| Empires A-Z | 0 | - | 4.52 | 45,503 |
| History by Letter - A | 0 | - | 4.51 | 153,992 |
| History by Letter - B | 0 | - | 4.45 | 173,419 |
| History by Letter - C | 0 | - | 4.70 | 172,759 |
| History by Letter - E | 0 | - | 4.51 | 141,580 |
| History by Letter - G | 0 | - | 4.46 | 123,077 |
| History by Letter - H | 0 | - | 4.45 | 137,673 |
| History by Letter - J | 0 | - | 4.51 | 155,111 |
| History by Letter - N | 0 | - | 4.45 | 104,863 |
| History by Letter - S | 0 | - | 4.47 | 95,035 |
| History by Letter - W | 0 | - | 4.45 | 110,282 |
| History by Letter - M | 0 | - | 4.54 | 120,767 |
| History by Letter - K | 0 | - | 4.50 | 102,065 |
| History by Letter - L | 0 | - | 4.50 | 112,871 |
| History by Letter - I | 0 | - | 4.46 | 105,094 |
| Countries that Start with a Vowel | 0 | - | 4.99 | 155,661 |
| Geography by Letter - T | 0 | - | 4.84 | 155,440 |
| People in History A-Z #1 | 0 | - | 4.63 | 99,789 |
| People in History A-Z #2 | 0 | - | 4.47 | 55,518 |
| People in History A-Z #3 | 0 | - | 4.44 | 46,479 |
| History by Letter - D | 0 | - | 4.40 | 138,675 |
| History by Letter - F | 0 | - | 4.19 | 115,145 |
| History by Letter - O | 0 | - | 4.32 | 100,334 |
| History by Letter - P | 0 | - | 4.36 | 108,532 |
| History by Letter - Q | 0 | - | 4.34 | 80,843 |
| History by Letter - R | 0 | - | 4.26 | 122,876 |
| History by Letter - T | 0 | - | 4.39 | 105,862 |
| History by Letter - U | 0 | - | 4.19 | 101,377 |
| History by Letter - V | 0 | - | 4.27 | 81,253 |
| History by Letter - Y | 0 | - | 4.27 | 87,766 |
| History by Letter - Z | 0 | - | 4.20 | 77,498 |
| The 3rd and 4th Century | 0 | - | 4.60 | 27,363 |
| Geography by Letter on the World Map - A-Z | 0 | - | 4.87 | 83,152 |
| Geography by Letter on the World Map - A | 0 | - | 4.81 | 109,024 |
| Southernmost Countries A-Z | 0 | - | 4.95 | 154,194 |
| Northernmost Countries A-Z | 0 | - | 4.99 | 196,838 |
| Least Populous Countries A-Z | 0 | - | 4.99 | 171,031 |
| Biggest Countries by Area A-Z | 0 | - | 4.96 | 194,157 |
| Most Populous Countries A-Z | 0 | - | 4.98 | 302,155 |
| Countries A-Z by Neighbor | 0 | - | 5.00 | 181,394 |
| Countries with the Greatest Elevation A-Z | 0 | - | 4.83 | 73,590 |
| 20th Century A-Z | 0 | - | 4.50 | 54,029 |
| 19th Century A-Z | 0 | - | 4.77 | 47,506 |
| 18th Century A-Z | 0 | - | 4.54 | 43,355 |
| Time Magazine Person of the Year | 0 | - | 4.53 | 74,506 |
| Countries That Were Invaded | 0 | - | 4.55 | 98,098 |
| People in History A-Z #5 | 0 | - | 4.09 | 32,146 |
| Shortest Country Name A-Z | 0 | - | 4.99 | 238,903 |
| Name an Official Language A-Z | 0 | - | 4.91 | 177,121 |
| Normandy D-Day Beaches | 0 | - | 4.84 | 40,773 |
| Territory Changes in World War I | 0 | - | 4.88 | 47,339 |
| Same Start and End Letter - History #1 | 0 | - | 4.18 | 24,815 |
| Same Start and End Letter - History #2 | 0 | - | 4.13 | 25,804 |
| Countries with the Most Borders A-Z | 0 | - | 4.98 | 125,657 |
| People Depicted in Paintings | 0 | - | 4.55 | 44,852 |
| 16th Century A-Z | 0 | - | 4.59 | 25,040 |
| 15th Century A-Z | 0 | - | 4.50 | 24,033 |
| 14th Century A-Z | 0 | - | 4.41 | 24,526 |
| 17th Century A-Z | 0 | - | 4.78 | 34,782 |
| Brand Logos That Start with A | 0 | - | 4.52 | 71,307 |
| NATO Military Alphabet | 0 | - | 4.98 | 564,969 |
| Religion A-Z #2 | 0 | - | 4.41 | 37,145 |
| Geography by Letter - A | 0 | - | 4.74 | 213,164 |
| Geography by Letter - B | 0 | - | 4.56 | 186,055 |
| Geography by Letter - H | 0 | - | 4.69 | 151,614 |
| Geography by Letter - C | 0 | - | 4.48 | 159,932 |
| Geography by Letter - D | 0 | - | 4.50 | 151,881 |
| Geography by Letter - E | 0 | - | 4.42 | 148,708 |
| Geography by Letter - I | 0 | - | 4.42 | 122,890 |
| Geography by Letter - K | 0 | - | 4.54 | 119,370 |
| Geography by Letter - L | 0 | - | 4.44 | 149,740 |
| Geography by Letter - M | 0 | - | 4.50 | 119,723 |
| Geography by Letter - N | 0 | - | 4.51 | 128,084 |
| Geography by Letter - P | 0 | - | 4.47 | 177,043 |
| Geography by Letter - R | 0 | - | 4.43 | 132,826 |
| Geography by Letter - S #1 | 0 | - | 4.74 | 141,630 |
| Geography by Letter - U | 0 | - | 4.52 | 144,262 |
| Asian Geography By Letter - K | 0 | - | 4.75 | 58,401 |
| Geography Containing the Letter X | 0 | - | 4.42 | 34,799 |
| A to Z: Musical Terms | 0 | - | 4.43 | 41,587 |
| Geography A-Z #2 | 0 | - | 4.46 | 53,178 |
| Geography A-Z #5 | 0 | - | 4.44 | 37,528 |
| Geography A-Z #1 | 0 | - | 4.56 | 69,854 |
| Movies that Start with G | 0 | - | 4.49 | 68,851 |
| Movies that Start with I | 0 | - | 4.41 | 65,447 |
| WWII A-Z #1 | 0 | - | 4.73 | 103,459 |
| WWII A-Z #2 | 0 | - | 4.44 | 54,937 |
| Famous Battles Quiz | 0 | - | 4.21 | 49,169 |
| Name the War | 0 | - | 4.37 | 202,962 |
| Famous U.S. Generals | 0 | - | 4.27 | 38,651 |
| Famous Firsts #1 | 0 | - | 4.40 | 69,460 |
| Famous Families #1 | 0 | - | 4.20 | 83,769 |
| Names for Warriors | 0 | - | 4.40 | 37,080 |
| Famous Firsts #2 | 0 | - | 4.01 | 81,449 |
| People in History A-Z #4 | 0 | - | 4.11 | 23,205 |
| Former Countries by Territory Map | 0 | - | 4.96 | 104,159 |
| Empires by Maps | 0 | - | 4.98 | 122,468 |
| Art Works Picture Quiz #1 | 0 | - | 4.51 | 119,932 |
| Art Works Picture Quiz #2 | 0 | - | 4.49 | 106,019 |
| Art Works Picture Quiz #3 | 0 | - | 4.45 | 49,000 |
| Ultimate 20th Century History Quiz | 0 | - | 4.87 | 54,218 |
| The 7 Wonders of the Ancient World | 0 | - | 4.86 | 82,660 |
| Military History A-Z | 0 | - | 4.20 | 21,268 |
| People in History by Wikipedia Descriptions #1 | 0 | - | 4.42 | 44,511 |
| People in History by Wikipedia Descriptions #2 | 0 | - | 4.42 | 39,591 |
| People in History by Wikipedia Descriptions #3 | 0 | - | 4.50 | 36,791 |
| Countries by Military Spending | 0 | - | 4.93 | 179,150 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,327,171 |
| Classic Novels by Plot #2 | 0 | - | 4.86 | 38,644 |
| 12x12 Multiplication - The Whopper | 0 | - | 4.92 | 121,848 |
| Animals that Start with L | 0 | - | 4.47 | 102,524 |
| Animals that Start with P | 0 | - | 4.45 | 86,543 |
| Animals that Start with S | 0 | - | 4.49 | 87,742 |
| Geography by Letter on the World Map - B | 0 | - | 4.49 | 91,205 |
| Geography by Letter on the World Map - C | 0 | - | 4.77 | 118,691 |
| World Cities A-Z by Clue #1 | 0 | - | 4.51 | 78,094 |
| Islands A-Z | 0 | - | 4.46 | 128,014 |
| World Cities A-Z by Clue #2 | 0 | - | 4.41 | 60,423 |
| Human Body A-Z | 0 | - | 4.51 | 130,123 |
| Asian Cities A-Z by Clue | 0 | - | 4.52 | 43,070 |
| Africa A-Z | 0 | - | 4.57 | 46,793 |
| Diseases and Medical Conditions A-Z | 0 | - | 4.70 | 58,287 |
| Ethnic Groups A-Z | 0 | - | 4.51 | 42,558 |
| Metals of Antiquity | 0 | - | 4.95 | 94,012 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 47,203 |
| Space Exploration Trivia | 0 | - | 4.38 | 35,493 |
| WWI... or WWII? | 0 | - | 4.85 | 143,765 |
| Oldest Things | 0 | - | 3.92 | 65,722 |
| Famous Homes - Who Lived There? | 0 | - | 4.09 | 26,869 |
| Famous Firsts #3 - The United States | 0 | - | 4.20 | 14,953 |
| Famous Generals - Non U.S. | 0 | - | 4.59 | 15,260 |
| Years in History #1 - Multiple Choice | 0 | - | 4.82 | 70,698 |
| Brand Logos That Start With B | 0 | - | 4.38 | 60,753 |
| Brand Logos That Start With D | 0 | - | 4.37 | 62,318 |
| Brand Logos That Start With C | 0 | - | 4.21 | 50,224 |
| Brand Logos That Start With L | 0 | - | 4.40 | 62,024 |
| Brand Logos That Start With M | 0 | - | 4.38 | 63,646 |
| Brand Logos That Start With S | 0 | - | 4.37 | 58,423 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 158,720 |
| Disney A-Z | 0 | - | 4.37 | 87,556 |
| Literature by Letter - A | 0 | - | 4.24 | 32,403 |
| Literature by Letter - Q, X, Y, and Z | 0 | - | 4.42 | 15,433 |
| Companies A-Z | 0 | - | 4.30 | 42,782 |
| Top Five Exporting Partners by Country | 0 | - | 4.87 | 67,500 |
| Religion A-Z #1 | 0 | - | 4.32 | 61,759 |
| Geography by Letter - G | 0 | - | 4.33 | 127,202 |
| Geography by Letter - F | 0 | - | 4.28 | 138,904 |
| Geography by Letter - J | 0 | - | 4.35 | 123,780 |
| Geography by Letter - O | 0 | - | 4.37 | 130,596 |
| Geography by Letter - V | 0 | - | 4.39 | 122,744 |
| Geography by Letter - W | 0 | - | 4.39 | 115,589 |
| Geography by Letter - Y | 0 | - | 4.39 | 112,295 |
| Geography by Letter - Z | 0 | - | 4.11 | 82,281 |
| Geography by Letter - Q | 0 | - | 4.38 | 70,183 |
| Same Start and End Letter - Geography #1 | 0 | - | 4.15 | 35,396 |
| Video Games A-Z | 0 | - | 4.05 | 39,277 |
| Geography A-Z #3 | 0 | - | 4.22 | 39,424 |
| Middle East A-Z | 0 | - | 4.47 | 46,268 |
| World Cities Based on Location A-Z - #1 | 0 | - | 4.46 | 44,580 |
| Movies that Start with A | 0 | - | 4.13 | 62,164 |
| Movies that Start with C | 0 | - | 4.30 | 62,171 |
| Movies that Start with B | 0 | - | 4.36 | 85,727 |
| Movies that Start with D | 0 | - | 4.34 | 68,690 |
| Movies that Start with E | 0 | - | 4.13 | 68,628 |
| Movies that Start with J | 0 | - | 4.18 | 76,446 |
| Movies that Start with L | 0 | - | 4.16 | 60,631 |
| Movies that Start with M | 0 | - | 4.28 | 48,419 |
| Movies that Start with N | 0 | - | 4.02 | 41,412 |
| Movies that Start with P | 0 | - | 4.25 | 54,310 |
| Movies that Start with R | 0 | - | 4.17 | 46,842 |
| Movies that Start with W | 0 | - | 4.07 | 44,383 |
| Movies that Start with T | 0 | - | 4.34 | 49,482 |
| Movies that Start with S | 0 | - | 4.35 | 56,665 |
| Movies that Start with F | 0 | - | 4.13 | 69,114 |
| Music by Letter - F | 0 | - | 4.47 | 27,149 |
| Music by Letter - A | 0 | - | 4.61 | 31,550 |
| Influential Women in History | 0 | - | 4.43 | 36,552 |
| Google What's the Difference? - History | 0 | - | 4.20 | 46,397 |
| Cradles of Civilization | 0 | - | 4.46 | 40,529 |
| Materials From History #1 | 0 | - | 4.56 | 52,114 |
| Mythical Creatures Quiz #1 | 0 | - | 4.92 | 710,562 |
| Notable People of WWII | 0 | - | 4.53 | 86,624 |
| WWII Trivia #2 | 0 | - | 4.52 | 104,685 |
| World War I Quiz | 0 | - | 4.78 | 102,150 |
| WWI A-Z | 0 | - | 4.51 | 38,655 |
| Biggest Nations and Empires Ever | 0 | - | 4.46 | 146,738 |
| Famous Explorers | 0 | - | 4.58 | 36,401 |
| Famous Empires by Description | 0 | - | 4.74 | 119,048 |
| Answers by Time Period | 0 | - | 4.64 | 55,930 |
| Coups d'Etat - Name the Country | 0 | - | 4.43 | 42,265 |
| People in History by Wikipedia Descriptions #4 | 0 | - | 4.41 | 30,807 |
| Star Wars A-Z | 0 | - | 4.46 | 88,950 |
| Musical Acts by Letter - J | 0 | - | 4.17 | 77,781 |
| Musical Acts by Letter - M | 0 | - | 4.15 | 93,894 |
| Musical Acts by Letter - N | 0 | - | 4.17 | 68,608 |
| Musical Acts by Letter - P | 0 | - | 4.24 | 65,709 |
| Musical Acts by Letter - R | 0 | - | 4.33 | 83,642 |
| Musical Acts by Letter - T | 0 | - | 4.15 | 68,336 |
| Musical Acts by Letter - A | 0 | - | 4.29 | 83,187 |
| Musical Acts by Letter - B | 0 | - | 4.32 | 73,731 |
