| 19th Century A-Z | 0 | - | 4.77 | 46,828 |
| 16th Century A-Z | 0 | - | 4.58 | 24,440 |
| 15th Century A-Z | 0 | - | 4.49 | 23,432 |
| 14th Century A-Z | 0 | - | 4.41 | 23,861 |
| 17th Century A-Z | 0 | - | 4.78 | 34,230 |
| Southernmost Countries A-Z | 0 | - | 4.94 | 152,981 |
| Northernmost Countries A-Z | 0 | - | 4.99 | 194,405 |
| Least Populous Countries A-Z | 0 | - | 4.99 | 169,671 |
| Biggest Countries by Area A-Z | 0 | - | 4.96 | 191,283 |
| Most Populous Countries A-Z | 0 | - | 4.98 | 299,846 |
| Countries A-Z by Neighbor | 0 | - | 5.00 | 179,676 |
| Countries with the Greatest Elevation A-Z | 0 | - | 4.83 | 72,394 |
| Shortest Country Name A-Z | 0 | - | 5.00 | 235,640 |
| Name an Official Language A-Z | 0 | - | 4.91 | 175,256 |
| Countries with the Most Borders A-Z | 0 | - | 4.98 | 125,032 |
| Empires A-Z | 0 | - | 4.51 | 44,974 |
| History by Letter - A | 0 | - | 4.51 | 152,442 |
| History by Letter - B | 0 | - | 4.45 | 171,634 |
| History by Letter - C | 0 | - | 4.70 | 170,764 |
| History by Letter - E | 0 | - | 4.51 | 140,149 |
| History by Letter - G | 0 | - | 4.46 | 121,706 |
| History by Letter - H | 0 | - | 4.45 | 136,159 |
| History by Letter - J | 0 | - | 4.51 | 153,565 |
| History by Letter - N | 0 | - | 4.45 | 103,600 |
| History by Letter - S | 0 | - | 4.47 | 93,856 |
| History by Letter - W | 0 | - | 4.45 | 108,976 |
| History by Letter - M | 0 | - | 4.54 | 119,340 |
| History by Letter - K | 0 | - | 4.50 | 101,030 |
| History by Letter - L | 0 | - | 4.50 | 111,737 |
| History by Letter - I | 0 | - | 4.46 | 103,892 |
| Countries that Start with a Vowel | 0 | - | 4.99 | 129,300 |
| Geography by Letter - T | 0 | - | 4.84 | 152,982 |
| People in History A-Z #1 | 0 | - | 4.61 | 98,794 |
| People in History A-Z #2 | 0 | - | 4.47 | 54,935 |
| People in History A-Z #3 | 0 | - | 4.44 | 46,052 |
| World Cities A-Z by Clue #1 | 0 | - | 4.50 | 67,204 |
| Islands A-Z | 0 | - | 4.46 | 117,091 |
| Human Body A-Z | 0 | - | 4.51 | 128,839 |
| Asian Cities A-Z by Clue | 0 | - | 4.52 | 35,102 |
| Animals A-Z #1 | 0 | - | 4.41 | 93,005 |
| Africa A-Z | 0 | - | 4.57 | 46,484 |
| Diseases and Medical Conditions A-Z | 0 | - | 4.68 | 57,126 |
| Name a Valid Year in History | 0 | - | 4.93 | 66,708 |
| History by Letter - D | 0 | - | 4.39 | 137,156 |
| History by Letter - F | 0 | - | 4.18 | 113,897 |
| History by Letter - O | 0 | - | 4.32 | 99,231 |
| History by Letter - P | 0 | - | 4.39 | 107,529 |
| History by Letter - Q | 0 | - | 4.34 | 80,120 |
| History by Letter - R | 0 | - | 4.26 | 121,865 |
| History by Letter - T | 0 | - | 4.39 | 105,024 |
| History by Letter - U | 0 | - | 4.19 | 100,537 |
| History by Letter - V | 0 | - | 4.27 | 80,535 |
| History by Letter - Y | 0 | - | 4.27 | 87,071 |
| History by Letter - Z | 0 | - | 4.18 | 76,858 |
| The 3rd and 4th Century | 0 | - | 4.60 | 27,172 |
| Geography by Letter on the World Map - A-Z | 0 | - | 4.89 | 81,603 |
| Geography by Letter on the World Map - A | 0 | - | 4.81 | 107,279 |
| Middle East A-Z | 0 | - | 4.47 | 45,903 |
| World Cities Based on Location A-Z - #1 | 0 | - | 4.45 | 44,230 |
| Military History A-Z | 0 | - | 4.20 | 21,091 |
| Time Magazine Person of the Year | 0 | - | 4.53 | 73,780 |
| Countries That Were Invaded | 0 | - | 4.55 | 97,134 |
| People in History A-Z #5 | 0 | - | 4.09 | 31,862 |
| Double Letters A-Z | 0 | - | 4.51 | 27,110 |
| World Cities A-Z by Clue #2 | 0 | - | 4.40 | 58,496 |
| Animals A-Z #2 | 0 | - | 4.12 | 66,159 |
| Canada A-Z | 0 | - | 4.73 | 32,715 |
| Normandy D-Day Beaches | 0 | - | 4.83 | 40,241 |
| Territory Changes in World War I | 0 | - | 4.87 | 46,429 |
| Same Start and End Letter - History #1 | 0 | - | 4.17 | 24,699 |
| Same Start and End Letter - History #2 | 0 | - | 4.13 | 25,599 |
| People Depicted in Paintings | 0 | - | 4.54 | 44,481 |
| WWII A-Z #1 | 0 | - | 4.80 | 102,641 |
| WWII A-Z #2 | 0 | - | 4.44 | 54,475 |
| People in History A-Z #4 | 0 | - | 4.10 | 22,968 |
| NATO Military Alphabet | 0 | - | 4.98 | 556,404 |
| 12 x 12 Multiplication Table in 2 Minutes | 0 | - | 4.81 | 799,454 |
| Religion A-Z #2 | 0 | - | 4.41 | 36,907 |
| Geography by Letter - A | 0 | - | 4.74 | 210,841 |
| Geography by Letter - B | 0 | - | 4.56 | 183,799 |
| Geography by Letter - H | 0 | - | 4.69 | 149,661 |
| Geography by Letter - C | 0 | - | 4.47 | 158,013 |
| Geography by Letter - D | 0 | - | 4.50 | 149,910 |
| Geography by Letter - E | 0 | - | 4.42 | 147,030 |
| Geography by Letter - I | 0 | - | 4.42 | 121,517 |
| Geography by Letter - K | 0 | - | 4.53 | 117,647 |
| Geography by Letter - L | 0 | - | 4.43 | 147,990 |
| Geography by Letter - M | 0 | - | 4.49 | 118,159 |
| Geography by Letter - N | 0 | - | 4.51 | 126,595 |
| Geography by Letter - P | 0 | - | 4.47 | 175,511 |
| Geography by Letter - R | 0 | - | 4.44 | 130,777 |
| Geography by Letter - S #1 | 0 | - | 4.74 | 140,000 |
| Geography by Letter - U | 0 | - | 4.53 | 142,479 |
| Asian Geography By Letter - K | 0 | - | 4.74 | 58,038 |
| Geography Containing the Letter X | 0 | - | 4.42 | 34,516 |
| American Football A-Z | 0 | - | 4.26 | 14,488 |
| MLB Baseball A-Z #2 | 0 | - | 4.11 | 17,045 |
| A to Z: Musical Terms | 0 | - | 4.43 | 41,189 |
| Geography A-Z #2 | 0 | - | 4.46 | 52,773 |
| Switzerland A-Z | 0 | - | 4.45 | 25,566 |
| Geography A-Z #5 | 0 | - | 4.47 | 37,250 |
| Geography A-Z #1 | 0 | - | 4.56 | 69,439 |
| Movies that Start with G | 0 | - | 4.48 | 68,377 |
| Movies that Start with I | 0 | - | 4.41 | 65,030 |
| Brand Logos That Start with A | 0 | - | 4.51 | 69,710 |
| Brand Logos That Start With M | 0 | - | 4.45 | 62,173 |
| Former Countries by Territory Map | 0 | - | 4.96 | 102,080 |
| Empires by Maps | 0 | - | 4.98 | 119,227 |
| Art Works Picture Quiz #1 | 0 | - | 4.51 | 118,713 |
| Art Works Picture Quiz #2 | 0 | - | 4.49 | 104,954 |
| Art Works Picture Quiz #3 | 0 | - | 4.45 | 48,617 |
| Ultimate 20th Century History Quiz | 0 | - | 4.86 | 53,426 |
| WWI... or WWII? | 0 | - | 4.85 | 141,314 |
| Famous Battles Quiz | 0 | - | 4.21 | 48,909 |
| Name the War | 0 | - | 4.37 | 201,174 |
| Famous U.S. Generals | 0 | - | 4.27 | 38,466 |
| Famous Firsts #1 | 0 | - | 4.40 | 68,938 |
| Famous Families #1 | 0 | - | 4.20 | 83,485 |
| Names for Warriors | 0 | - | 4.40 | 36,854 |
| Famous Firsts #2 | 0 | - | 4.01 | 80,927 |
| The 7 Wonders of the Ancient World | 0 | - | 4.85 | 82,212 |
| 2010s Decade Quiz | 0 | - | 4.53 | 101,419 |
| People in History by Wikipedia Descriptions #1 | 0 | - | 4.42 | 44,285 |
| People in History by Wikipedia Descriptions #2 | 0 | - | 4.42 | 39,401 |
| People in History by Wikipedia Descriptions #3 | 0 | - | 4.50 | 36,633 |
| Countries by Military Spending | 0 | - | 4.93 | 176,911 |
| Classic Novels by Plot #2 | 0 | - | 4.87 | 37,707 |
| 12x12 Multiplication - The Whopper | 0 | - | 4.92 | 120,062 |
| Animals that Start with L | 0 | - | 4.47 | 101,669 |
| Animals that Start with P | 0 | - | 4.45 | 85,922 |
| Animals that Start with S | 0 | - | 4.49 | 87,107 |
| Geography by Letter on the World Map - B | 0 | - | 4.52 | 89,919 |
| Geography by Letter on the World Map - C | 0 | - | 4.78 | 116,953 |
| Ethnic Groups A-Z | 0 | - | 4.50 | 42,140 |
| Space Exploration Trivia | 0 | - | 4.38 | 35,251 |
| Famous Generals - Non U.S. | 0 | - | 4.58 | 15,063 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,309,590 |
| Disney A-Z | 0 | - | 4.37 | 86,785 |
| Literature by Letter - A | 0 | - | 4.23 | 31,821 |
| Literature by Letter - Q, X, Y, and Z | 0 | - | 4.42 | 15,097 |
| Companies A-Z | 0 | - | 4.30 | 42,646 |
| Religion A-Z #1 | 0 | - | 4.32 | 61,544 |
| Geography by Letter - G | 0 | - | 4.35 | 125,791 |
| Geography by Letter - F | 0 | - | 4.27 | 137,374 |
| Geography by Letter - J | 0 | - | 4.34 | 122,459 |
| Geography by Letter - O | 0 | - | 4.37 | 129,304 |
| Geography by Letter - V | 0 | - | 4.39 | 121,262 |
| Geography by Letter - W | 0 | - | 4.39 | 114,468 |
| Geography by Letter - Y | 0 | - | 4.39 | 110,947 |
| Geography by Letter - Z | 0 | - | 4.11 | 81,287 |
| Geography by Letter - Q | 0 | - | 4.38 | 69,122 |
| Same Start and End Letter - Geography #1 | 0 | - | 4.18 | 35,164 |
| Video Games A-Z | 0 | - | 4.08 | 38,817 |
| Geography A-Z #3 | 0 | - | 4.22 | 39,143 |
| South America A-Z | 0 | - | 4.13 | 10,870 |
| Movies that Start with A | 0 | - | 4.13 | 61,749 |
| Movies that Start with C | 0 | - | 4.30 | 61,695 |
| Movies that Start with B | 0 | - | 4.36 | 85,046 |
| Movies that Start with D | 0 | - | 4.34 | 68,325 |
| Movies that Start with E | 0 | - | 4.13 | 68,254 |
| Movies that Start with J | 0 | - | 4.18 | 76,023 |
| Movies that Start with L | 0 | - | 4.16 | 60,301 |
| Movies that Start with M | 0 | - | 4.28 | 48,141 |
| Movies that Start with N | 0 | - | 4.02 | 41,177 |
| Movies that Start with P | 0 | - | 4.25 | 54,074 |
| Movies that Start with R | 0 | - | 4.17 | 46,540 |
| Movies that Start with W | 0 | - | 4.07 | 44,193 |
| Movies that Start with T | 0 | - | 4.34 | 49,203 |
| Movies that Start with S | 0 | - | 4.35 | 56,362 |
| Movies that Start with F | 0 | - | 4.13 | 68,740 |
| Music by Letter - F | 0 | - | 4.48 | 26,911 |
| Music by Letter - A | 0 | - | 4.61 | 31,275 |
| Brand Logos That Start With B | 0 | - | 4.38 | 59,560 |
| Brand Logos That Start With D | 0 | - | 4.37 | 61,064 |
| Brand Logos That Start With C | 0 | - | 4.17 | 49,278 |
| Brand Logos That Start With L | 0 | - | 4.39 | 60,597 |
| Brand Logos That Start With S | 0 | - | 4.37 | 57,095 |
| Google What's the Difference? - History | 0 | - | 4.20 | 46,114 |
| Metals of Antiquity | 0 | - | 4.94 | 93,104 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,396 |
| Mythical Creatures Quiz #1 | 0 | - | 4.92 | 705,566 |
| Notable People of WWII | 0 | - | 4.53 | 85,460 |
| WWII Trivia #2 | 0 | - | 4.52 | 103,683 |
| World War I Quiz | 0 | - | 4.78 | 100,523 |
| WWI A-Z | 0 | - | 4.50 | 38,138 |
| Oldest Things | 0 | - | 3.92 | 65,626 |
| Famous Homes - Who Lived There? | 0 | - | 4.09 | 26,787 |
| Famous Firsts #3 - The United States | 0 | - | 4.19 | 14,579 |
| 1970s Decade Quiz | 0 | - | 4.20 | 52,437 |
| 2000s Decade Quiz | 0 | - | 4.23 | 120,493 |
| 1980s Decade Quiz | 0 | - | 4.38 | 76,520 |
| 1990s Decade Quiz | 0 | - | 4.01 | 54,707 |
| 1850s Decade Quiz | 0 | - | 4.42 | 35,026 |
| 1790s Decade Quiz | 0 | - | 4.55 | 33,472 |
| 1800s Decade Quiz | 0 | - | 4.47 | 31,760 |
| Years in History #1 - Multiple Choice | 0 | - | 4.85 | 69,978 |
| Star Wars A-Z | 0 | - | 4.46 | 87,595 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 156,329 |
| Top Five Exporting Partners by Country | 0 | - | 4.87 | 66,963 |
| Musical Acts by Letter - J | 0 | - | 4.20 | 77,300 |
