| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,266 |
| Rivers of the United States | 0 | - | 4.93 | 66,400 |
| Countries with the Most Billionaires | 0 | - | 4.90 | 336,155 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,711 |
| World Currency Quiz | 0 | - | 4.92 | 304,715 |
| Countries with the Most Millionaires | 0 | - | 4.86 | 124,131 |
| Biggest Export Partners For Every Country | 0 | - | 4.98 | 50,797 |
| Top Oil Reserve Countries | 0 | - | 4.93 | 74,972 |
| Cities with the Biggest Economies | 0 | - | 4.91 | 131,343 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,861 |
| US States Quiz | 0 | - | 5.00 | 16,932,534 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 98,216 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 66,769 |
| Five Biggest Economies by Continent | 0 | - | 4.98 | 195,625 |
| Countries with the Most Exports | 0 | - | 4.96 | 155,736 |
| Top Crude Oil Producing Countries | 0 | - | 4.89 | 190,078 |
| Countries by Oil Consumption | 0 | - | 4.96 | 120,577 |
| Richest Island Countries | 0 | - | 4.85 | 100,880 |
| Largest Economies in 2050 | 0 | - | 4.90 | 111,667 |
| Richest Countries by Per-Capita GDP | 0 | - | 4.96 | 273,053 |
| Countries With Highest GDP as a Percent of Continent | 0 | - | 4.96 | 104,619 |
| Countries with the Highest GDP per Square Kilometer | 0 | - | 4.89 | 84,770 |
| Top 10 American Countries by Coastline | 0 | - | 4.96 | 88,491 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 69,744 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 53,199 |
| Mexico Cities Map Quiz | 0 | - | 4.83 | 38,718 |
| Colombia Country Quiz | 0 | - | 4.90 | 40,841 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 748,349 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 333,643 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,356 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,224 |
| Top 10 European Countries by Coastline | 0 | - | 4.88 | 138,556 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,688 |
| Top 10 Asian Countries by Coastline | 0 | - | 4.92 | 96,546 |
| Japanese Companies | 0 | - | 4.28 | 34,278 |
| African Great Lakes | 0 | - | 4.82 | 66,610 |
| Richest Countries A-Z | 0 | - | 4.91 | 103,569 |
| Large Countries with Small Economies | 0 | - | 4.95 | 81,109 |
| Richest Countries Bordering Each Other | 0 | - | 4.99 | 154,520 |
| Bordering Countries with the Largest GDPs | 0 | - | 4.97 | 76,540 |
| Countries Bordering Brazil | 0 | - | 4.96 | 131,987 |
| Countries That Visit Brazil The Most | 0 | - | 4.95 | 49,711 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 146,786 |
| US States with an Empty Map | 0 | - | 5.00 | 626,451 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,668 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 96,505 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 133,623 |
| African Great Lake Countries with an Empty Map | 0 | - | 4.97 | 60,849 |
| Animals of Australia | 0 | - | 4.52 | 42,390 |
| U.S. Geography by Letter - C | 0 | - | 4.27 | 74,348 |
| U.S. Geography by Letter - A | 0 | - | 4.37 | 63,370 |
| U.S. Geography by Letter - D | 0 | - | 4.09 | 57,332 |
| U.S. Geography by Letter - T | 0 | - | 4.29 | 50,067 |
| U.S. Geography by Letter - P | 0 | - | 4.38 | 54,221 |
| U.S. Geography by Letter - M | 0 | - | 4.14 | 53,530 |
| U.S. Geography by Letter - L | 0 | - | 4.04 | 41,381 |
| U.S. Geography by Letter - G | 0 | - | 4.13 | 39,543 |
| U.S. Geography by Letter - R | 0 | - | 4.22 | 36,291 |
| U.S. Geography By Letter - H | 0 | - | 4.35 | 40,425 |
| Biggest Trading Partners - Colombia | 0 | - | 4.88 | 40,426 |
| Biggest U.S. Car Insurance Companies | 0 | - | 4.26 | 6,135 |
| Countries Closest to Alaska | 0 | - | 4.93 | 124,697 |
| Countries Closest to Maine | 0 | - | 4.85 | 67,328 |
| People on Money - United States | 0 | - | 4.31 | 63,385 |
| U.S. States that Border Canada | 0 | - | 4.91 | 185,761 |
| U.S. States With Palm Trees | 0 | - | 4.52 | 45,851 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 209,636 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 125,398 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 126,049 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 92,414 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 62,052 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.94 | 58,279 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 530,925 |
| Asian Cities A-Z by Clue | 0 | - | 4.51 | 42,615 |
| Asian Physical Geography | 0 | - | 4.61 | 35,571 |
| African Physical Geography | 0 | - | 4.51 | 31,756 |
| Africa A-Z | 0 | - | 4.57 | 46,706 |
| World's Biggest Airlines | 0 | - | 4.42 | 125,670 |
| Countries Richer Than Their Neighbors | 0 | - | 4.47 | 72,794 |
| Oil Export Dependent Countries | 0 | - | 4.56 | 49,948 |
| Cities With the Most Billionaires | 0 | - | 4.77 | 102,450 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 52,321 |
| Fifty US States in One Minute | 0 | - | 4.61 | 3,547,094 |
| Midwestern States of the U.S. | 0 | - | 4.88 | 13,955 |
| European Geography By Letter - A | 0 | - | 4.52 | 147,095 |
| European Geography By Letter - B #1 | 0 | - | 4.69 | 120,496 |
| European Geography By Letter - C | 0 | - | 4.46 | 114,882 |
| European Geography By Letter - D | 0 | - | 4.50 | 109,436 |
| European Geography By Letter - L | 0 | - | 4.52 | 114,104 |
| European Geography By Letter - M | 0 | - | 4.67 | 131,481 |
| European Geography By Letter - N | 0 | - | 4.44 | 101,282 |
| European Geography By Letter - R | 0 | - | 4.43 | 94,099 |
| European Geography By Letter - V | 0 | - | 4.42 | 93,351 |
| European Geography By Letter - T | 0 | - | 4.41 | 82,937 |
| Europe Map Quiz | 0 | - | 5.00 | 4,774,352 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 100,964 |
| Famous Germans | 0 | - | 4.50 | 55,566 |
| Famous Italians by Clue | 0 | - | 4.45 | 89,904 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 71,301 |
| Asian Geography by Letter - H | 0 | - | 4.50 | 65,874 |
| Asian Geography By Letter - M | 0 | - | 4.48 | 61,526 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 58,036 |
| Asian Geography by Letter - T | 0 | - | 4.51 | 57,499 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 279,922 |
| Bodies of Water around the Arabian Peninsula | 0 | - | 4.74 | 36,132 |
| Middle East A-Z | 0 | - | 4.47 | 46,171 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 268,750 |
| "Big Five" African Game Animals | 0 | - | 4.22 | 47,432 |
| Busiest Container Ports | 0 | - | 4.11 | 37,446 |
| Most Valuable Sports Teams | 0 | - | 4.33 | 116,992 |
| Countries with the Highest Taxes | 0 | - | 4.38 | 87,653 |
| Countries with the Largest Merchant Navies | 0 | - | 4.56 | 22,953 |
| Top Net Food-Exporting Countries | 0 | - | 4.42 | 33,490 |
| Countries with the Most Exports per Capita | 0 | - | 4.56 | 38,880 |
| Top 10 Countries by Per Capita Crude Oil Production | 0 | - | 4.74 | 57,210 |
| Top 10 Geothermal Countries | 0 | - | 4.56 | 32,164 |
| Five Richest Countries by Continent | 0 | - | 4.69 | 207,617 |
| Countries with the Biggest Economies by GDP | 0 | - | 4.53 | 291,596 |
| Countries with the Most Billionaires per Capita | 0 | - | 4.69 | 93,920 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,320,942 |
| Oceania Map Quiz | 0 | - | 4.98 | 655,753 |
| Australian Capitals | 0 | - | 4.92 | 62,776 |
| U.S. Geography by Letter - N | 0 | - | 3.80 | 52,974 |
| U.S. Geography by Letter - E | 0 | - | 3.75 | 48,970 |
| U.S. Geography by Letter - F | 0 | - | 3.84 | 45,234 |
| U.S. Geography by Letter - O | 0 | - | 3.52 | 41,709 |
| Mexico Country Quiz | 0 | - | 4.49 | 72,571 |
| South American Geography Quiz #1 | 0 | - | 4.62 | 32,721 |
| Argentina Country Quiz | 0 | - | 4.53 | 57,638 |
| Brazil Country Quiz | 0 | - | 4.52 | 102,063 |
| Brazil Cities Map Quiz | 0 | - | 4.62 | 36,739 |
| Chile Country Quiz | 0 | - | 4.75 | 40,152 |
| Ecuador Country Quiz | 0 | - | 4.60 | 31,929 |
| Peru Country Quiz | 0 | - | 4.54 | 48,793 |
| U.S. Federal Holidays | 0 | - | 4.33 | 99,539 |
| United States Map Quiz | 0 | - | 4.98 | 4,164,827 |
| Lakes in the United States by Clue | 0 | - | 4.31 | 19,228 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 80,057 |
| California Cities A-Z | 0 | - | 4.06 | 17,331 |
| 10 Closest Megacities to New York City | 0 | - | 4.52 | 67,428 |
| Texas A-Z | 0 | - | 4.19 | 16,397 |
| U.S. History A-Z #1 | 0 | - | 4.36 | 30,223 |
| U.S. States by First Two Letters in 30 Seconds | 0 | - | 4.70 | 1,394,620 |
| US States by Borders in 30 Seconds | 0 | - | 4.68 | 2,686,685 |
| Canadian Prime Ministers | 0 | - | 4.64 | 57,721 |
| Canada A-Z | 0 | - | 4.73 | 32,906 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,400 |
| Official European Union Languages | 0 | - | 4.97 | 239,076 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,236 |
| European Geography By Letter - E | 0 | - | 4.23 | 114,345 |
| European Geography By Letter - F | 0 | - | 4.17 | 93,693 |
| European Geography By Letter - H | 0 | - | 4.30 | 96,544 |
| European Geography By Letter - G | 0 | - | 4.27 | 103,229 |
| European Geography By Letter - I | 0 | - | 4.09 | 95,976 |
| European Geography By Letter - K | 0 | - | 4.14 | 70,606 |
| European Geography By Letter - O | 0 | - | 4.29 | 63,085 |
| European Geography by Letter - W | 0 | - | 4.21 | 83,212 |
| European Physical Geography | 0 | - | 4.26 | 33,551 |
| European Geography By Letter - S #2 | 0 | - | 4.20 | 51,494 |
| European Geography A-Z | 0 | - | 4.29 | 49,387 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 429,503 |
| Famous French People | 0 | - | 4.07 | 35,915 |
| United Kingdom A-Z | 0 | - | 4.52 | 88,205 |
| Asian Geography By Letter - S | 0 | - | 4.17 | 56,157 |
| Asian Geography by Letter - D | 0 | - | 4.27 | 52,046 |
| Asian Geography by Letter - G | 0 | - | 4.36 | 51,312 |
| Asian Geography by Letter - I | 0 | - | 4.37 | 67,914 |
| Asian Geography by Letter - C | 0 | - | 4.32 | 64,872 |
| Asian Geography by Letter - N | 0 | - | 4.34 | 50,328 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,450,068 |
| Asia Map Quiz | 0 | - | 4.99 | 920,599 |
| South China Sea Countries | 0 | - | 4.78 | 57,772 |
| Asian Last Names in the United States | 0 | - | 4.43 | 46,861 |
| A Quiz About Islam | 0 | - | 4.31 | 48,521 |
| Countries That Don't Recognize Israel | 0 | - | 4.68 | 34,991 |
| Africa Map Quiz | 0 | - | 5.00 | 2,123,027 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 157,827 |
| Oceania Physical Geography | 0 | - | 4.30 | 12,706 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 51,035 |
| Australian States and Territories | 0 | - | 4.96 | 142,361 |
| Famous Australians by Description | 0 | - | 4.23 | 28,030 |
| Australian Immigration by Country | 0 | - | 4.81 | 77,386 |
| Australia Map Quiz | 0 | - | 4.95 | 345,395 |
| Flags of North and South America | 0 | - | 4.99 | 374,830 |
| 10 Biggest American Countries by Area | 0 | - | 4.95 | 112,753 |
| Top 10 Most Populous American Countries | 0 | - | 4.97 | 144,463 |
| U.S. Geography by Letter - W | 0 | - | 3.86 | 23,623 |
| Latin American Countries Map Quiz | 0 | - | 4.97 | 130,212 |
| South America Map Quiz | 0 | - | 5.00 | 1,552,403 |
| South American Geography Quiz #2 | 0 | - | 4.38 | 42,100 |
| South American Physical Geography | 0 | - | 4.58 | 18,378 |
| Countries that Beat Brazil | 0 | - | 4.49 | 68,894 |
| Uruguay Country Quiz | 0 | - | 4.84 | 31,656 |
| Cuba Country Quiz | 0 | - | 4.70 | 51,613 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,026,834 |
| North America Map Quiz | 0 | - | 4.98 | 249,783 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,836 |
| American Legal Vocabulary | 0 | - | 4.40 | 33,967 |
| 10 U.S. States With The Lowest Murder Rates | 0 | - | 4.48 | 52,330 |
| Biggest Trading Partners - United States | 0 | - | 4.63 | 106,750 |
