| All First-Level Subdivisions of South America on a Map | 0 | - | 4.92 | 54,088 |
| States of Brazil | 0 | - | 4.97 | 88,409 |
| States of Mexico | 0 | - | 4.96 | 176,507 |
| Brazil States Map Quiz | 0 | - | 4.85 | 48,201 |
| Colombia Country Quiz | 0 | - | 4.90 | 40,774 |
| South American Geography Quiz #2 | 0 | - | 4.61 | 39,379 |
| South American Geography Quiz #1 | 0 | - | 4.62 | 32,593 |
| Argentina Country Quiz | 0 | - | 4.53 | 57,560 |
| Countries Bordering Brazil | 0 | - | 4.96 | 131,773 |
| Countries That Visit Brazil The Most | 0 | - | 4.95 | 49,633 |
| Famous Mexicans and Mexican-Americans | 0 | - | 4.15 | 16,948 |
| Flags of North and South America | 0 | - | 4.99 | 373,844 |
| South American Physical Geography | 0 | - | 4.58 | 18,362 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,479 |
| South America Capitals Quiz | 0 | - | 5.00 | 482,134 |
| Famous Germans | 0 | - | 4.50 | 55,435 |
| Famous Italians by Clue | 0 | - | 4.45 | 89,650 |
| The Only American Country ... | 0 | - | 4.92 | 121,749 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 121,223 |
| Uruguay Country Quiz | 0 | - | 4.84 | 31,623 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,641 |
| US States Quiz | 0 | - | 5.00 | 16,902,122 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 367,348 |
| Canada A-Z | 0 | - | 4.73 | 32,870 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 66,587 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 92,306 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 69,478 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 52,912 |
| Hispanic Last Names in the U.S. | 0 | - | 4.31 | 54,782 |
| Mexico States Map Quiz | 0 | - | 4.84 | 104,909 |
| Countries of South America with an Empty Map | 0 | - | 4.94 | 105,020 |
| Brazil Country Quiz | 0 | - | 4.52 | 101,930 |
| Brazil Cities Map Quiz | 0 | - | 4.62 | 36,678 |
| Chile Country Quiz | 0 | - | 4.77 | 40,106 |
| Ecuador Country Quiz | 0 | - | 4.60 | 31,893 |
| Peru Country Quiz | 0 | - | 4.54 | 48,713 |
| Name the U.S. National Parks | 0 | - | 4.86 | 60,045 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 747,678 |
| Total United States Immigration by Country | 0 | - | 4.91 | 111,781 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 174,718 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 244,541 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 332,735 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,919 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,320 |
| Famous French People | 0 | - | 4.07 | 35,740 |
| Famous Australians by Description | 0 | - | 4.23 | 27,978 |
| Top 10 American Countries by Coastline | 0 | - | 4.96 | 88,453 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.93 | 84,279 |
| Mexico Cities Map Quiz | 0 | - | 4.83 | 38,618 |
| South American Capitals - Map Quiz | 0 | - | 4.98 | 130,660 |
| Which South American Country? | 0 | - | 4.69 | 51,973 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,211 |
| Pixelated United States Map | 0 | - | 4.87 | 94,394 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 109,855 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 91,910 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 146,593 |
| Countries that Beat the United States | 0 | - | 4.93 | 167,700 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,971 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 118,050 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 111,608 |
| 10 Southernmost U.S. States | 0 | - | 4.89 | 113,581 |
| U.S. States with Short Names | 0 | - | 4.91 | 149,200 |
| U.S. States that Start with M | 0 | - | 4.93 | 187,505 |
| U.S. States By Population | 0 | - | 4.92 | 153,667 |
| U.S. States that Start with N | 0 | - | 4.95 | 171,616 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,536 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 48,762 |
| US States with an Empty Map | 0 | - | 5.00 | 625,488 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,286 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 65,729 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,879 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,566 |
| Most-Visited Countries by Canadians | 0 | - | 4.82 | 39,434 |
| Countries Closest to Canada | 0 | - | 4.91 | 198,498 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,628 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 96,254 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 133,392 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,634 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 18,077 |
| Africa A-Z | 0 | - | 4.57 | 46,649 |
| U.S. Geography by Letter - C | 0 | - | 4.27 | 74,132 |
| U.S. Geography by Letter - A | 0 | - | 4.37 | 63,144 |
| U.S. Geography by Letter - D | 0 | - | 4.09 | 57,137 |
| U.S. Geography by Letter - T | 0 | - | 4.29 | 49,838 |
| U.S. Geography by Letter - P | 0 | - | 4.38 | 53,964 |
| U.S. Geography by Letter - M | 0 | - | 4.14 | 53,359 |
| U.S. Geography by Letter - L | 0 | - | 4.04 | 41,195 |
| U.S. Geography by Letter - G | 0 | - | 4.13 | 39,358 |
| U.S. Geography By Letter - H | 0 | - | 4.35 | 40,209 |
| Guyana Country Quiz | 0 | - | 4.50 | 22,832 |
| Countries that Beat Brazil | 0 | - | 4.49 | 68,761 |
| Venezuela Country Quiz | 0 | - | 4.51 | 30,633 |
| Paraguay Country Quiz | 0 | - | 4.54 | 25,323 |
| Bolivia Country Quiz | 0 | - | 4.63 | 26,289 |
| Suriname Country Quiz | 0 | - | 4.61 | 19,839 |
| American Legal Vocabulary | 0 | - | 4.40 | 33,943 |
| People on Money - United States | 0 | - | 4.31 | 63,361 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 209,292 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 125,035 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 125,827 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 92,248 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,957 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 530,186 |
| Famous Russians | 0 | - | 4.16 | 23,856 |
| Famous Irish People | 0 | - | 4.05 | 46,013 |
| Famous Nordic People | 0 | - | 4.34 | 20,153 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,620 |
| Asian Cities A-Z by Clue | 0 | - | 4.50 | 40,868 |
| Famous Chinese People | 0 | - | 4.09 | 11,885 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 268,464 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 52,256 |
| Midwestern States of the U.S. | 0 | - | 4.88 | 13,869 |
| European Geography By Letter - A | 0 | - | 4.52 | 146,499 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 119,932 |
| European Geography By Letter - C | 0 | - | 4.46 | 114,194 |
| European Geography By Letter - D | 0 | - | 4.50 | 108,817 |
| European Geography By Letter - L | 0 | - | 4.52 | 113,662 |
| European Geography By Letter - M | 0 | - | 4.67 | 130,883 |
| European Geography By Letter - P #1 | 0 | - | 4.80 | 97,675 |
| European Geography By Letter - N | 0 | - | 4.44 | 100,972 |
| European Geography By Letter - R | 0 | - | 4.42 | 93,820 |
| European Geography By Letter - V | 0 | - | 4.42 | 93,116 |
| European Geography By Letter - T | 0 | - | 4.41 | 82,578 |
| Europe Map Quiz | 0 | - | 5.00 | 4,767,991 |
| European Geography By Letter - S #1 | 0 | - | 4.62 | 100,711 |
| Famous Scottish People | 0 | - | 4.22 | 18,408 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 71,193 |
| Asian Geography by Letter - H | 0 | - | 4.50 | 65,775 |
| Asian Geography By Letter - M | 0 | - | 4.47 | 61,461 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 57,964 |
| Asian Geography by Letter - T | 0 | - | 4.51 | 57,415 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 279,453 |
| Middle East A-Z | 0 | - | 4.47 | 46,101 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,318,624 |
| Africa Map Quiz | 0 | - | 5.00 | 2,120,397 |
| Oceania Map Quiz | 0 | - | 4.98 | 643,326 |
| Australian Capitals | 0 | - | 4.92 | 62,739 |
| U.S. Geography by Letter - N | 0 | - | 3.80 | 52,781 |
| U.S. Geography by Letter - E | 0 | - | 3.75 | 48,803 |
| U.S. Geography by Letter - F | 0 | - | 3.84 | 45,068 |
| U.S. Geography by Letter - O | 0 | - | 3.52 | 41,529 |
| U.S. Geography by Letter - R | 0 | - | 4.18 | 31,068 |
| Islands of the Galápagos | 0 | - | 4.54 | 4,784 |
| South American Cities on the Map | 0 | - | 4.53 | 35,449 |
| Largest Virgin Islands | 0 | - | 4.24 | 5,305 |
| U.S. State Nicknames | 0 | - | 4.47 | 50,569 |
| Countries with American Expatriates | 0 | - | 4.53 | 42,601 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 40,199 |
| United States Country Quiz | 0 | - | 4.43 | 101,648 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 76,918 |
| Canada Country Quiz | 0 | - | 4.54 | 132,598 |
| Canada Cities Map Quiz | 0 | - | 4.64 | 124,287 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,259 |
| Official European Union Languages | 0 | - | 4.97 | 238,762 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,033 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 428,693 |
| United Kingdom A-Z | 0 | - | 4.52 | 88,112 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,449,141 |
| Asia Map Quiz | 0 | - | 4.99 | 918,451 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 60,036 |
| A Quiz About Islam | 0 | - | 4.31 | 48,477 |
| Countries That Don't Recognize Israel | 0 | - | 4.68 | 34,912 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 157,486 |
| Countries of Africa | 0 | - | 5.00 | 2,542,015 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 47,004 |
| African East Coast | 0 | - | 4.96 | 96,185 |
| Western Africa Map Quiz | 0 | - | 4.97 | 74,049 |
| Canada or Africa by Area | 0 | - | 4.78 | 18,401 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 50,830 |
| Australia Map Quiz | 0 | - | 4.95 | 344,919 |
| Mexico Country Quiz | 0 | - | 4.49 | 72,495 |
| History of Mexico | 0 | - | 4.58 | 15,323 |
| Paraguay... or Uruguay? | 0 | - | 4.55 | 26,726 |
| Cuba Country Quiz | 0 | - | 4.70 | 51,560 |
| Haiti... or Dominican Republic? | 0 | - | 4.70 | 40,754 |
| Jamaica Country Quiz | 0 | - | 4.58 | 35,126 |
| Haiti Country Quiz | 0 | - | 4.79 | 32,648 |
| U.S. Federal Holidays | 0 | - | 4.33 | 99,493 |
| Top U.S. Universities | 0 | - | 4.15 | 145,278 |
| Largest United States Airlines | 0 | - | 4.39 | 55,057 |
| United States Map Quiz | 0 | - | 4.98 | 4,161,976 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 209,690 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 80,014 |
| U.S. States by Governor | 0 | - | 4.43 | 18,073 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,709 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,701 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.42 | 59,932 |
| 10 Closest Megacities to New York City | 0 | - | 4.52 | 67,376 |
| Events in U.S. History | 0 | - | 4.41 | 28,696 |
| New England States | 0 | - | 4.51 | 59,826 |
| U.S. License Plates Picture Quiz | 0 | - | 4.61 | 52,971 |
| U.S. States with the Fewest Immigrants | 0 | - | 4.63 | 65,856 |
| U.S. States by Land Area | 0 | - | 4.61 | 52,857 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 38,026 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.80 | 65,515 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.74 | 55,225 |
| Add a Letter - Make a U.S. State | 0 | - | 4.70 | 82,878 |
| U.S. States by Borders | 0 | - | 4.61 | 35,355 |
| 10 Easternmost U.S. States | 0 | - | 4.53 | 56,518 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 102,116 |
