| People in History A-Z #2 | 0 | - | 4.47 | 54,775 |
| People in History A-Z #3 | 0 | - | 4.44 | 45,933 |
| Empires A-Z | 0 | - | 4.51 | 44,778 |
| People in History A-Z #5 | 0 | - | 4.09 | 31,779 |
| Southernmost Countries A-Z | 0 | - | 4.94 | 152,660 |
| Northernmost Countries A-Z | 0 | - | 4.99 | 193,820 |
| Least Populous Countries A-Z | 0 | - | 4.99 | 169,329 |
| Biggest Countries by Area A-Z | 0 | - | 4.95 | 190,628 |
| Most Populous Countries A-Z | 0 | - | 4.98 | 299,287 |
| Countries A-Z by Neighbor | 0 | - | 5.00 | 179,295 |
| Countries with the Greatest Elevation A-Z | 0 | - | 4.83 | 72,084 |
| Name an Official Language A-Z | 0 | - | 4.90 | 174,621 |
| 20th Century A-Z | 0 | - | 4.50 | 53,132 |
| 19th Century A-Z | 0 | - | 4.77 | 46,707 |
| 18th Century A-Z | 0 | - | 4.54 | 42,618 |
| People in History A-Z #4 | 0 | - | 4.10 | 22,903 |
| History by Letter - A | 0 | - | 4.51 | 152,028 |
| History by Letter - B | 0 | - | 4.45 | 171,171 |
| History by Letter - C | 0 | - | 4.69 | 170,194 |
| History by Letter - E | 0 | - | 4.51 | 139,764 |
| History by Letter - G | 0 | - | 4.45 | 121,375 |
| History by Letter - H | 0 | - | 4.45 | 135,805 |
| History by Letter - J | 0 | - | 4.51 | 153,153 |
| History by Letter - N | 0 | - | 4.44 | 103,342 |
| History by Letter - S | 0 | - | 4.47 | 93,629 |
| History by Letter - W | 0 | - | 4.45 | 108,671 |
| History by Letter - M | 0 | - | 4.54 | 119,037 |
| History by Letter - K | 0 | - | 4.50 | 100,781 |
| History by Letter - L | 0 | - | 4.49 | 111,451 |
| History by Letter - I | 0 | - | 4.46 | 103,627 |
| A to Z: Musical Terms | 0 | - | 4.43 | 40,982 |
| Geography A-Z #2 | 0 | - | 4.46 | 52,663 |
| Geography A-Z #5 | 0 | - | 4.47 | 37,170 |
| Geography A-Z #1 | 0 | - | 4.56 | 69,308 |
| 16th Century A-Z | 0 | - | 4.58 | 24,367 |
| 15th Century A-Z | 0 | - | 4.49 | 23,380 |
| Countries that Start with a Vowel | 0 | - | 4.99 | 128,489 |
| Geography by Letter - T | 0 | - | 4.84 | 152,211 |
| People in History by Wikipedia Descriptions #1 | 0 | - | 4.42 | 44,180 |
| People in History by Wikipedia Descriptions #2 | 0 | - | 4.42 | 39,316 |
| People in History by Wikipedia Descriptions #3 | 0 | - | 4.50 | 36,575 |
| World Cities A-Z by Clue #1 | 0 | - | 4.54 | 65,268 |
| Islands A-Z | 0 | - | 4.46 | 116,678 |
| World Cities A-Z by Clue #2 | 0 | - | 4.44 | 56,847 |
| Human Body A-Z | 0 | - | 4.51 | 128,207 |
| Asian Cities A-Z by Clue | 0 | - | 4.53 | 33,700 |
| Animals A-Z #1 | 0 | - | 4.41 | 92,770 |
| Africa A-Z | 0 | - | 4.57 | 46,349 |
| Diseases and Medical Conditions A-Z | 0 | - | 4.60 | 47,453 |
| Ethnic Groups A-Z | 0 | - | 4.50 | 42,021 |
| History by Letter - D | 0 | - | 4.39 | 136,825 |
| History by Letter - F | 0 | - | 4.18 | 113,640 |
| History by Letter - O | 0 | - | 4.31 | 99,005 |
| History by Letter - P | 0 | - | 4.38 | 107,288 |
| History by Letter - Q | 0 | - | 4.34 | 79,940 |
| History by Letter - R | 0 | - | 4.26 | 121,596 |
| History by Letter - T | 0 | - | 4.39 | 104,826 |
| History by Letter - U | 0 | - | 4.19 | 100,188 |
| History by Letter - V | 0 | - | 4.27 | 80,329 |
| History by Letter - Y | 0 | - | 4.27 | 86,901 |
| History by Letter - Z | 0 | - | 4.18 | 76,710 |
| The 3rd and 4th Century | 0 | - | 4.60 | 27,103 |
| Disney A-Z | 0 | - | 4.37 | 86,077 |
| Companies A-Z | 0 | - | 4.30 | 42,601 |
| Religion A-Z #1 | 0 | - | 4.32 | 61,467 |
| Religion A-Z #2 | 0 | - | 4.40 | 36,793 |
| Geography by Letter on the World Map - A-Z | 0 | - | 4.89 | 81,184 |
| Geography by Letter on the World Map - A | 0 | - | 4.81 | 106,813 |
| Video Games A-Z | 0 | - | 4.08 | 38,658 |
| Geography A-Z #3 | 0 | - | 4.22 | 39,057 |
| World Cities Based on Location A-Z - #1 | 0 | - | 4.45 | 44,128 |
| Time Magazine Person of the Year | 0 | - | 4.53 | 73,500 |
| Countries That Were Invaded | 0 | - | 4.54 | 96,877 |
| 14th Century A-Z | 0 | - | 4.40 | 23,646 |
| Military History A-Z | 0 | - | 4.20 | 21,032 |
| Double Letters A-Z | 0 | - | 4.51 | 27,057 |
| Animals A-Z #2 | 0 | - | 4.11 | 66,022 |
| Canada A-Z | 0 | - | 4.73 | 32,634 |
| Shortest Country Name A-Z | 0 | - | 5.00 | 234,623 |
| Normandy D-Day Beaches | 0 | - | 4.83 | 40,079 |
| Territory Changes in World War I | 0 | - | 4.86 | 46,188 |
| Same Start and End Letter - History #1 | 0 | - | 4.16 | 24,654 |
| Same Start and End Letter - History #2 | 0 | - | 4.13 | 25,517 |
| A to Z: Musical Terms #2 | 0 | - | 4.05 | 10,932 |
| Geography A-Z #4 | 0 | - | 4.36 | 25,751 |
| Countries with the Most Borders A-Z | 0 | - | 4.98 | 124,854 |
| People Depicted in Paintings | 0 | - | 4.54 | 44,369 |
| 17th Century A-Z | 0 | - | 4.78 | 34,151 |
| NATO Military Alphabet | 0 | - | 4.98 | 553,645 |
| 12 x 12 Multiplication Table in 2 Minutes | 0 | - | 4.81 | 797,547 |
| Geography by Letter - A | 0 | - | 4.74 | 209,945 |
| Geography by Letter - B | 0 | - | 4.56 | 183,115 |
| Geography by Letter - H | 0 | - | 4.69 | 149,167 |
| Geography by Letter - C | 0 | - | 4.47 | 157,432 |
| Geography by Letter - D | 0 | - | 4.50 | 149,369 |
| Geography by Letter - E | 0 | - | 4.42 | 146,543 |
| Geography by Letter - I | 0 | - | 4.42 | 121,100 |
| Geography by Letter - K | 0 | - | 4.53 | 117,233 |
| Geography by Letter - L | 0 | - | 4.43 | 147,510 |
| Geography by Letter - M | 0 | - | 4.49 | 117,517 |
| Geography by Letter - N | 0 | - | 4.51 | 126,138 |
| Geography by Letter - P | 0 | - | 4.47 | 175,026 |
| Geography by Letter - R | 0 | - | 4.43 | 130,191 |
| Geography by Letter - S #1 | 0 | - | 4.74 | 139,267 |
| Geography by Letter - U | 0 | - | 4.54 | 141,935 |
| Asian Geography By Letter - K | 0 | - | 4.74 | 57,946 |
| Movies that Start with G | 0 | - | 4.48 | 68,221 |
| Movies that Start with I | 0 | - | 4.41 | 64,860 |
| Brand Logos That Start with A | 0 | - | 4.51 | 69,160 |
| Brand Logos That Start With B | 0 | - | 4.41 | 59,115 |
| Brand Logos That Start With M | 0 | - | 4.45 | 61,671 |
| WWII A-Z #1 | 0 | - | 4.80 | 102,324 |
| WWII A-Z #2 | 0 | - | 4.44 | 54,290 |
| Famous Battles Quiz | 0 | - | 4.21 | 48,788 |
| Name the War | 0 | - | 4.37 | 200,684 |
| Famous U.S. Generals | 0 | - | 4.27 | 38,397 |
| Famous Firsts #1 | 0 | - | 4.40 | 68,811 |
| Famous Families #1 | 0 | - | 4.20 | 83,376 |
| Names for Warriors | 0 | - | 4.40 | 36,781 |
| People in History by Wikipedia Descriptions #4 | 0 | - | 4.40 | 30,645 |
| American Football A-Z | 0 | - | 4.26 | 14,471 |
| MLB Baseball A-Z #2 | 0 | - | 4.11 | 16,984 |
| Former Countries by Territory Map | 0 | - | 4.96 | 101,365 |
| Empires by Maps | 0 | - | 4.98 | 118,242 |
| Art Works Picture Quiz #1 | 0 | - | 4.51 | 118,409 |
| Art Works Picture Quiz #2 | 0 | - | 4.49 | 104,580 |
| Art Works Picture Quiz #3 | 0 | - | 4.45 | 48,518 |
| Ultimate 20th Century History Quiz | 0 | - | 4.86 | 53,165 |
| The 7 Wonders of the Ancient World | 0 | - | 4.85 | 82,049 |
| Countries by Military Spending | 0 | - | 4.93 | 176,303 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,303,877 |
| Classic Novels by Plot #2 | 0 | - | 4.87 | 37,448 |
| 12x12 Multiplication - The Whopper | 0 | - | 4.92 | 119,609 |
| Animals that Start with L | 0 | - | 4.47 | 101,211 |
| Animals that Start with P | 0 | - | 4.45 | 85,605 |
| Animals that Start with S | 0 | - | 4.49 | 86,771 |
| Geography by Letter on the World Map - B | 0 | - | 4.52 | 89,562 |
| Geography by Letter on the World Map - C | 0 | - | 4.78 | 116,514 |
| Metals of Antiquity | 0 | - | 4.94 | 92,830 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,108 |
| Space Exploration Trivia | 0 | - | 4.38 | 35,158 |
| WWI... or WWII? | 0 | - | 4.85 | 140,516 |
| Oldest Things | 0 | - | 3.92 | 65,585 |
| Famous Homes - Who Lived There? | 0 | - | 4.09 | 26,757 |
| Famous Firsts #2 | 0 | - | 4.00 | 80,834 |
| Famous Firsts #3 - The United States | 0 | - | 4.17 | 14,484 |
| Famous Generals - Non U.S. | 0 | - | 4.58 | 15,002 |
| Years in History #1 - Multiple Choice | 0 | - | 4.85 | 69,620 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 155,693 |
| Literature by Letter - A | 0 | - | 4.23 | 31,746 |
| Literature by Letter - Q, X, Y, and Z | 0 | - | 4.42 | 15,062 |
| Top Five Exporting Partners by Country | 0 | - | 4.87 | 66,818 |
| Geography by Letter - G | 0 | - | 4.35 | 125,376 |
| Geography by Letter - F | 0 | - | 4.27 | 136,948 |
| Geography by Letter - J | 0 | - | 4.34 | 122,070 |
| Geography by Letter - O | 0 | - | 4.37 | 128,891 |
| Geography by Letter - V | 0 | - | 4.39 | 120,468 |
| Geography by Letter - W | 0 | - | 4.39 | 114,087 |
| Geography by Letter - Y | 0 | - | 4.39 | 110,555 |
| Geography by Letter - Z | 0 | - | 4.11 | 80,940 |
| Geography by Letter - Q | 0 | - | 4.38 | 68,788 |
| Same Start and End Letter - Geography #1 | 0 | - | 4.18 | 35,099 |
| Middle East A-Z | 0 | - | 4.47 | 45,754 |
| South America A-Z | 0 | - | 4.13 | 10,835 |
| Movies that Start with A | 0 | - | 4.13 | 61,610 |
| Movies that Start with C | 0 | - | 4.30 | 61,550 |
| Movies that Start with B | 0 | - | 4.35 | 84,875 |
| Movies that Start with D | 0 | - | 4.34 | 68,201 |
| Movies that Start with E | 0 | - | 4.13 | 68,145 |
| Movies that Start with J | 0 | - | 4.18 | 75,894 |
| Movies that Start with L | 0 | - | 4.16 | 60,201 |
| Movies that Start with M | 0 | - | 4.28 | 48,038 |
| Movies that Start with N | 0 | - | 4.02 | 41,090 |
| Movies that Start with P | 0 | - | 4.25 | 53,976 |
| Movies that Start with R | 0 | - | 4.17 | 46,419 |
| Movies that Start with W | 0 | - | 4.07 | 44,113 |
| Movies that Start with T | 0 | - | 4.33 | 49,088 |
| Movies that Start with S | 0 | - | 4.35 | 56,238 |
| Movies that Start with F | 0 | - | 4.13 | 68,617 |
| Music by Letter - F | 0 | - | 4.48 | 26,780 |
| Music by Letter - A | 0 | - | 4.61 | 31,156 |
| Brand Logos That Start With D | 0 | - | 4.37 | 60,585 |
| Brand Logos That Start With C | 0 | - | 4.17 | 48,966 |
| Brand Logos That Start With L | 0 | - | 4.39 | 60,111 |
| Brand Logos That Start With S | 0 | - | 4.37 | 56,604 |
| Influential Women in History | 0 | - | 4.42 | 34,909 |
| Google What's the Difference? - History | 0 | - | 4.20 | 46,001 |
| Cradles of Civilization | 0 | - | 4.46 | 38,969 |
| Materials From History #1 | 0 | - | 4.56 | 50,532 |
| Mythical Creatures Quiz #1 | 0 | - | 4.92 | 704,071 |
| Notable People of WWII | 0 | - | 4.53 | 85,297 |
| WWII Trivia #2 | 0 | - | 4.52 | 103,380 |
| World War I Quiz | 0 | - | 4.78 | 100,192 |
| WWI A-Z | 0 | - | 4.50 | 38,004 |
| Biggest Nations and Empires Ever | 0 | - | 4.46 | 145,083 |
| Famous Explorers | 0 | - | 4.58 | 35,921 |
| Famous Empires by Description | 0 | - | 4.70 | 117,479 |
| Answers by Time Period | 0 | - | 4.63 | 55,234 |
| Star Wars A-Z | 0 | - | 4.46 | 87,090 |
| Musical Acts by Letter - J | 0 | - | 4.20 | 77,129 |
