| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,019 |
| Rivers of the United States | 0 | - | 4.93 | 65,907 |
| Countries with the Most Billionaires | 0 | - | 4.90 | 334,151 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,150 |
| World Currency Quiz | 0 | - | 4.92 | 300,976 |
| Countries with the Most Millionaires | 0 | - | 4.86 | 122,882 |
| Biggest Export Partners For Every Country | 0 | - | 4.98 | 50,191 |
| Top Oil Reserve Countries | 0 | - | 4.93 | 74,509 |
| Cities with the Biggest Economies | 0 | - | 4.91 | 130,193 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,943 |
| US States Quiz | 0 | - | 5.00 | 16,796,158 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,659 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 66,200 |
| Five Biggest Economies by Continent | 0 | - | 4.98 | 194,590 |
| Countries with the Most Exports | 0 | - | 4.96 | 154,826 |
| Top Crude Oil Producing Countries | 0 | - | 4.89 | 189,147 |
| Countries by Oil Consumption | 0 | - | 4.96 | 119,874 |
| Richest Island Countries | 0 | - | 4.84 | 100,054 |
| Largest Economies in 2050 | 0 | - | 4.90 | 111,054 |
| Richest Countries by Per-Capita GDP | 0 | - | 4.96 | 269,137 |
| Countries With Highest GDP as a Percent of Continent | 0 | - | 4.96 | 103,792 |
| Countries with the Highest GDP per Square Kilometer | 0 | - | 4.89 | 84,159 |
| African Great Lakes | 0 | - | 4.82 | 65,790 |
| Top 10 American Countries by Coastline | 0 | - | 4.96 | 88,239 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 69,010 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 52,491 |
| Colombia Country Quiz | 0 | - | 4.90 | 40,563 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 745,531 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 330,237 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,179 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 70,964 |
| Top 10 European Countries by Coastline | 0 | - | 4.87 | 138,165 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,195 |
| Top 10 Asian Countries by Coastline | 0 | - | 4.91 | 96,320 |
| Japanese Companies | 0 | - | 4.28 | 34,167 |
| Richest Countries A-Z | 0 | - | 4.92 | 102,502 |
| Large Countries with Small Economies | 0 | - | 4.95 | 80,624 |
| Richest Countries Bordering Each Other | 0 | - | 4.99 | 153,743 |
| Bordering Countries with the Largest GDPs | 0 | - | 4.97 | 76,260 |
| African Great Lake Countries with an Empty Map | 0 | - | 4.97 | 60,618 |
| Countries Bordering Brazil | 0 | - | 4.96 | 131,344 |
| Countries That Visit Brazil The Most | 0 | - | 4.95 | 49,441 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 145,953 |
| US States with an Empty Map | 0 | - | 5.00 | 621,884 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,521 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 95,485 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 132,638 |
| African Physical Geography | 0 | - | 4.51 | 31,632 |
| Africa A-Z | 0 | - | 4.57 | 46,518 |
| Animals of Australia | 0 | - | 4.52 | 42,256 |
| U.S. Geography by Letter - C | 0 | - | 4.27 | 73,767 |
| U.S. Geography by Letter - A | 0 | - | 4.37 | 62,739 |
| U.S. Geography by Letter - D | 0 | - | 4.08 | 56,737 |
| U.S. Geography by Letter - T | 0 | - | 4.29 | 49,409 |
| U.S. Geography by Letter - P | 0 | - | 4.36 | 47,854 |
| U.S. Geography by Letter - M | 0 | - | 4.14 | 52,969 |
| U.S. Geography by Letter - L | 0 | - | 4.04 | 40,832 |
| U.S. Geography by Letter - G | 0 | - | 4.13 | 38,967 |
| U.S. Geography By Letter - H | 0 | - | 4.35 | 39,780 |
| Biggest Trading Partners - Colombia | 0 | - | 4.88 | 40,167 |
| Biggest U.S. Car Insurance Companies | 0 | - | 4.26 | 6,122 |
| Countries Closest to Alaska | 0 | - | 4.93 | 123,910 |
| Countries Closest to Maine | 0 | - | 4.85 | 66,828 |
| People on Money - United States | 0 | - | 4.31 | 63,289 |
| U.S. States that Border Canada | 0 | - | 4.91 | 183,902 |
| U.S. States With Palm Trees | 0 | - | 4.52 | 45,723 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 124,307 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 125,184 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 91,634 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,743 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.94 | 57,922 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 528,067 |
| Asian Cities A-Z by Clue | 0 | - | 4.52 | 35,252 |
| Asian Physical Geography | 0 | - | 4.61 | 35,461 |
| World's Biggest Airlines | 0 | - | 4.42 | 124,602 |
| Countries Richer Than Their Neighbors | 0 | - | 4.46 | 72,439 |
| Oil Export Dependent Countries | 0 | - | 4.56 | 49,743 |
| Cities With the Most Billionaires | 0 | - | 4.77 | 102,263 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 267,542 |
| "Big Five" African Game Animals | 0 | - | 4.22 | 47,318 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 51,992 |
| Fifty US States in One Minute | 0 | - | 4.61 | 3,529,538 |
| European Geography By Letter - A | 0 | - | 4.61 | 132,736 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 111,165 |
| European Geography By Letter - C | 0 | - | 4.46 | 112,138 |
| European Geography By Letter - D | 0 | - | 4.50 | 107,026 |
| European Geography By Letter - L | 0 | - | 4.52 | 112,484 |
| European Geography By Letter - M | 0 | - | 4.64 | 129,388 |
| European Geography By Letter - N | 0 | - | 4.44 | 100,060 |
| European Geography By Letter - R | 0 | - | 4.42 | 92,836 |
| European Geography By Letter - V | 0 | - | 4.43 | 92,467 |
| European Geography By Letter - T | 0 | - | 4.41 | 81,655 |
| Europe Map Quiz | 0 | - | 5.00 | 4,748,845 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 99,824 |
| Famous Germans | 0 | - | 4.50 | 54,880 |
| Famous Italians by Clue | 0 | - | 4.45 | 88,965 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 70,973 |
| Asian Geography by Letter - H | 0 | - | 4.49 | 65,533 |
| Asian Geography By Letter - M | 0 | - | 4.47 | 61,275 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 57,738 |
| Asian Geography by Letter - T | 0 | - | 4.50 | 57,207 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 278,342 |
| Bodies of Water around the Arabian Peninsula | 0 | - | 4.74 | 36,001 |
| Middle East A-Z | 0 | - | 4.47 | 45,935 |
| Busiest Container Ports | 0 | - | 4.11 | 37,353 |
| Most Valuable Sports Teams | 0 | - | 4.33 | 116,115 |
| Countries with the Highest Taxes | 0 | - | 4.38 | 87,085 |
| Top Net Food-Exporting Countries | 0 | - | 4.42 | 33,383 |
| Countries with the Most Exports per Capita | 0 | - | 4.56 | 38,814 |
| Top 10 Countries by Per Capita Crude Oil Production | 0 | - | 4.74 | 57,038 |
| Top 10 Geothermal Countries | 0 | - | 4.56 | 32,077 |
| Five Richest Countries by Continent | 0 | - | 4.69 | 206,847 |
| Countries with the Biggest Economies by GDP | 0 | - | 4.53 | 288,959 |
| Countries with the Most Billionaires per Capita | 0 | - | 4.69 | 93,484 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,311,479 |
| Africa Map Quiz | 0 | - | 5.00 | 2,111,867 |
| Oceania Map Quiz | 0 | - | 4.98 | 639,152 |
| Australian Capitals | 0 | - | 4.92 | 62,671 |
| U.S. Geography by Letter - N | 0 | - | 3.80 | 52,518 |
| U.S. Geography by Letter - E | 0 | - | 3.75 | 48,512 |
| U.S. Geography by Letter - F | 0 | - | 3.87 | 44,771 |
| U.S. Geography by Letter - O | 0 | - | 3.52 | 41,225 |
| U.S. Geography by Letter - R | 0 | - | 4.18 | 30,640 |
| Mexico Country Quiz | 0 | - | 4.49 | 72,249 |
| Mexico Cities Map Quiz | 0 | - | 4.83 | 36,481 |
| South American Geography Quiz #2 | 0 | - | 4.61 | 39,276 |
| South American Geography Quiz #1 | 0 | - | 4.62 | 32,536 |
| Argentina Country Quiz | 0 | - | 4.53 | 57,320 |
| Brazil Country Quiz | 0 | - | 4.52 | 101,492 |
| Brazil Cities Map Quiz | 0 | - | 4.62 | 36,515 |
| Chile Country Quiz | 0 | - | 4.75 | 39,923 |
| Ecuador Country Quiz | 0 | - | 4.60 | 31,764 |
| Peru Country Quiz | 0 | - | 4.54 | 48,504 |
| U.S. Federal Holidays | 0 | - | 4.33 | 99,388 |
| United States Map Quiz | 0 | - | 4.98 | 4,149,774 |
| Lakes in the United States by Clue | 0 | - | 4.31 | 19,206 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,874 |
| California Cities A-Z | 0 | - | 4.06 | 17,140 |
| 10 Closest Megacities to New York City | 0 | - | 4.52 | 67,262 |
| Texas A-Z | 0 | - | 4.18 | 16,344 |
| U.S. History A-Z #1 | 0 | - | 4.36 | 29,840 |
| U.S. States by First Two Letters in 30 Seconds | 0 | - | 4.69 | 1,386,702 |
| US States by Borders in 30 Seconds | 0 | - | 4.67 | 2,673,678 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,325 |
| Canada A-Z | 0 | - | 4.73 | 32,739 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 68,893 |
| Official European Union Languages | 0 | - | 4.97 | 237,807 |
| European Countries in their Native Language | 0 | - | 4.99 | 157,414 |
| European Geography By Letter - E | 0 | - | 4.23 | 112,469 |
| European Geography By Letter - F | 0 | - | 4.17 | 91,885 |
| European Geography By Letter - H | 0 | - | 4.30 | 95,141 |
| European Geography By Letter - G | 0 | - | 4.27 | 101,760 |
| European Geography By Letter - I | 0 | - | 4.10 | 94,701 |
| European Geography By Letter - K | 0 | - | 4.14 | 69,388 |
| European Geography By Letter - O | 0 | - | 4.28 | 62,105 |
| European Geography by Letter - W | 0 | - | 4.20 | 82,451 |
| European Physical Geography | 0 | - | 4.26 | 33,439 |
| European Geography By Letter - S #2 | 0 | - | 4.19 | 50,672 |
| European Geography A-Z | 0 | - | 4.29 | 49,134 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 426,816 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,472 |
| Asian Geography By Letter - S | 0 | - | 4.16 | 56,001 |
| Asian Geography by Letter - D | 0 | - | 4.27 | 51,818 |
| Asian Geography by Letter - G | 0 | - | 4.35 | 51,106 |
| Asian Geography by Letter - I | 0 | - | 4.36 | 67,650 |
| Asian Geography by Letter - C | 0 | - | 4.32 | 64,613 |
| Asian Geography by Letter - N | 0 | - | 4.33 | 50,131 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,444,708 |
| Asia Map Quiz | 0 | - | 4.99 | 911,903 |
| South China Sea Countries | 0 | - | 4.78 | 57,608 |
| Asian Last Names in the United States | 0 | - | 4.43 | 46,656 |
| A Quiz About Islam | 0 | - | 4.31 | 48,352 |
| Countries That Don't Recognize Israel | 0 | - | 4.63 | 34,686 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 156,541 |
| Countries of Africa | 0 | - | 5.00 | 2,524,045 |
| Africa Cities Map Quiz | 0 | - | 4.97 | 98,738 |
| Flags of Africa Quiz | 0 | - | 5.00 | 467,577 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 46,368 |
| Largest Land Animals of Africa | 0 | - | 4.36 | 12,730 |
| Top 10 Biggest African Countries by Area | 0 | - | 4.99 | 216,362 |
| 10 Southernmost Countries in Africa | 0 | - | 4.98 | 115,984 |
| 10 Northernmost Countries in Africa | 0 | - | 4.98 | 160,785 |
| Top 10 Smallest African Countries by Area | 0 | - | 4.96 | 32,903 |
| African East Coast | 0 | - | 4.96 | 95,618 |
| African Countries with the Shortest Names | 0 | - | 4.98 | 152,862 |
| Western Africa Map Quiz | 0 | - | 4.97 | 73,444 |
| Top African Languages on a Map | 0 | - | 4.92 | 73,345 |
| African Island Countries | 0 | - | 4.96 | 101,244 |
| Top 10 African Countries by Coastline | 0 | - | 4.27 | 47,876 |
| Countries of Africa with an Empty Map | 0 | - | 5.00 | 242,755 |
| Oceania Physical Geography | 0 | - | 4.30 | 12,661 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 50,274 |
| Australian States and Territories | 0 | - | 4.96 | 141,460 |
| Famous Australians by Description | 0 | - | 4.23 | 27,812 |
| Australian Immigration by Country | 0 | - | 4.81 | 77,172 |
| Australia Map Quiz | 0 | - | 4.94 | 343,445 |
| Flags of North and South America | 0 | - | 4.99 | 370,778 |
| 10 Biggest American Countries by Area | 0 | - | 4.95 | 112,441 |
| Top 10 Most Populous American Countries | 0 | - | 4.97 | 143,592 |
| U.S. Geography by Letter - W | 0 | - | 3.84 | 23,162 |
