| People in History A-Z #2 | 0 | - | 4.47 | 54,831 |
| People in History A-Z #3 | 0 | - | 4.44 | 45,970 |
| Empires A-Z | 0 | - | 4.51 | 44,841 |
| People in History A-Z #5 | 0 | - | 4.09 | 31,807 |
| Southernmost Countries A-Z | 0 | - | 4.94 | 152,763 |
| Northernmost Countries A-Z | 0 | - | 4.99 | 193,999 |
| Least Populous Countries A-Z | 0 | - | 4.99 | 169,420 |
| Biggest Countries by Area A-Z | 0 | - | 4.96 | 190,817 |
| Most Populous Countries A-Z | 0 | - | 4.98 | 299,431 |
| Countries A-Z by Neighbor | 0 | - | 5.00 | 179,420 |
| Countries with the Greatest Elevation A-Z | 0 | - | 4.83 | 72,186 |
| Name an Official Language A-Z | 0 | - | 4.91 | 174,828 |
| 20th Century A-Z | 0 | - | 4.50 | 53,178 |
| 19th Century A-Z | 0 | - | 4.77 | 46,746 |
| 18th Century A-Z | 0 | - | 4.54 | 42,655 |
| People in History A-Z #4 | 0 | - | 4.10 | 22,927 |
| History by Letter - A | 0 | - | 4.51 | 152,148 |
| History by Letter - B | 0 | - | 4.45 | 171,295 |
| History by Letter - C | 0 | - | 4.69 | 170,361 |
| History by Letter - E | 0 | - | 4.51 | 139,887 |
| History by Letter - G | 0 | - | 4.45 | 121,477 |
| History by Letter - H | 0 | - | 4.45 | 135,902 |
| History by Letter - J | 0 | - | 4.51 | 153,270 |
| History by Letter - N | 0 | - | 4.44 | 103,408 |
| History by Letter - S | 0 | - | 4.47 | 93,695 |
| History by Letter - W | 0 | - | 4.45 | 108,764 |
| History by Letter - M | 0 | - | 4.54 | 119,123 |
| History by Letter - K | 0 | - | 4.50 | 100,845 |
| History by Letter - L | 0 | - | 4.49 | 111,532 |
| History by Letter - I | 0 | - | 4.46 | 103,701 |
| A to Z: Musical Terms | 0 | - | 4.43 | 41,081 |
| Geography A-Z #2 | 0 | - | 4.46 | 52,695 |
| Geography A-Z #5 | 0 | - | 4.47 | 37,194 |
| Geography A-Z #1 | 0 | - | 4.56 | 69,344 |
| 16th Century A-Z | 0 | - | 4.58 | 24,389 |
| 15th Century A-Z | 0 | - | 4.49 | 23,401 |
| Countries that Start with a Vowel | 0 | - | 4.99 | 128,747 |
| Geography by Letter - T | 0 | - | 4.84 | 152,484 |
| People in History by Wikipedia Descriptions #1 | 0 | - | 4.42 | 44,215 |
| People in History by Wikipedia Descriptions #2 | 0 | - | 4.42 | 39,341 |
| People in History by Wikipedia Descriptions #3 | 0 | - | 4.50 | 36,595 |
| World Cities A-Z by Clue #1 | 0 | - | 4.49 | 66,191 |
| Islands A-Z | 0 | - | 4.46 | 116,800 |
| World Cities A-Z by Clue #2 | 0 | - | 4.40 | 57,655 |
| Human Body A-Z | 0 | - | 4.51 | 128,458 |
| Asian Cities A-Z by Clue | 0 | - | 4.51 | 34,360 |
| Animals A-Z #1 | 0 | - | 4.41 | 92,830 |
| Africa A-Z | 0 | - | 4.57 | 46,385 |
| Diseases and Medical Conditions A-Z | 0 | - | 4.60 | 47,530 |
| Ethnic Groups A-Z | 0 | - | 4.50 | 42,059 |
| History by Letter - D | 0 | - | 4.39 | 136,909 |
| History by Letter - F | 0 | - | 4.18 | 113,712 |
| History by Letter - O | 0 | - | 4.31 | 99,067 |
| History by Letter - P | 0 | - | 4.38 | 107,367 |
| History by Letter - Q | 0 | - | 4.34 | 79,990 |
| History by Letter - R | 0 | - | 4.26 | 121,675 |
| History by Letter - T | 0 | - | 4.39 | 104,896 |
| History by Letter - U | 0 | - | 4.19 | 100,265 |
| History by Letter - V | 0 | - | 4.27 | 80,382 |
| History by Letter - Y | 0 | - | 4.27 | 86,943 |
| History by Letter - Z | 0 | - | 4.18 | 76,748 |
| The 3rd and 4th Century | 0 | - | 4.60 | 27,122 |
| Disney A-Z | 0 | - | 4.37 | 86,558 |
| Companies A-Z | 0 | - | 4.30 | 42,614 |
| Religion A-Z #1 | 0 | - | 4.32 | 61,492 |
| Religion A-Z #2 | 0 | - | 4.40 | 36,823 |
| Geography by Letter on the World Map - A-Z | 0 | - | 4.89 | 81,304 |
| Geography by Letter on the World Map - A | 0 | - | 4.81 | 106,953 |
| Video Games A-Z | 0 | - | 4.08 | 38,714 |
| Geography A-Z #3 | 0 | - | 4.22 | 39,082 |
| World Cities Based on Location A-Z - #1 | 0 | - | 4.45 | 44,161 |
| Time Magazine Person of the Year | 0 | - | 4.53 | 73,578 |
| Countries That Were Invaded | 0 | - | 4.54 | 96,931 |
| 14th Century A-Z | 0 | - | 4.41 | 23,761 |
| Military History A-Z | 0 | - | 4.20 | 21,043 |
| Double Letters A-Z | 0 | - | 4.51 | 27,075 |
| Animals A-Z #2 | 0 | - | 4.11 | 66,057 |
| Canada A-Z | 0 | - | 4.73 | 32,654 |
| Shortest Country Name A-Z | 0 | - | 5.00 | 234,930 |
| Normandy D-Day Beaches | 0 | - | 4.83 | 40,123 |
| Territory Changes in World War I | 0 | - | 4.86 | 46,246 |
| Same Start and End Letter - History #1 | 0 | - | 4.16 | 24,667 |
| Same Start and End Letter - History #2 | 0 | - | 4.13 | 25,549 |
| A to Z: Musical Terms #2 | 0 | - | 4.05 | 10,958 |
| Geography A-Z #4 | 0 | - | 4.36 | 25,769 |
| Countries with the Most Borders A-Z | 0 | - | 4.98 | 124,922 |
| People Depicted in Paintings | 0 | - | 4.54 | 44,395 |
| 17th Century A-Z | 0 | - | 4.78 | 34,177 |
| NATO Military Alphabet | 0 | - | 4.98 | 554,507 |
| 12 x 12 Multiplication Table in 2 Minutes | 0 | - | 4.81 | 798,071 |
| Geography by Letter - A | 0 | - | 4.74 | 210,163 |
| Geography by Letter - B | 0 | - | 4.56 | 183,322 |
| Geography by Letter - H | 0 | - | 4.69 | 149,324 |
| Geography by Letter - C | 0 | - | 4.47 | 157,609 |
| Geography by Letter - D | 0 | - | 4.50 | 149,543 |
| Geography by Letter - E | 0 | - | 4.42 | 146,688 |
| Geography by Letter - I | 0 | - | 4.42 | 121,239 |
| Geography by Letter - K | 0 | - | 4.53 | 117,365 |
| Geography by Letter - L | 0 | - | 4.43 | 147,660 |
| Geography by Letter - M | 0 | - | 4.49 | 117,665 |
| Geography by Letter - N | 0 | - | 4.51 | 126,278 |
| Geography by Letter - P | 0 | - | 4.47 | 175,196 |
| Geography by Letter - R | 0 | - | 4.43 | 130,390 |
| Geography by Letter - S #1 | 0 | - | 4.74 | 139,656 |
| Geography by Letter - U | 0 | - | 4.54 | 142,114 |
| Asian Geography By Letter - K | 0 | - | 4.74 | 57,990 |
| Movies that Start with G | 0 | - | 4.48 | 68,257 |
| Movies that Start with I | 0 | - | 4.41 | 64,904 |
| Brand Logos That Start with A | 0 | - | 4.51 | 69,309 |
| Brand Logos That Start With B | 0 | - | 4.41 | 59,226 |
| Brand Logos That Start With M | 0 | - | 4.45 | 61,805 |
| WWII A-Z #1 | 0 | - | 4.80 | 102,416 |
| WWII A-Z #2 | 0 | - | 4.44 | 54,345 |
| Famous Battles Quiz | 0 | - | 4.21 | 48,816 |
| Name the War | 0 | - | 4.37 | 200,806 |
| Famous U.S. Generals | 0 | - | 4.27 | 38,413 |
| Famous Firsts #1 | 0 | - | 4.40 | 68,829 |
| Famous Families #1 | 0 | - | 4.20 | 83,409 |
| Names for Warriors | 0 | - | 4.40 | 36,795 |
| People in History by Wikipedia Descriptions #4 | 0 | - | 4.40 | 30,660 |
| American Football A-Z | 0 | - | 4.26 | 14,475 |
| MLB Baseball A-Z #2 | 0 | - | 4.11 | 17,002 |
| Former Countries by Territory Map | 0 | - | 4.96 | 101,627 |
| Empires by Maps | 0 | - | 4.98 | 118,593 |
| Art Works Picture Quiz #1 | 0 | - | 4.51 | 118,498 |
| Art Works Picture Quiz #2 | 0 | - | 4.49 | 104,690 |
| Art Works Picture Quiz #3 | 0 | - | 4.45 | 48,539 |
| Ultimate 20th Century History Quiz | 0 | - | 4.86 | 53,253 |
| The 7 Wonders of the Ancient World | 0 | - | 4.85 | 82,104 |
| Countries by Military Spending | 0 | - | 4.93 | 176,452 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,305,462 |
| Classic Novels by Plot #2 | 0 | - | 4.87 | 37,540 |
| 12x12 Multiplication - The Whopper | 0 | - | 4.92 | 119,732 |
| Animals that Start with L | 0 | - | 4.47 | 101,320 |
| Animals that Start with P | 0 | - | 4.45 | 85,701 |
| Animals that Start with S | 0 | - | 4.49 | 86,884 |
| Geography by Letter on the World Map - B | 0 | - | 4.52 | 89,660 |
| Geography by Letter on the World Map - C | 0 | - | 4.78 | 116,639 |
| Metals of Antiquity | 0 | - | 4.94 | 92,939 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,200 |
| Space Exploration Trivia | 0 | - | 4.38 | 35,191 |
| WWI... or WWII? | 0 | - | 4.85 | 140,716 |
| Oldest Things | 0 | - | 3.92 | 65,595 |
| Famous Homes - Who Lived There? | 0 | - | 4.09 | 26,768 |
| Famous Firsts #2 | 0 | - | 4.00 | 80,849 |
| Famous Firsts #3 - The United States | 0 | - | 4.17 | 14,492 |
| Famous Generals - Non U.S. | 0 | - | 4.58 | 15,014 |
| Years in History #1 - Multiple Choice | 0 | - | 4.85 | 69,677 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 155,860 |
| Literature by Letter - A | 0 | - | 4.23 | 31,768 |
| Literature by Letter - Q, X, Y, and Z | 0 | - | 4.42 | 15,071 |
| Top Five Exporting Partners by Country | 0 | - | 4.87 | 66,858 |
| Geography by Letter - G | 0 | - | 4.35 | 125,503 |
| Geography by Letter - F | 0 | - | 4.27 | 137,082 |
| Geography by Letter - J | 0 | - | 4.34 | 122,192 |
| Geography by Letter - O | 0 | - | 4.37 | 129,021 |
| Geography by Letter - V | 0 | - | 4.39 | 120,923 |
| Geography by Letter - W | 0 | - | 4.39 | 114,222 |
| Geography by Letter - Y | 0 | - | 4.39 | 110,691 |
| Geography by Letter - Z | 0 | - | 4.11 | 81,061 |
| Geography by Letter - Q | 0 | - | 4.38 | 68,898 |
| Same Start and End Letter - Geography #1 | 0 | - | 4.18 | 35,116 |
| Middle East A-Z | 0 | - | 4.47 | 45,804 |
| South America A-Z | 0 | - | 4.13 | 10,840 |
| Movies that Start with A | 0 | - | 4.13 | 61,647 |
| Movies that Start with C | 0 | - | 4.30 | 61,591 |
| Movies that Start with B | 0 | - | 4.35 | 84,924 |
| Movies that Start with D | 0 | - | 4.34 | 68,227 |
| Movies that Start with E | 0 | - | 4.13 | 68,174 |
| Movies that Start with J | 0 | - | 4.18 | 75,925 |
| Movies that Start with L | 0 | - | 4.16 | 60,229 |
| Movies that Start with M | 0 | - | 4.28 | 48,067 |
| Movies that Start with N | 0 | - | 4.02 | 41,108 |
| Movies that Start with P | 0 | - | 4.25 | 54,003 |
| Movies that Start with R | 0 | - | 4.17 | 46,450 |
| Movies that Start with W | 0 | - | 4.07 | 44,135 |
| Movies that Start with T | 0 | - | 4.33 | 49,121 |
| Movies that Start with S | 0 | - | 4.35 | 56,271 |
| Movies that Start with F | 0 | - | 4.13 | 68,646 |
| Music by Letter - F | 0 | - | 4.48 | 26,836 |
| Music by Letter - A | 0 | - | 4.61 | 31,204 |
| Brand Logos That Start With D | 0 | - | 4.37 | 60,713 |
| Brand Logos That Start With C | 0 | - | 4.17 | 49,042 |
| Brand Logos That Start With L | 0 | - | 4.39 | 60,224 |
| Brand Logos That Start With S | 0 | - | 4.37 | 56,756 |
| Influential Women in History | 0 | - | 4.42 | 35,061 |
| Google What's the Difference? - History | 0 | - | 4.20 | 46,034 |
| Cradles of Civilization | 0 | - | 4.46 | 39,128 |
| Materials From History #1 | 0 | - | 4.56 | 50,641 |
| Mythical Creatures Quiz #1 | 0 | - | 4.92 | 704,501 |
| Notable People of WWII | 0 | - | 4.53 | 85,328 |
| WWII Trivia #2 | 0 | - | 4.52 | 103,445 |
| World War I Quiz | 0 | - | 4.78 | 100,291 |
| WWI A-Z | 0 | - | 4.50 | 38,036 |
| Biggest Nations and Empires Ever | 0 | - | 4.46 | 145,237 |
| Famous Explorers | 0 | - | 4.58 | 35,971 |
| Famous Empires by Description | 0 | - | 4.70 | 117,904 |
| Answers by Time Period | 0 | - | 4.63 | 55,287 |
| Star Wars A-Z | 0 | - | 4.46 | 87,201 |
| Musical Acts by Letter - J | 0 | - | 4.20 | 77,186 |
