| States of Brazil | 0 | - | 4.98 | 86,298 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.92 | 52,891 |
| Brazil States Map Quiz | 0 | - | 4.85 | 47,360 |
| Countries Bordering Brazil | 0 | - | 4.96 | 131,020 |
| States of Mexico | 0 | - | 4.95 | 173,215 |
| Colombia Country Quiz | 0 | - | 4.90 | 40,298 |
| South American Geography Quiz #2 | 0 | - | 4.61 | 39,184 |
| South American Geography Quiz #1 | 0 | - | 4.73 | 32,461 |
| Brazil Country Quiz | 0 | - | 4.52 | 101,047 |
| Countries That Visit Brazil The Most | 0 | - | 4.95 | 49,267 |
| South America A-Z | 0 | - | 4.13 | 10,835 |
| Flags of North and South America | 0 | - | 4.99 | 366,524 |
| South American Physical Geography | 0 | - | 4.58 | 18,265 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 86,816 |
| South America Capitals Quiz | 0 | - | 5.00 | 477,038 |
| Famous Germans | 0 | - | 4.50 | 54,591 |
| Famous Italians by Clue | 0 | - | 4.45 | 88,295 |
| The Only American Country ... | 0 | - | 4.92 | 120,708 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 120,300 |
| Uruguay Country Quiz | 0 | - | 4.83 | 31,341 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,259 |
| US States Quiz | 0 | - | 5.00 | 16,690,044 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 365,168 |
| Canada A-Z | 0 | - | 4.73 | 32,638 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,294 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 65,965 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 91,039 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 68,517 |
| U.S. Geography by Letter - S | 0 | - | 4.54 | 52,068 |
| Hispanic Last Names in the U.S. | 0 | - | 4.31 | 54,609 |
| Famous Mexicans and Mexican-Americans | 0 | - | 4.15 | 16,904 |
| Mexico States Map Quiz | 0 | - | 4.84 | 103,734 |
| Countries of South America with an Empty Map | 0 | - | 4.94 | 104,104 |
| Argentina Country Quiz | 0 | - | 4.53 | 57,065 |
| Brazil Cities Map Quiz | 0 | - | 4.62 | 36,360 |
| Chile Country Quiz | 0 | - | 4.75 | 39,701 |
| Peru Country Quiz | 0 | - | 4.54 | 48,281 |
| Name the U.S. National Parks | 0 | - | 4.86 | 58,631 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 742,972 |
| Total United States Immigration by Country | 0 | - | 4.91 | 110,602 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 173,092 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 240,502 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 327,742 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,503 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.84 | 65,578 |
| Famous Australians by Description | 0 | - | 4.23 | 27,516 |
| Top 10 American Countries by Coastline | 0 | - | 4.96 | 88,058 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.90 | 76,064 |
| South American Capitals - Map Quiz | 0 | - | 4.98 | 129,377 |
| Which South American Country? | 0 | - | 4.69 | 51,706 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 38,788 |
| Pixelated United States Map | 0 | - | 4.89 | 93,421 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 108,385 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 90,800 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 145,348 |
| Countries that Beat the United States | 0 | - | 4.93 | 165,479 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,188 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 116,659 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 110,298 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 112,349 |
| U.S. States with Short Names | 0 | - | 4.91 | 147,572 |
| U.S. States that Start with M | 0 | - | 4.93 | 185,838 |
| U.S. States By Population | 0 | - | 4.92 | 152,305 |
| U.S. States that Start with N | 0 | - | 4.95 | 170,328 |
| U.S. States with Longest Names | 0 | - | 4.84 | 43,824 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 47,510 |
| US States with an Empty Map | 0 | - | 5.00 | 618,474 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 63,735 |
| The Only Remaining U.S. State . . . | 0 | - | 4.92 | 64,835 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,035 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 81,904 |
| Countries Closest to Canada | 0 | - | 4.90 | 197,298 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,437 |
| U.S. States or European Countries by Area | 0 | - | 4.94 | 94,630 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 131,855 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 17,958 |
| Africa A-Z | 0 | - | 4.57 | 46,355 |
| U.S. Geography by Letter - C | 0 | - | 4.26 | 73,329 |
| U.S. Geography by Letter - A | 0 | - | 4.38 | 62,296 |
| U.S. Geography by Letter - D | 0 | - | 4.08 | 56,292 |
| U.S. Geography by Letter - T | 0 | - | 4.27 | 48,981 |
| U.S. Geography by Letter - P | 0 | - | 4.34 | 47,371 |
| U.S. Geography by Letter - M | 0 | - | 4.13 | 52,581 |
| U.S. Geography by Letter - L | 0 | - | 4.03 | 40,341 |
| U.S. Geography by Letter - G | 0 | - | 4.12 | 38,587 |
| U.S. Geography By Letter - H | 0 | - | 4.35 | 39,313 |
| Guyana Country Quiz | 0 | - | 4.49 | 22,574 |
| Countries that Beat Brazil | 0 | - | 4.49 | 67,847 |
| Ecuador Country Quiz | 0 | - | 4.60 | 31,593 |
| Venezuela Country Quiz | 0 | - | 4.50 | 30,377 |
| Paraguay Country Quiz | 0 | - | 4.53 | 25,067 |
| Bolivia Country Quiz | 0 | - | 4.63 | 25,999 |
| Suriname Country Quiz | 0 | - | 4.60 | 19,656 |
| American Legal Vocabulary | 0 | - | 4.40 | 33,784 |
| People on Money - United States | 0 | - | 4.31 | 63,199 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 206,570 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 123,821 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 124,598 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 90,987 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,524 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 526,181 |
| Famous Russians | 0 | - | 4.16 | 23,716 |
| Famous French People | 0 | - | 4.12 | 27,912 |
| Famous Irish People | 0 | - | 4.05 | 45,852 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,540 |
| Asian Cities A-Z by Clue | 0 | - | 4.53 | 33,890 |
| Famous Chinese People | 0 | - | 4.09 | 11,796 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 266,425 |
| Mexican Foods | 0 | - | 4.07 | 14,606 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 51,709 |
| European Geography By Letter - A | 0 | - | 4.56 | 132,342 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 110,846 |
| European Geography By Letter - C | 0 | - | 4.46 | 111,778 |
| European Geography By Letter - D | 0 | - | 4.50 | 106,654 |
| European Geography By Letter - L | 0 | - | 4.52 | 112,178 |
| European Geography By Letter - M | 0 | - | 4.61 | 128,819 |
| European Geography By Letter - N | 0 | - | 4.44 | 99,636 |
| European Geography By Letter - R | 0 | - | 4.42 | 92,599 |
| European Geography By Letter - V | 0 | - | 4.43 | 92,002 |
| European Geography By Letter - T | 0 | - | 4.41 | 81,269 |
| Europe Map Quiz | 0 | - | 5.00 | 4,729,418 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 99,568 |
| Famous Scottish People | 0 | - | 4.22 | 18,326 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 70,806 |
| Asian Geography by Letter - H | 0 | - | 4.49 | 65,371 |
| Asian Geography By Letter - M | 0 | - | 4.47 | 61,138 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 57,546 |
| Asian Geography by Letter - T | 0 | - | 4.50 | 57,045 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 277,037 |
| Asian Geography By Letter - L | 0 | - | 4.49 | 42,686 |
| Middle East A-Z | 0 | - | 4.47 | 45,764 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,304,178 |
| Africa Map Quiz | 0 | - | 5.00 | 2,103,554 |
| Oceania Map Quiz | 0 | - | 4.98 | 634,910 |
| Australian Capitals | 0 | - | 4.92 | 62,589 |
| U.S. Geography by Letter - N | 0 | - | 3.79 | 52,132 |
| U.S. Geography by Letter - E | 0 | - | 3.73 | 48,181 |
| U.S. Geography by Letter - F | 0 | - | 3.86 | 44,437 |
| U.S. Geography by Letter - O | 0 | - | 3.43 | 33,784 |
| U.S. Geography by Letter - R | 0 | - | 4.15 | 30,254 |
| Islands of the Galápagos | 0 | - | 4.54 | 4,754 |
| South American Cities on the Map | 0 | - | 4.57 | 35,238 |
| Largest Virgin Islands | 0 | - | 4.24 | 5,273 |
| U.S. State Nicknames Quiz | 0 | - | 4.47 | 50,249 |
| Countries with American Expatriates | 0 | - | 4.53 | 42,465 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 40,072 |
| United States Country Quiz | 0 | - | 4.43 | 100,533 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 76,587 |
| Canada Country Quiz | 0 | - | 4.54 | 131,671 |
| Canada Cities Map Quiz | 0 | - | 4.63 | 123,577 |
| Count to 10 in Europe: Pro | 0 | - | 4.85 | 68,553 |
| Official European Union Languages | 0 | - | 4.97 | 236,440 |
| European Countries in their Native Language | 0 | - | 4.99 | 156,649 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 425,012 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,187 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,439,209 |
| Asia Map Quiz | 0 | - | 4.99 | 906,512 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 59,632 |
| A Quiz About Islam | 0 | - | 4.31 | 48,191 |
| Countries That Don't Recognize Israel | 0 | - | 4.63 | 34,416 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 155,721 |
| Countries of Africa | 0 | - | 5.00 | 2,506,153 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 45,767 |
| African East Coast | 0 | - | 4.96 | 94,986 |
| Western Africa Map Quiz | 0 | - | 4.97 | 72,876 |
| Canada or Africa by Area | 0 | - | 4.77 | 18,048 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 49,750 |
| Australia Map Quiz | 0 | - | 4.94 | 342,358 |
| Mexico Country Quiz | 0 | - | 4.49 | 71,956 |
| Mexico Cities Map Quiz | 0 | - | 4.77 | 33,308 |
| History of Mexico | 0 | - | 4.58 | 15,227 |
| Paraguay... or Uruguay? | 0 | - | 4.55 | 26,598 |
| Cuba Country Quiz | 0 | - | 4.69 | 51,145 |
| Haiti... or Dominican Republic? | 0 | - | 4.70 | 40,574 |
| Jamaica Country Quiz | 0 | - | 4.58 | 34,849 |
| Haiti Country Quiz | 0 | - | 4.79 | 32,331 |
| U.S. Federal Holidays | 0 | - | 4.33 | 99,082 |
| Top U.S. Universities | 0 | - | 4.15 | 143,999 |
| Largest United States Airlines | 0 | - | 4.39 | 54,825 |
| United States Map Quiz | 0 | - | 4.98 | 4,140,730 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 207,774 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,721 |
| U.S. States by Governor | 0 | - | 4.43 | 17,978 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,567 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,542 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.42 | 59,575 |
| 10 Closest Megacities to New York City | 0 | - | 4.52 | 67,189 |
| New England States | 0 | - | 4.51 | 59,702 |
| U.S. License Plates Picture Quiz | 0 | - | 4.59 | 52,641 |
| U.S. States with the Fewest Immigrants | 0 | - | 4.63 | 65,381 |
| U.S. States by Land Area | 0 | - | 4.61 | 52,455 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 37,880 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.80 | 65,266 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.74 | 55,017 |
| Add a Letter - Make a U.S. State | 0 | - | 4.72 | 82,291 |
| U.S. States by Borders | 0 | - | 4.63 | 35,056 |
| 10 Easternmost U.S. States | 0 | - | 4.53 | 56,220 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 101,109 |
| U.S. States with the Longest International Borders | 0 | - | 4.78 | 45,560 |
| Longest U.S. State Borders | 0 | - | 4.67 | 39,355 |
