0 | - | 5.00 | 2,107,716 |
| Oceania Map Quiz | 0 | - | 4.98 | 637,025 |
| Australian Capitals | 0 | - | 4.92 | 62,616 |
| U.S. Geography by Letter - N | 0 | - | 3.79 | 52,440 |
| U.S. Geography by Letter - E | 0 | - | 3.75 | 48,440 |
| U.S. Geography by Letter - F | 0 | - | 3.87 | 44,699 |
| U.S. Geography by Letter - O | 0 | - | 3.52 | 40,926 |
| U.S. Geography by Letter - R | 0 | - | 4.18 | 30,548 |
| Islands of the Galápagos | 0 | - | 4.54 | 4,758 |
| South American Cities on the Map | 0 | - | 4.56 | 35,277 |
| Largest Virgin Islands | 0 | - | 4.24 | 5,282 |
| U.S. State Nicknames Quiz | 0 | - | 4.47 | 50,344 |
| Countries with American Expatriates | 0 | - | 4.53 | 42,499 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 40,106 |
| United States Country Quiz | 0 | - | 4.43 | 100,827 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 76,682 |
| Canada Country Quiz | 0 | - | 4.55 | 131,919 |
| Canada Cities Map Quiz | 0 | - | 4.63 | 123,756 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 68,743 |
| Official European Union Languages | 0 | - | 4.97 | 237,319 |
| European Countries in their Native Language | 0 | - | 4.99 | 157,129 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 425,932 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,355 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,442,693 |
| Asia Map Quiz | 0 | - | 4.99 | 909,002 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 59,731 |
| A Quiz About Islam | 0 | - | 4.31 | 48,265 |
| Countries That Don't Recognize Israel | 0 | - | 4.63 | 34,545 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 156,118 |
| Countries of Africa | 0 | - | 5.00 | 2,515,115 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 46,048 |
| African East Coast | 0 | - | 4.96 | 95,306 |
| Western Africa Map Quiz | 0 | - | 4.97 | 73,193 |
| Canada or Africa by Area | 0 | - | 4.77 | 18,134 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 50,050 |
| Australia Map Quiz | 0 | - | 4.94 | 342,913 |
| Mexico Country Quiz | 0 | - | 4.49 | 72,096 |
| Mexico Cities Map Quiz | 0 | - | 4.77 | 33,340 |
| History of Mexico | 0 | - | 4.58 | 15,245 |
| Paraguay... or Uruguay? | 0 | - | 4.55 | 26,619 |
| Cuba Country Quiz | 0 | - | 4.69 | 51,266 |
| Haiti... or Dominican Republic? | 0 | - | 4.70 | 40,615 |
| Jamaica Country Quiz | 0 | - | 4.58 | 34,914 |
| Haiti Country Quiz | 0 | - | 4.79 | 32,422 |
| U.S. Federal Holidays | 0 | - | 4.33 | 99,154 |
| Top U.S. Universities | 0 | - | 4.15 | 144,323 |
| Largest United States Airlines | 0 | - | 4.39 | 54,886 |
| United States Map Quiz | 0 | - | 4.98 | 4,145,544 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 208,191 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,801 |
| U.S. States by Governor | 0 | - | 4.43 | 17,999 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,603 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,581 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.42 | 59,674 |
| 10 Closest Megacities to New York City | 0 | - | 4.52 | 67,225 |
| New England States | 0 | - | 4.51 | 59,731 |
| U.S. License Plates Picture Quiz | 0 | - | 4.59 | 52,719 |
| U.S. States with the Fewest Immigrants | 0 | - | 4.63 | 65,525 |
| U.S. States by Land Area | 0 | - | 4.61 | 52,557 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 37,919 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.80 | 65,326 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.74 | 55,071 |
| Add a Letter - Make a U.S. State | 0 | - | 4.72 | 82,463 |
| U.S. States by Borders | 0 | - | 4.63 | 35,141 |
| 10 Easternmost U.S. States | 0 | - | 4.53 | 56,300 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 101,494 |
| U.S. States with the Longest International Borders | 0 | - | 4.78 | 45,649 |
| Longest U.S. State Borders | 0 | - | 4.67 | 39,496 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.46 | 44,046 |
